Imatesttrainingclass12013
合集下载
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
– Sharpness – Tonal response and dynamic range – Color accuracy
• Started work July 2019. Released v1.0 September 2019.
• Consists of several modules that analyze images of standard and custom targets.
Image quality factors – Summary
Example – SFRplus module
The Imatest Lab
Equipment and Setup Photographing Imatest charts
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-8
Feb. 2019
Other analysis modules
Module
Colorcheck, Multicharts
Image quality factor Noise
Color accuracy
Stepchart,
Dynamic Range
Uniformity,
Uniformity-Interactive
EXE or DLL versions
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-4
Part 1: Contents
Imatest introduction • Background/history • Product lineup • Module summary and workflow • Basic image concepts • Sharpness introduction • Raw files & raw conversion • Image quality factors
• Screen Patterns:
Displays a large variety of test patterns on flat screen monitors.
• View/Rename files: Rename files using EXIF data
(adds Aperture, ISO speed, shutter speed, etc.).
• Imatest Studio: Everything an individual photographer needs
to test cameras and lenses. Only sold to individual photographers.
• Gamutvision (separate program): Analyze the
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-9
Utility modules 1
• Test Charts:
Create bitmap or Scalable Vector Graphics test charts. Printing skill required.
Loss in detail due to software
noise reduction
(Rescharts modules have a highly interactive interfass Norman Koren imatest ©2019-2019, Imatest LLC
• Colorcheck – Multicharts
• Distortion
• Uniformity – UniformityInteractive – Blemish Detect
• Sharpness measurements: SFR – Batchview – MTF Compare – Sharpening – Slanted-edge – SQF/Acutance
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-10
Utility modules 2
• Find sharpest files:
Find the sharpest file in a group of files taken of a similar image. Sharpness metrics are not standard– for comparisononly.
Log Frequency
(Rescharts)
Lateral chromatic aberration
Noise
Contrast (gamma)
Log F-Contrast
(Rescharts)
Color moiré
Wedge
(Rescharts)
Random/Dead . Leaves (Rescharts)
Tonal response and contrast
Dynamic range
Exposure accuracy
Blemish Detect
Distortion, Dot Pattern
SFRplus
ISO Sensitivity Light falloff
Lens distortion Sensor defects
Imatest: Course outline 1
Imatest LLC Boulder, Colorado
imatest com
Background
History – Products/Modules – Workflow
Basic image concepts
Sharpness – gamma – color space – Raw images & demosaicing
• 8 bits (one byte; 24-bit color), or • 16 bits (two bytes; 48 bit color).
Standard file formats: TIF, BMP (usually uncompressed), JPG (lossy compression; size, quality selectable), PNG (lossless compression)
correlate color with pixel location.
• EXIF: View detailed image file EