机器视觉之Halcon算子--区域特征

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halcon算子较全的中文手册

halcon算子较全的中文手册

1. Halcon算子概述Halcon是一种强大的机器视觉软件,它由MVTec开发,可用于各种工业和非工业应用。

在Halcon中,算子是至关重要的组成部分,它们可以实现图像处理中的各种功能,如滤波、边缘检测、特征提取等。

本文将以算子作为主题,深入探讨Halcon算子的各种特性和用法。

2. Halcon算子的分类Halcon算子可以分为预处理算子、过滤算子、分割算子、匹配算子、测量算子等多个类别。

每个类别都包含了众多的算子,它们可以根据图像处理任务的不同需求进行灵活组合和调用。

3. Halcon算子的特性Halcon算子具有许多独特的特性,如多样的输入输出形式、灵活的参数设置、高效的运算速度等。

这些特性使得Halcon算子在图像处理领域得到广泛应用,并受到了众多工程师和科研人员的喜爱。

4. Halcon算子的使用技巧在使用Halcon算子时,熟练掌握一些技巧和经验是非常重要的。

合理设置算子的参数、选择适当的算法、理解算子的内部原理等,都可以帮助我们更好地使用Halcon算子,提高图像处理的效率和准确性。

通过一些典型的应用案例,我们可以深入了解Halcon算子的实际应用。

这些案例涵盖了工业质检、医疗影像、无人驾驶、智能制造等多个领域,展示了Halcon算子的强大功能和广泛适用性。

6. 我对Halcon算子的个人理解作为一名Halcon用户,我对Halcon算子有着深刻的认识和体会。

我认为Halcon算子不仅仅是图像处理的工具,更是一种思维方式和解决问题的哲学。

通过深入学习和使用Halcon算子,我对图像处理和机器视觉有了全新的认识和理解。

总结与回顾通过本文的全面介绍和深度探讨,我们对Halcon算子有了更加全面和深入的了解。

从算子的分类到使用技巧,再到实际案例分析,我们逐步领略了Halcon算子的强大功能和潜力。

我相信,在今后的工作和研究中,我们可以更好地运用Halcon算子,为图像处理和机器视觉领域的发展做出更大的贡献。

Halcon常见算子的用法

Halcon常见算子的用法

Halcon常见算子的用法1.threshold ( Image :Region : MinGray, MaxGray : )选取从输入图像灰度值的g满足下列条件:MinGray < = g < = MaxGray 的像素为目标。

2.bin_threshold( Image : Region : : )自动确定阈值 Region:黑暗区域为目标图像。

举例:threshold(Image,CircleRegion,200,255)bin_threshold(Image, Region)处理结果如下图:对于threshold 可用于提取任意区域,本例中白色为目标,可提取圆形。

bin_threshold只能将工件区域作为目标。

3.dyn_threshold ( OrigImage, ThresholdImage : RegionDynThresh : Offset, LightDark : )自适应阈值分割:主要用于光照不均匀图像的局部阈值分割,比较两个像素的图像像素RegionDynThresh(Out) 分割区域Offset: 减少噪音引起的问题LightDark 提取光明、黑暗或类似的地方常常与mean_image 函数一起用来处理背景光照分布不均匀的问题。

举例:mean_image (ParticlesRed, Mean, 31, 31) #均值滤波dyn_threshold (ParticlesRed, Mean, SmallRaw, 3, 'light')4.reduce_domain( Image, ROI : ImageReduced : : )主要用来获得选取Image图像中的ROI范围的区域。

用于提取原始图像中感兴趣的区域。

举例:read_image (Image, 'mreut')gen_circle (ROI, 256, 256, 200) * 创建一个圆reduce_domain (Image, ROI, ImageReduced) *和图像结合起来--- 选取图像中的圆范围的图像形成了ROIedges_sub_pix (ImageReduced, Edges, 'lanser2', 0.5, 20, 40) dev_display (Image)dev_display (ROI)dev_display (Edges)处理结果如下图:说明后续处理的区域都在圆的范围内。

halcon 旋转区域算子

halcon 旋转区域算子

halcon 旋转区域算子(实用版)目录1.旋转区域算子的概念2.旋转区域算子的原理3.旋转区域算子的应用4.旋转区域算子的优缺点正文一、旋转区域算子的概念旋转区域算子(Halcon Rotating Area Operator)是一种图像处理算子,主要用于识别和提取图像中的旋转区域特征。

它可以对图像中的目标进行旋转操作,以便更好地匹配和识别。

旋转区域算子广泛应用于计算机视觉、图像识别、目标检测等领域。

二、旋转区域算子的原理旋转区域算子的原理是基于离散余弦变换(Discrete Cosine Transform,DCT)和旋转矩阵。

在图像处理中,DCT 可以将图像从空间域转换到频率域,从而实现对图像的频率特征进行分析和处理。

旋转矩阵则可以实现对图像的旋转操作。

具体来说,旋转区域算子首先对输入图像进行 DCT 变换,得到图像的频率域表示。

然后,根据预先设定的旋转角度,对频率域图像进行旋转处理,得到旋转后的频率域图像。

最后,将旋转后的频率域图像通过逆 DCT 变换,得到旋转后的空间域图像。

三、旋转区域算子的应用旋转区域算子在实际应用中有很多场景,主要包括:1.图像匹配:在图像匹配任务中,旋转区域算子可以帮助我们提取图像中的旋转特征,从而实现对图像的精确匹配。

2.目标检测:在目标检测任务中,旋转区域算子可以用于检测图像中的旋转目标,例如车牌识别、人脸识别等。

3.图像识别:在图像识别任务中,旋转区域算子可以帮助我们提取图像中的旋转特征,从而提高图像识别的准确性。

四、旋转区域算子的优缺点旋转区域算子具有以下优缺点:优点:1.可以对图像中的旋转区域进行有效识别和提取。

2.具有较好的旋转特性,可以应对不同角度的旋转。

3.可以提高图像处理任务的准确性和鲁棒性。

缺点:1.计算复杂度较高,对计算资源和时间的要求较高。

2.对噪声敏感,容易受到图像噪声的影响。

halcon 取最大区域算子 -回复

halcon 取最大区域算子 -回复

halcon 取最大区域算子-回复Halcon 是一种强大的机器视觉软件,它提供了许多强大的算子,可以用于处理各种各样的图像识别和分析任务。

其中一个非常有用的算子是`取最大区域`。

本文将一步步介绍该算子的功能、用法、和在不同应用场景下的实例。

1. 算子功能:`取最大区域`算子的作用是找到图像中的最大连通区域(blob)。

连通区域指的是由相邻像素组成的图像区域,且它们具有相似的像素值或灰度值。

最大连通区域是指像素数目最多的连通区域。

通过使用`取最大区域`算子,我们可以轻松地筛选出图像中所需的物体或特征。

2. 算子用法:该算子的用法非常简单,只需将待处理的图像作为输入,并指定一些参数即可。

具体步骤如下:a. 导入HDevelop 库:pythonfrom hdevelop import *b. 加载图像并将其转换为灰度图像:pythonimage = read_image('image.png')image_gray = image_to_gray(image)c. 预处理图像,例如使用滤波算法平滑图像:pythonsmooth_image = smooth_image(image_gray, 'gauss', 5) d. 进行区域分割并提取最大区域:pythonregions = threshold(image_gray, 128, 255)max_region = select_shape(regions, 'area', 'max')e. 可选:根据需要可以对最大区域进行进一步的处理,例如计算其面积、周长、中心点坐标等:pythonarea = get_region_area(max_region)perimeter = get_region_perimeter(max_region)center = get_region_center(max_region)3. 算子应用场景:`取最大区域`算子在许多应用场景中都非常有用。

halcon 边缘检测算子

halcon 边缘检测算子

halcon 边缘检测算子(最新版)目录1.边缘检测的定义及目的2.边缘检测算子的分类3.常见边缘检测算子及其特点4.Halcon 边缘检测算子的应用案例5.总结正文边缘检测是图像处理中的一项重要技术,其目的是从图像中提取出具有亮度值(灰度)空间方向梯度大的边缘、线特征。

边缘指的是周围像素灰度有阶跃变化或屋顶等变化的那些像素的集合。

图像的边缘对应着图像灰度的不连续性。

显然,图像的边缘很少是从一个灰度跳到另一个灰度的理想状况。

真实图像的边缘通常都具有有限的宽度,呈现出陡峭的斜坡状。

边缘的锐利程度由图像灰度的梯度决定,梯度是指灰度变化的最快的方向和数量。

边缘检测算子分为多种类型,常见的有 Sobel 算子、Prewitt 算子、Roberts 算子、Laplacian 算子和 Canny 算子等。

这些算子都有各自的特点和适用场景。

Sobel 算子主要用来检测边缘,其技术特点是以离散型的差分算子,用来运算图像亮度函数的梯度的近似值。

Prewitt 算子和Roberts 算子也是常用的边缘检测算子,它们分别采用不同的计算方法来提取边缘信息。

Laplacian 算子则是一种二阶导数算子,可以用来检测图像中的突变区域。

Canny 算子是一种多步骤的边缘检测算法,能够有效地检测出图像中的边缘和线条。

在 Halcon 中,也可以使用这些边缘检测算子来实现边缘检测和线条检测。

以下是一个使用 Halcon 边缘检测算子的例子:```1.读取图像bmp") getimagesize,(image,,width,,height)2.提取边缘edgesimage(image,amp,dir,"lanser2",0.5,"none",-1,-1)3.使用 Hysteresis Threshold 进行边缘检测hysteresisthreshold(amp,margin,20,30,30)4.将彩色图像转换为灰度图像color2gray(image)5.使用 Canny 算子进行边缘检测cannyedge(image,50,150,5)```通过以上代码,我们可以使用 Halcon 实现边缘检测和线条检测。

halcon算子解释

halcon算子解释

halcon算子解释
Halcon算子是Halcon软件中用于图像处理和分析任务的基本操作单元。

每一个Halcon算子都可以接收输入图像并产生输出图像或其他结果,例如区域、角度、面积等。

这些算子可以组合成更复杂的网络,以实现更高级的功能,例如识别、测量、分类、分割和跟踪任务。

Halcon的自定义算子包括算子名称、图标输入参数、图标输出参数、控制输入参数、控制输出参数等。

例如,算子名称可以是“dilation_seq”,用于顺序地扩大一个区域;或者“erosion1”,用于腐蚀一个区域。

Halcon算子的应用非常广泛,可以应用于各种图像处理和分析任务。

例如,可以使用Halcon算子进行图像增强、去噪、分割、特征提取等任务。

此外,Halcon还可以与其他编程语言和平台集成,以实现更复杂的图像处理和分析任务。

在使用Halcon算子时,需要了解每个算子的功能和参数设置,以便正确地选择和设置它们,以获得最佳的结果。

此外,还需要了解每个算子的输入和输出参数类型和格式,以确保它们与算子所需的格式匹配。

Halcon中的区域生长算子

Halcon中的区域生长算子

区域生长算法分类:Halcon学习2010-08-05 09:24 5436人阅读评论(1) 收藏举报算法image测试区域生长算法:既是根据事先定义的准则将像素或者子区域聚合成更大的区域。

基本方法是以“一组”种子开始,将与种子性质相似(灰度级或颜色的特定范围)的相邻像素附加到生长区域的种子上。

Halcon中的区域生长算子(区域生长算法,将图象被分割为区域):regiongrowing( Image : Regions : Row, Column, Tolerance, MinSize : )Row:被测试的区域的垂直距离Column:被测试的区域的水平距离Tolerance:能忍受的最大的灰度差距MinSize:最小的输出区域例:regiongrowing (Image, Regions, 3, 3, 6, 100)<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;mso-font-alt:SimSun; mso-font-charset:134; mso-generic-font-family:auto;mso-font-pitch:variable; mso-font-signature:3 680460288 22 0 262145 0;} @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0;mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-1610611985 1107304683 0 0 415 0;} @font-face {font-family:CMTT9; panose-1:0 0 0 0 0 0 0 0 0 0; mso-font-alt:"Times New Roman"; mso-font-charset:0; mso-generic-font-family:auto;mso-font-format:other; mso-font-pitch:auto; mso-font-signature:3 0 0 0 1 0;} @font-face {font-family:"/@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1; mso-font-charset:134;mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:3 68046028822 0 262145 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal{mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm;margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; mso-pagination:none; font-size:10.5pt; mso-bidi-font-size:12.0pt; font-family:"Times New Roman","serif";mso-fareast-font-family:宋体; mso-font-kerning:1.0pt;} .MsoChpDefault{mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt;mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt; mso-ascii-font-family:"Times NewRoman"; mso-fareast-font-family:宋体; mso-hansi-font-family:"Times New Roman";mso-font-kerning:0pt;} /* Page Definitions */ @page{mso-page-border-surround-header:no; mso-page-border-surround-footer:no;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} -->处理前的图像处理后的图像(将图像划分为一个个区域)。

halcon算子解释

halcon算子解释

halcon算子解释Halcon算子是一种用于图像处理和计算机视觉领域的重要工具。

它通过使用预定义的数学运算符和操作来检测、分割和分析图像。

Halcon算子的设计目的是简化图像处理任务,提高处理精度和效率。

在本文中,我将解释Halcon算子的概念、功能和使用方法,让读者对其有一个全面的了解。

一、Halcon算子简介Halcon算子是由美国明尼苏达大学开发的一种图像处理工具。

它基于强大的数学环境,可以进行各种图像处理操作,包括滤波、边缘检测、形状匹配等。

Halcon算子以其高度灵活性和广泛适应性而受到了广泛的应用。

二、Halcon算子的功能1. 图像预处理:Halcon算子可以对图像进行预处理,包括灰度转换、平滑滤波、直方图均衡化等。

这些操作可以提高图像的质量,为后续的图像分析和处理提供更好的基础。

2. 特征提取与分析:Halcon算子可以检测图像中的特征,并进行跟踪和分析。

例如,可以使用Halcon算子进行形状匹配,找到图像中与参考形状相似的目标物体。

此外,Halcon算子还可以进行边缘检测、角点检测等操作。

3. 形状分割与识别:Halcon算子可以将图像中的目标物体进行分割,并对其进行识别和分类。

通过使用Halcon算子,可以根据目标物体的颜色、形状、纹理等特征将其与背景分离。

4. 三维视觉处理:Halcon算子可以处理三维图像数据,进行三维重建、三维测量等操作。

通过使用Halcon算子,可以提取三维物体的参数,如表面形状和体积等。

三、Halcon算子的使用方法Halcon算子的使用方法相对简单,主要包括以下几个步骤:1. 导入图像:首先,需要将待处理的图像导入到Halcon算子的环境中。

这可以通过图像文件的读取或者直接采集实时图像等方式来完成。

2. 预处理操作:对于导入的图像,可以根据需要进行一些预处理操作,如灰度转换、去噪处理等。

这些操作可以提高后续处理的准确性和效果。

3. 应用算子:根据具体的图像处理任务,选择合适的Halcon算子进行应用。

halcon常用算子

halcon常用算子

halcon常用算子Halcon常用算子Halcon是一款强大的机器视觉软件,它提供了许多常用算子,可以帮助用户快速实现图像处理和分析。

本文将介绍Halcon常用算子的使用方法和应用场景。

1. 图像预处理算子图像预处理算子是Halcon中最常用的算子之一,它可以帮助用户对图像进行去噪、平滑、增强等操作。

其中,常用的算子包括:(1)median_image:中值滤波算子,可以有效地去除图像中的噪声。

(2)gauss_image:高斯滤波算子,可以平滑图像并增强图像的边缘。

(3)gradient_image:梯度算子,可以检测图像中的边缘和轮廓。

(4)scale_image:图像缩放算子,可以将图像缩小或放大。

2. 特征提取算子特征提取算子是Halcon中用于检测和识别目标的重要算子,它可以从图像中提取出目标的特征信息。

其中,常用的算子包括:(1)edges_image:边缘检测算子,可以检测图像中的边缘和轮廓。

(2)region_features:区域特征算子,可以提取出图像中的区域特征,如面积、周长、中心点等。

(3)shape_features:形状特征算子,可以提取出图像中的形状特征,如圆度、矩形度、偏心率等。

(4)texture_features:纹理特征算子,可以提取出图像中的纹理特征,如灰度共生矩阵、灰度共生矩阵等。

3. 目标匹配算子目标匹配算子是Halcon中用于目标检测和识别的重要算子,它可以将图像中的目标与模板进行匹配。

其中,常用的算子包括:(1)find_shape_model:形状匹配算子,可以将图像中的目标与形状模板进行匹配。

(2)find_template:模板匹配算子,可以将图像中的目标与灰度模板进行匹配。

(3)find_surface_model:表面匹配算子,可以将图像中的目标与表面模板进行匹配。

(4)find_bar_code:条形码匹配算子,可以将图像中的条形码进行识别和匹配。

halcon中的region定义

halcon中的region定义

halcon中的region定义Halcon是一种用于机器视觉应用的编程软件,它提供了丰富的图像处理和分析工具。

在Halcon中,Region是一种常用的数据类型,用于表示图像中的特定区域。

本文将介绍Halcon 中Region的定义和常见操作。

在Halcon中,Region是一种由连续的像素点组成的集合,可以用来表示图像中的物体或区域。

Region的定义可以基于像素的坐标、形状或其他特征。

Halcon提供了多种方式来定义Region,下面将介绍其中常用的几种方法。

一种常见的方式是基于像素的坐标来定义Region。

在Halcon 中,我们可以通过指定一个像素的坐标来创建一个Region,然后通过添加其他像素的坐标来扩展这个区域。

例如,我们可以使用以下代码创建一个以(100, 100)为中心,半径为50的圆形区域:```Halconcreate_ring(Ring, 100, 100, 50)```这个代码首先创建了一个空的Region对象Ring,然后使用create_ring函数将一个圆形区域添加到Ring中。

除了使用像素的坐标,我们还可以使用形状来定义Region。

Halcon中提供了多种形状,包括矩形、椭圆、多边形等。

例如,我们可以使用以下代码创建一个矩形区域:```Halconcreate_rectangle1(Rectangle, 100, 100, 200, 150)```这个代码创建了一个以(100, 100)为左上角,宽度为200,高度为150的矩形区域。

类似地,我们可以使用其他函数来创建其他形状的区域。

除了创建Region,Halcon还提供了多种操作来修改和处理Region。

例如,我们可以使用以下代码将两个Region进行并集操作:```Halconunion(Ring1, Ring2, RingUnion)```这个代码将Region Ring1和Ring2进行并集操作,并将结果保存到RingUnion中。

halcon机器视觉算法原理

halcon机器视觉算法原理

halcon机器视觉算法原理Halcon机器视觉算法原理Halcon是一种基于图像处理的机器视觉软件,它广泛应用于工业自动化领域。

Halcon机器视觉算法的原理主要包括图像预处理、特征提取和模式匹配三个步骤。

1. 图像预处理图像预处理是Halcon算法的第一步,目的是对输入的图像进行去噪、增强和边缘检测等操作,以提高后续步骤的准确性和稳定性。

常见的图像预处理方法包括均值滤波、中值滤波、高斯滤波和直方图均衡化等。

2. 特征提取特征提取是Halcon算法的核心步骤,它通过从图像中提取出具有代表性的特征来描述目标物体的形状、纹理和颜色等特征。

常见的特征提取方法包括边缘检测、角点检测、轮廓提取和颜色直方图等。

边缘检测是一种常用的特征提取方法,它通过识别图像中的边缘信息来描述目标物体的形状。

常见的边缘检测算法包括Sobel算子、Prewitt算子和Canny算子等。

角点检测是一种特殊的特征提取方法,它通过识别图像中的角点来描述目标物体的形状和纹理。

常见的角点检测算法包括Harris角点检测算法和Shi-Tomasi角点检测算法等。

轮廓提取是一种常用的特征提取方法,它通过识别图像中的轮廓信息来描述目标物体的形状。

常见的轮廓提取算法包括边缘跟踪算法和形态学轮廓提取算法等。

颜色直方图是一种常用的特征提取方法,它通过统计图像中各个像素的颜色分布来描述目标物体的颜色特征。

常见的颜色直方图算法包括灰度直方图、RGB直方图和HSV直方图等。

3. 模式匹配模式匹配是Halcon算法的最后一步,它通过将提取得到的特征与预先定义的模板进行匹配,从而实现对目标物体的识别和定位。

常见的模式匹配方法包括模板匹配、形状匹配和颜色匹配等。

模板匹配是一种常用的模式匹配方法,它通过将目标物体的特征与模板进行比较,找到最佳匹配的位置。

常见的模板匹配算法包括灰度相关匹配、形态学匹配和尺度不变特征变换(SIFT)等。

形状匹配是一种特殊的模式匹配方法,它通过将目标物体的形状与模板进行比较,找到最佳匹配的位置。

Halcon学习之六:获取Image图像中Region区域的特征参数

Halcon学习之六:获取Image图像中Region区域的特征参数

Halcon学习之六:获取Image图像中Region区域的特征参数1、close_all_framegrabbers ( : : : )关闭所有图像采集设备。

2、close_framegrabber ( : : AcqHandle : )关闭Handle为AcqHandle的图像采集设备。

3、open_framegrabber ( : : Name, HorizontalResolution,VerticalResolution, ImageWidth, ImageHeight, StartRow, StartColumn,Field, BitsPerChannel, ColorSpace, Generic, ExternalTrigger, CameraType, Device, Port, LineIn : AcqHandle )打开图像采集设备参数信息:Name:图像采集设备的名称HorizontalResolution和VerticalResolution:分别指预期的图像采集接口的水平分辨率和垂直分辨率ImageWidth和ImageHeight:指预期图像的宽度部分和高度部分。

StartRow和StartColumn:指显示预期图像的开始坐标Field:预期图像是一半的图像或者是完整图像BitsPerChannel:每像素比特数和图像通道ColorSpace:输出的色彩格式的抓住图像{gray、raw、rgb、yuv、default}Generic:通用参数与设备细节部分的具体意义。

ExternalTrigger:是否有外部触发CameraType:使用相机的类型Device:图像获取设别连接到的设备Port:图像获取设别连接到的端口LineIn :相机输入的多路转接器AcqHandle:图像获取设备的Handle4、grab_image ( : Image : AcqHandle : )获取AcqHandle的图像采集设备的Image。

halcon二值化算子

halcon二值化算子

halcon二值化算子Halcon二值化算子是一种基于图像处理算法的二值化方法,也称作图像二值化算子。

主要用于将一张灰度图像转换为二值图像,使得图像中的信息更加明确、清晰,从而方便后续的图像处理操作。

在这篇文章中,我们将详细介绍Halcon二值化算子的原理、特点和应用。

一、算法原理基本二值化算法原理:将输入的灰度图像中的每个像素的灰度值与阈值进行比较,大于阈值的像素点设定为白色(像素值为1),小于等于阈值的像素点设定为黑色(像素值为0)。

Halcon二值化算子的不同之处在于它不仅仅可以使用固定阈值进行二值化,还能通过自适应阈值和直方图分布进行二值化。

1.1固定阈值方法固定阈值法是最简单的二值化方法,它通过设定一个固定的阈值来进行二值化。

对于某些场景下,二值化效果达到了很好的效果,例如黑白文档或印刷品的识别。

但是在图像中存在光照不均等复杂情况时,固定阈值方法就无法满足需求。

1.2自适应阈值法自适应阈值法是一种在局部范围内根据图像灰度分布动态调整阈值的方法。

它通过将图像分块(block),然后计算每个分块内像素的平均值,并在每个分块内根据平均值进行二值化。

使用自适应阈值法能在不考虑图像大小的情况下,得到一组相对合适的阈值,但对于噪声抑制方面效果不好。

1.3直方图分布法直方图分布法是根据直方图分布来确定阈值的方法,主要适用于图像中像素值分布比较明显并且存在峰值的情况。

该方法首先计算每个像素值出现的概率,然后统计每个概率处于峰值附近的像素值之间的平均值,并将其设定为阈值。

使用直方图分布法能在不考虑图像大小的情况下,得到一组相对合适的阈值,但对于存在多个峰值的图像,效果不是很好。

二、算法应用由于Halcon二值化算子的灵活性和适应性,因此在图像处理、机器视觉和自动化中被广泛应用。

下面列举Halcon二值化算子在几个应用领域中的具体应用:2.1 OCR识别OCR识别过程需要先将原始图像转化为二值化图像,将字符区域从图像中分离出来,然后对字符进行特征提取。

halcon的paint_region 算子说明

halcon的paint_region 算子说明

halcon的paint_region 算子说明Halcon 是一个机器视觉库,提供了一系列算子(函数)来处理和分析图像。

`paint_region` 是其中的一个算子,用于在给定的区域内填充颜色。

以下是 `paint_region` 算子的基本说明:算子名称: `paint_region`描述:在指定的区域内填充颜色。

输入:1. `Image`:要进行操作的图像。

2. `Region`:要填充颜色的区域。

3. `Type`:填充类型,可以是以下之一:`'solid'`:使用一个单一的颜色填充区域。

`'gradient'`:使用从中心到边缘的渐变颜色填充区域。

`'checkerboard'`:使用棋盘格模式填充区域。

4. `Color`(可选):对于 `'solid'` 类型,指定要使用的颜色。

通常以 `(R, G,B)` 的形式提供,其中 R、G 和 B 是 0 到 255 之间的整数。

输出:填充后的图像。

示例:```halcon假设 'Image' 是输入的图像,'Region' 是要填充的区域Image := read_image('')Region := region_grow(Image, 50, 50, 10) % 创建一个从 (50,50) 开始,宽度为 10 的区域PaintedImage := paint_region(Image, Region, 'solid', (255, 0, 0)) %使用红色填充该区域```注意:在使用 `paint_region` 时,确保你已正确地定义了要填充的区域,否则可能得不到预期的结果。

此外,确保你使用的颜色值在正确的范围内(通常是 0 到 255)。

halcon 取最大区域算子

halcon 取最大区域算子

马丁·路德·金英文演讲:我已达至峰顶马丁·路德·金是著名的美国民权运动领袖,今天给大家分享一篇马丁路德金在临死前一天的精彩演讲,希望对大家有所帮助。

马丁·路德·金英文演讲:我已达至峰顶Thank you very kindly, my friends. As I listened to Ralph Abernathy and his eloquent and generous introduction and then thought about myself, I wondered who he was talking about. It's always good to have your closest friend and associate to say something good about you. And Ralph Abernathy is the best friend that I have in the world. I'm delighted to see each of you here tonight in spite of a storm warning. You reveal that you are determined to go on anyhow.Something is happening in Memphis; something is happening in our world. And you know, if I were standing at the beginning of time, with the possibility of taking a kind of general and panoramic view of the whole of human history up to now, and the Almighty said to me, "Martin Luther King, which age would you like to live in?" I would take my mental flight by Egypt and I would watch God's children in their magnificent trek from the dark dungeons of Egypt through, or rather across the Red Sea, through the wilderness on toward the promised land. And in spite of its magnificence, I wouldn't stop there.I would move on by Greece and take my mind to Mount Olympus. And I would see Plato, Aristotle, Socrates, Euripides and Aristophanesassembled around the Parthenon. And I would watch them around the Parthenon as they discussed the great and eternal issues of reality. But I wouldn't stop there.I would go on, even to the great heyday of the Roman Empire. And I would see developments around there, through various emperors and leaders. But I wouldn't stop there.I would even come up to the day of the Renaissance, and get a quick picture of all that the Renaissance did for the cultural and aesthetic life of man. But I wouldn't stop there.I would even go by the way that the man for whom I am named had his habitat. And I would watch Martin Luther as he tacked his ninety-five theses on the door at the church of Wittenberg. But I wouldn't stop there.I would come on up even to 1863, and watch a vacillating President by the name of Abraham Lincoln finally come to the conclusion that he had to sign the Emancipation Proclamation. But I wouldn't stop there.I would even come up to the early thirties, and see a man grappling with the problems of the bankruptcy of his nation. And come with an eloquent cry that we have nothing to fear but "fear itself." But I wouldn't stop there.Strangely enough, I would turn to the Almighty, and say, "If you allow me to live just a few years in the second half of the 20th century, Iwill be happy."Now that's a strange statement to make, because the world is all messed up. The nation is sick. Trouble is in the land; confusion all around. That's a strange statement. But I know, somehow, that only when it is dark enough can you see the stars. And I see God working in this period of the twentieth century in a way that men, in some strange way, are responding.Something is happening in our world. The masses of people are rising up. And wherever they are assembled today, whether they are in Johannesburg, South Africa; Nairobi, Kenya; Accra, Ghana; New York City; Atlanta, Georgia; Jackson, Mississippi; or Memphis, Tennessee -- the cry is always the same: "We want to be free."And another reason that I'm happy to live in this period is that we have been forced to a point where we are going to have to grapple with the problems that men have been trying to grapple with through history, but the demands didn't force them to do it. Survival demands that we grapple with them. Men, for years now, have been talking about war and peace. But now, no longer can they just talk about it. It is no longer a choice between violence and nonviolence in this world; it's nonviolence or nonexistence. That is where we are today.And also in the human rights revolution, if something isn't done, and done in a hurry, to bring the colored peoples of the world out oftheir long years of poverty, their long years of hurt and neglect, the whole world is doomed. Now, I'm just happy that God has allowed me to live in this period to see what is unfolding. And I'm happy that He's allowed me to be in Memphis.I can remember -- I can remember when Negroes were just going around as Ralph has said, so often, scratching where they didn't itch, and laughing when they were not tickled. But that day is all over. We mean business now, and we are determined to gain our rightful place in God's world.And that's all this whole thing is about. We aren't engaged in any negative protest and in any negative arguments with anybody. We are saying that we are determined to be men. We are determined to be people. We are saying -- We are saying that we are God's children. And that we are God's children, we don't have to live like we are forced to live.Now, what does all of this mean in this great period of history? It means that we've got to stay together. We've got to stay together and maintain unity. You know, whenever Pharaoh wanted to prolong the period of slavery in Egypt, he had a favorite, favorite formula for doing it. What was that? He kept the slaves fighting among themselves. But whenever the slaves get together, something happens in Pharaoh's court, and he cannot hold the slaves in slavery. When the slaves get together,that's the beginning of getting out of slavery. Now let us maintain unity.Secondly, let us keep the issues where they are. The issue is injustice. The issue is the refusal of Memphis to be fair and honest in its dealings with its public servants, who happen to be sanitation workers. Now, we've got to keep attention on that. That's always the problem with a little violence. You know what happened the other day, and the press dealt only with the window-breaking. I read the articles. They very seldom got around to mentioning the fact that one thousand, three hundred sanitation workers are on strike, and that Memphis is not being fair to them, and that Mayor Loeb is in dire need of a doctor. They didn't get around to that.Now we're going to march again, and we've got to march again, in order to put the issue where it is supposed to be -- and force everybody to see that there are thirteen hundred of God's children here suffering, sometimes going hungry, going through dark and dreary nights wondering how this thing is going to come out. That's the issue. And we've got to say to the nation: We know how it's coming out. For when people get caught up with that which is right and they are willing to sacrifice for it, there is no stopping point short of victory.We aren't going to let any mace stop us. We are masters in our nonviolent movement in disarming police forces; they don't know what to do. I've seen them so often. I remember in Birmingham, Alabama,when we were in that majestic struggle there, we would move out of the 16th Street Baptist Church day after day; by the hundreds we would move out. And Bull Connor would tell them to send the dogs forth, and they did come; but we just went before the dogs singing, "Ain't gonna let nobody turn me around."Bull Connor next would say, "Turn the fire hoses on." And as I said to you the other night, Bull Connor didn't know history. He knew a kind of physics that somehow didn't relate to the transphysics that we knew about. And that was the fact that there was a certain kind of fire that no water could put out. And we went before the fire hoses; we had known water. If we were Baptist or some other denominations, we had been immersed. If we were Methodist, and some others, we had been sprinkled, but we knew water. That couldn't stop us.And we just went on before the dogs and we would look at them; and we'd go on before the water hoses and we would look at it, and we'd just go on singing "Over my head I see freedom in the air." And then we would be thrown in the paddy wagons, and sometimes we were stacked in there like sardines in a can. And they would throw us in, and old Bull would say, "Take 'em off," and they did; and we would just go in the paddy wagon singing, "We Shall Overcome." And every now and then we'd get in jail, and we'd see the jailers looking through the windows being moved by our prayers, and being moved by our words and oursongs. And there was a power there which Bull Connor couldn't adjust to; and so we ended up transforming Bull into a steer, and we won our struggle in Birmingham. Now we've got to go on in Memphis just like that. I call upon you to be with us when we go out Monday.Now about injunctions: We have an injunction and we're going into court tomorrow morning to fight this illegal, unconstitutional injunction. All we say to America is, "Be true to what you said on paper." If I lived in China or even Russia, or any totalitarian country, maybe I could understand some of these illegal injunctions. Maybe I could understand the denial of certain basic First Amendment privileges, because they hadn't committed themselves to that over there. But somewhere I read of the freedom of assembly. Somewhere I read of the freedom of speech. Somewhere I read of the freedom of press. Somewhere I read that the greatness of America is the right to protest for right. And so just as I say, we aren't going to let dogs or water hoses turn us around, we aren't going to let any injunction turn us around. We are going on.We need all of you. And you know what's beautiful to me is to see all of these ministers of the Gospel. It's a marvelous picture. Who is it that is supposed to articulate the longings and aspirations of the people more than the preacher? Somehow the preacher must have a kind of fire shut up in his bones. And whenever injustice is around he tell it. Somehow the preacher must be an Amos, and saith, "When God speakswho can but prophesy?" Again with Amos, "Let justice roll down like waters and righteousness like a mighty stream." Somehow the preacher must say with Jesus, "The Spirit of the Lord is upon me, because he hath anointed me," and he's anointed me to deal with the problems of the poor."And I want to commend the preachers, under the leadership of these noble men: James Lawson, one who has been in this struggle for many years; he's been to jail for struggling; he's been kicked out of Vanderbilt University for this struggle, but he's still going on, fighting for the rights of his people. Reverend Ralph Jackson, Billy Kiles; I could just go right on down the list, but time will not permit. But I want to thank all of them. And I want you to thank them, because so often, preachers aren't concerned about anything but themselves. And I'm always happy to see a relevant ministry.It's all right to talk about "long white robes over yonder," in all of its symbolism. But ultimately people want some suits and dresses and shoes to wear down here! It's all right to talk about "streets flowing with milk and honey," but God has commanded us to be concerned about the slums down here, and his children who can't eat three square meals a day. It's all right to talk about the new Jerusalem, but one day, God's preacher must talk about the new New York, the new Atlanta, the new Philadelphia, the new Los Angeles, the new Memphis, Tennessee. This iswhat we have to do.Now the other thing we'll have to do is this: Always anchor our external direct action with the power of economic withdrawal. Now, we are poor people. Individually, we are poor when you compare us with white society in America. We are poor. Never stop and forget that collectively -- that means all of us together -- collectively we are richer than all the nations in the world, with the exception of nine. Did you ever think about that? After you leave the United States, Soviet Russia, Great Britain, West Germany, France, and I could name the others, the American Negro collectively is richer than most nations of the world. We have an annual income of more than thirty billion dollars a year, which is more than all of the exports of the United States, and more than the national budget of Canada. Did you know that? That's power right there, if we know how to pool it.We don't have to argue with anybody. We don't have to curse and go around acting bad with our words. We don't need any bricks and bottles. We don't need any Molotov cocktails. We just need to go around to these stores, and to these massive industries in our country, and say, "God sent us by here, to say to you that you're not treating his children right. And we've come by here to ask you to make the first item on your agenda fair treatment, where God's children are concerned. Now, if you are not prepared to do that, we do have an agenda that we must follow.And our agenda calls for withdrawing economic support from you."And so, as a result of this, we are asking you tonight, to go out and tell your neighbors not to buy Coca-Cola in Memphis. Go by and tell them not to buy Sealtest milk. Tell them not to buy -- what is the other bread? -- Wonder Bread. And what is the other bread company, Jesse? Tell them not to buy Hart's bread. As Jesse Jackson has said, up to now, only the garbage men have been feeling pain; now we must kind of redistribute the pain. We are choosing these companies because they haven't been fair in their hiring policies; and we are choosing them because they can begin the process of saying they are going to support the needs and the rights of these men who are on strike. And then they can move on town -- downtown and tell Mayor Loeb to do what is right.But not only that, we've got to strengthen black institutions. I call upon you to take your money out of the banks downtown and deposit your money in Tri-State Bank. We want a "bank-in" movement in Memphis. Go by the savings and loan association. I'm not asking you something that we don't do ourselves at SCLC. Judge Hooks and others will tell you that we have an account here in the savings and loan association from the Southern Christian Leadership Conference. We are telling you to follow what we are doing. Put your money there. You have six or seven black insurance companies here in the city of Memphis. Take out your insurance there. We want to have an "insurance-in."Now these are some practical things that we can do. We begin the process of building a greater economic base. And at the same time, we are putting pressure where it really hurts. I ask you to follow through here.Now, let me say as I move to my conclusion that we've got to give ourselves to this struggle until the end. Nothing would be more tragic than to stop at this point in Memphis. We've got to see it through. And when we have our march, you need to be there. If it means leaving work, if it means leaving school -- be there. Be concerned about your brother. You may not be on strike. But either we go up together, or we go down together.Let us develop a kind of dangerous unselfishness. One day a man came to Jesus, and he wanted to raise some questions about some vital matters of life. At points he wanted to trick Jesus, and show him that he knew a little more than Jesus knew and throw him off base....Now that question could have easily ended up in a philosophical and theological debate. But Jesus immediately pulled that question from mid-air, and placed it on a dangerous curve between Jerusalem and Jericho. And he talked about a certain man, who fell among thieves. You remember that a Levite and a priest passed by on the other side. They didn't stop to help him. And finally a man of another race came by. He got down from his beast, decided not to be compassionate by proxy. Buthe got down with him, administered first aid, and helped the man in need. Jesus ended up saying, this was the good man, this was the great man, because he had the capacity to project the "I" into the "thou," and to be concerned about his brother.Now you know, we use our imagination a great deal to try to determine why the priest and the Levite didn't stop. At times we say they were busy going to a church meeting, an ecclesiastical gathering, and they had to get on down to Jerusalem so they wouldn't be late for their meeting. At other times we would speculate that there was a religious law that "One who was engaged in religious ceremonials was not to touch a human body twenty-four hours before the ceremony." And every now and then we begin to wonder whether maybe they were not going down to Jerusalem -- or down to Jericho, rather to organize a "Jericho Road Improvement Association." That's a possibility. Maybe they felt that it was better to deal with the problem from the causal root, rather than to get bogged down with an individual effect.But I'm going to tell you what my imagination tells me. It's possible that those men were afraid. You see, the Jericho road is a dangerous road. I remember when Mrs. King and I were first in Jerusalem. We rented a car and drove from Jerusalem down to Jericho. And as soon as we got on that road, I said to my wife, "I can see why Jesus used this as the setting for his parable." It's a winding, meandering road. It's reallyconducive for ambushing. You start out in Jerusalem, which is about 1200 miles -- or rather 1200 feet above sea level. And by the time you get down to Jericho, fifteen or twenty minutes later, you're about 2200 feet below sea level. That's a dangerous road. In the days of Jesus it came to be known as the "Bloody Pass." And you know, it's possible that the priest and the Levite looked over that man on the ground and wondered if the robbers were still around. Or it's possible that they felt that the man on the ground was merely faking. And he was acting like he had been robbed and hurt, in order to seize them over there, lure them there for quick and easy seizure. And so the first question that the priest asked -- the first question that the Levite asked was, "If I stop to help this man, what will happen to me?" But then the Good Samaritan came by. And he reversed the question: "If I do not stop to help this man, what will happen to him?"That's the question before you tonight. Not, "If I stop to help the sanitation workers, what will happen to my job. Not, "If I stop to help the sanitation workers what will happen to all of the hours that I usually spend in my office every day and every week as a pastor?" The question is not, "If I stop to help this man in need, what will happen to me?" The question is, "If I do not stop to help the sanitation workers, what will happen to them?" That's the question.Let us rise up tonight with a greater readiness. Let us stand with agreater determination. And let us move on in these powerful days, these days of challenge to make America what it ought to be. We have an opportunity to make America a better nation. And I want to thank God, once more, for allowing me to be here with you.You know, several years ago, I was in New York City autographing the first book that I had written. And while sitting there autographing books, a demented black woman came up. The only question I heard from her was, "Are you Martin Luther King?" And I was looking down writing, and I said, "Yes." And the next minute I felt something beating on my chest. Before I knew it I had been stabbed by this demented woman. I was rushed to Harlem Hospital. It was a dark Saturday afternoon. And that blade had gone through, and the X-rays revealed that the tip of the blade was on the edge of my aorta, the main artery. And once that's punctured, your drowned in your own blood -- that's the end of you.It came out in the New York Times the next morning, that if I had merely sneezed, I would have died. Well, about four days later, they allowed me, after the operation, after my chest had been opened, and the blade had been taken out, to move around in the wheel chair in the hospital. They allowed me to read some of the mail that came in, and from all over the states and the world, kind letters came in. I read a few, but one of them I will never forget. I had received one from the Presidentand the Vice-President. I've forgotten what those telegrams said. I'd received a visit and a letter from the Governor of New York, but I've forgotten what that letter said. But there was another letter that came from a little girl, a young girl who was a student at the White Plains High School. And I looked at that letter, and I'll never forget it. It said simply, Dear Dr. King,I am a ninth-grade student at the White Plains High School."And she said,While it should not matter, I would like to mention that I'm a white girl. I read in the paper of your misfortune, and of your suffering. And I read that if you had sneezed, you would have died. And I'm simply writing you to say that I'm so happy that you didn't sneeze.And I want to say tonight -- I want to say tonight that I too am happy that I didn't sneeze. Because if I had sneezed, I wouldn't have been around here in 1960, when students all over the South started sitting-in at lunch counters. And I knew that as they were sitting in, they were really standing up for the best in the American dream, and taking the whole nation back to those great wells of democracy which were dug deep by the Founding Fathers in the Declaration of Independence and the Constitution.If I had sneezed, I wouldn't have been around here in 1961, when we decided to take a ride for freedom and ended segregation ininter-state travel.If I had sneezed, I wouldn't have been around here in 1962, when Negroes in Albany, Georgia, decided to straighten their backs up. And whenever men and women straighten their backs up, they are going somewhere, because a man can't ride your back unless it is bent.If I had sneezed -- If I had sneezed I wouldn't have been here in 1963, when the black people of Birmingham, Alabama, aroused the conscience of this nation, and brought into being the Civil Rights Bill.If I had sneezed, I wouldn't have had a chance later that year, in August, to try to tell America about a dream that I had had.If I had sneezed, I wouldn't have been down in Selma, Alabama, to see the great Movement there.If I had sneezed, I wouldn't have been in Memphis to see a community rally around those brothers and sisters who are suffering.I'm so happy that I didn't sneeze.And they were telling me --. Now, it doesn't matter, now. It really doesn't matter what happens now. I left Atlanta this morning, and as we got started on the plane, there were six of us. The pilot said over the public address system, "We are sorry for the delay, but we have Dr. Martin Luther King on the plane. And to be sure that all of the bags were checked, and to be sure that nothing would be wrong with on the plane, we had to check out everything carefully. And we've had the planeprotected and guarded all night."And then I got into Memphis. And some began to say the threats, or talk about the threats that were out. What would happen to me from some of our sick white brothers?Well, I don't know what will happen now. We've got some difficult days ahead. But it really doesn't matter with me now, because I've been to the mountaintop.And I don't mind.Like anybody, I would like to live a long life. Longevity has its place. But I'm not concerned about that now. I just want to do God's will. And He's allowed me to go up to the mountain. And I've looked over. And I've seen the Promised Land. I may not get there with you. But I want you to know tonight, that we, as a people, will get to the promised land!mlkmountaintop3.JPGAnd so I'm happy, tonight.I'm not worried about anything.I'm not fearing any man!Mine eyes have seen the glory of the coming of the Lord!。

halcon 拉普拉斯算子参数

halcon 拉普拉斯算子参数

halcon 拉普拉斯算子参数Halcon 拉普拉斯算子参数引言Halcon是一款功能强大的工业视觉软件,广泛应用于机器视觉领域。

在Halcon中,拉普拉斯算子是一种常用的边缘检测算法。

本文将介绍Halcon中拉普拉斯算子的参数及其作用,帮助读者更好地理解和应用该算法。

一、拉普拉斯算子概述拉普拉斯算子是一种二阶微分算子,用于检测图像中的边缘。

它通过计算像素周围的灰度值差异来确定边缘的位置和方向。

在Halcon 中,拉普拉斯算子可以通过设置不同的参数来调整边缘检测的效果。

二、拉普拉斯算子的参数在Halcon中,拉普拉斯算子的参数包括模板类型、平滑参数和尺度参数。

下面将逐一介绍这些参数及其作用。

1. 模板类型模板类型是指用于计算像素周围灰度值差异的模板形状。

Halcon提供了多种模板类型供用户选择,包括3x3、5x5、7x7等。

较小的模板可以检测到细小的边缘,而较大的模板可以检测到更粗的边缘。

2. 平滑参数平滑参数用于控制图像在进行边缘检测前的平滑程度。

通过对图像进行平滑处理,可以减少噪声对边缘检测结果的影响。

Halcon中的平滑参数可以设置为0、1、2或3,分别对应不进行平滑、进行一次平滑、进行两次平滑和进行三次平滑。

3. 尺度参数尺度参数用于指定边缘检测的灵敏度。

较小的尺度参数可以检测到较细的边缘,而较大的尺度参数可以检测到较粗的边缘。

Halcon中的尺度参数可以设置为1、2或3,分别对应低灵敏度、中等灵敏度和高灵敏度。

三、拉普拉斯算子的应用拉普拉斯算子在机器视觉领域有着广泛的应用。

它可以用于边缘检测、形状分析、物体定位等任务。

在实际应用中,根据具体的需求和图像特点,可以通过调整拉普拉斯算子的参数来达到最佳的边缘检测效果。

例如,当需要检测细小的边缘时,可以选择较小的模板类型和较小的尺度参数;当需要检测粗大的边缘时,可以选择较大的模板类型和较大的尺度参数。

通过调整平滑参数,可以平衡边缘检测的效果和噪声的抑制程度。

机器视觉之halcon学习——机器视觉工程应用的开发思路

机器视觉之halcon学习——机器视觉工程应用的开发思路

halcon学习笔记——机器视觉工程应用的开发思路机器视觉工程应用主要可划分为硬件和软件两大部分。

硬件:工程应用的第一步就是硬件选型。

硬件选型很关键,因为它是你后面工作的基础。

主要是光源、工业相机和镜头选择。

软件:目前业内商业库主要有Halcon,康耐视,DALSA,evision,NI等,开源库有Ope nCV.其中NI的labview+vision模块。

机器视觉工程应用的基本开发思路是:一、图像采集,二、图像分割,三、形态学处理,四、特征提取,五、输出结果。

下面在Halcon下对这四个步骤进行讲解。

一、图像采集:Halcon通过imageacquisition interfaces对各种图像采集卡及各种工业相机进行支持。

其中包括:模拟视频信号,数字视频信号Camera Link,数字视频信号IEEE 1394,数字视频信号USB2.0,数字视频信号Gigabit Ethernet等。

Halcon通过统一的接口封装上述不同相机的image acquisition interfaces,从而达到算子统一化。

不同的相机只需更改几个参数就可变更使用。

Halcon图像获取的思路:1、打开设备,获得该设备的句柄。

2、调用采集算子,获取图像。

1、打开设备,获得该设备的句柄。

2、调用采集算子,获取图像。

图像采集其他相关算子:grab_image_start,该算子开始命令相机进行异步采集。

只能与grab_image_async (异步采集)一起使用。

例子:3、相机参数读写读取相机参数:info_framegrabber( : : Name, Query : Information, ValueList)写相机参数:set_framegrabber_param( : : AcqHandle, Param, Value : )二、图像分割:图像分割的定义:所谓图像分割是指将图像中具有特殊含义的不同区域分割开来,这些区域是互相不交叉的,每个区域都满足特定区域的一致性。

Halcon学习(五)获取特征点

Halcon学习(五)获取特征点

Halcon学习(五)获取特征点这个例程是要检查图中焊接点,并获取焊接点的直径。

处理过程:首先,分离比较明亮的区域,然后将找出来的结果,转换成最小的平行矩形,即获得了图像处理的ROI。

这里采用了阈值分割:将图像中的灰度值处于某一指定灰度值范围内全部点选到输出区域中。

threshold (Bond, Bright, 100, 255) 然后,在ROI区域内选择比较暗的区域,移除不适合的区域(利用形状,面积等参数),把物体抽出变成一个独立的物,找出圆形物体,并且排列物体即可。

程序如下:dev_close_window ()dev_open_window(0, 0, -1, -1, 'black', WindowID)read_image(Die, 'E:/halcon图像/die_03.png')dev_display(Die)threshold(Die, Brightregion,100,255)shape_trans(Brightregion, ROI, 'rectangle2')reduce_domain(Die, ROI, DieROI)threshold(DieROI, RawSegmentation,0,50)fill_up_shape(RawSegmentation, Wires, 'area', 1, 100) opening_circle(Wires, BallRegion, 15.5)connection(BallRegion, Balls)select_shape(Balls, FinalBalls, 'circularity', 'and', 0.85, 1.0) count_obj(FinalBalls,NumBalls)smallest_circle(FinalBalls, Row, Column, Radius) meanRadius := sum(Radius)/|Radius|area_center(FinalBalls, Area, RowCenter, Colcenter) minArea := min(Area)disp_circle(WindowID, Row, Column, Radius)所用到的算子如下:threshold(Image : Region : MinGray, MaxGray : )阈值处理算子,MinGray <= g <= MaxGray,halcon软件将g 所在的范围变成红色。

halcon 旋转区域算子

halcon 旋转区域算子

Halcon 旋转区域算子1. 简介Halcon是一种广泛应用于机器视觉领域的软件开发工具,提供了丰富的图像处理和分析功能。

旋转区域算子是其中之一,用于对图像中的区域进行旋转操作。

在机器视觉应用中,经常需要对图像中的目标进行定位、测量和识别。

然而,由于目标在图像中的姿态可能会发生变化,需要将其旋转到特定的角度以便进行后续处理。

这时就可以使用Halcon提供的旋转区域算子来实现。

2. 原理旋转区域算子基于仿射变换原理,在数学上可以表示为:x' = cos(theta) * (x - center_x) - sin(theta) * (y - center_y) + center_xy' = sin(theta) * (x - center_x) + cos(theta) * (y - center_y) + center_y其中(x, y)是原始坐标,(x', y')是旋转后的坐标,theta是旋转角度,(center_x, center_y)是旋转中心。

通过将每个点都进行相应的坐标变换,就可以实现对整个区域进行旋转操作。

3. 使用方法3.1 创建旋转区域要使用旋转区域算子,首先需要创建一个待旋转的区域。

可以通过多种方式创建,例如使用二值化算子、边缘检测算子等。

read_image(Image, 'image.jpg')threshold(Image, Region, 128, 255)上述代码中,read_image函数用于读取图像,threshold函数用于将图像二值化,并将结果保存到Region变量中。

3.2 旋转区域创建好待旋转的区域后,就可以使用旋转区域算子对其进行旋转操作。

rotate_region(Region, RotatedRegion, CenterRow, CenterColumn, Angle)上述代码中,rotate_region函数接受五个参数:原始区域Region、输出的旋转后的区域RotatedRegion、旋转中心的行坐标CenterRow、旋转中心的列坐标CenterColumn和旋转角度Angle。

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H a l c o n算子--区域特征
当我们想要提取Region时,图像处理后,往往存在几个类似的Region,此时,需要根据Region的一
些特殊特征,来选择指定的Region。

求Region指定特征值:region_features(Regions : : Features : Value)
根据特征值选择区域:select_shape(Regions : SelectedRegions : Features, Operation, Min,
Max : )
Region特征一览:
特征英译备注area Area of the object 对象的面积
row Row index of the center 中心点的行坐标
column Column index of the center 中心点的列坐标
width Width of the region 区域的宽度
height Height of the region 区域的高度
row1 Row index of upper left corner 左上角行坐标
column1 Column index of upper left corner 左上角列坐标
row2 Row index of lower right corner 右下角行坐标
column2 Column index of lower right corner 右下角列坐标
circularity Circularity 圆度0~1 compactness Compactness 紧密度0~1 contlength Total length of contour 轮廓线总长
convexity Convexity 凸性
rectangularity Rectangularity 矩形度0~1 ra Main radius of the equivalent ellipse 等效椭圆长轴半径长度
rb Secondary radius of the equivalent ellipse 等效椭圆短轴半径长度
phi Orientation of the equivalent ellipse 等效椭圆方向
anisometry Anisometry 椭圆参数,Ra/Rb长轴与短轴的比值
bulkiness Bulkiness 椭圆参数,蓬松度π*Ra*Rb/A
struct_factor Structur Factor? 椭圆参数,
Anisometry*Bulkiness-1
outer_radius Radius of smallest surrounding circle 最小外接圆半径inner_radius Radius of largest inner circle 最大内接圆半径
inner_width Width of the largest axis-parallel rectangle that
fits into the region
最大内接矩形宽度
inner_height Height of the largest axis-parallel rectangle
that fits into the region
最大内接矩形高度
dist_mean Mean distance from the region border to the
center
区域边界到中心的平均距离
dist_deviation Deviation of the distance from the region
border from the center
区域边界到中心距离的偏差
roundness Roundness 圆度,与circularity计算方法不同num_sides Number of polygon sides 多边形边数
connect_num Number of connection components 连通数
holes_num Number of holes 区域内洞数
area_holes Area of the holes of the object 所有洞的面积
max_diameter Maximum diameter of the region 最大直径
orientation Orientation of the region 区域方向
euler_number Euler number 欧拉数,即连通数和洞数的差
rect2_phi Orientation of the smallest surrounding
rectangle
最小外接矩形的方向
rect2_len1 Half the length of the smallest surrounding
rectangle
最小外接矩形长度的一半??smalle
rect2_len2 Half the width of the smallest surrounding
rectangle
最小外接矩形宽度的一半
moments_m11 Geometric moments of the region 几何矩moments_m20 Geometric moments of the region 几何矩moments_m02 Geometric moments of the region 几何矩moments_ia Geometric moments of the region 几何矩moments_ib Geometric moments of the region 几何矩moments_m11_invar Geometric moments of the region 几何矩moments_m20_invar Geometric moments of the region 几何矩moments_m02_invar Geometric moments of the region 几何矩
moments_phi1 Geometric moments of the region 几何矩moments_phi2 Geometric moments of the region 几何矩moments_m21 Geometric moments of the region 几何矩moments_m12 Geometric moments of the region 几何矩moments_m03 Geometric moments of the region 几何矩moments_m30 Geometric moments of the region 几何矩moments_m21_invar Geometric moments of the region 几何矩moments_m12_invar Geometric moments of the region 几何矩moments_m03_invar Geometric moments of the region 几何矩moments_m30_invar Geometric moments of the region 几何矩moments_i1 Geometric moments of the region 几何矩moments_i2 Geometric moments of the region 几何矩moments_i3 Geometric moments of the region 几何矩moments_i4 Geometric moments of the region 几何矩moments_psi1 Geometric moments of the region 几何矩moments_psi2 Geometric moments of the region 几何矩moments_psi3 Geometric moments of the region 几何矩moments_psi4 Geometric moments of the region 几何矩。

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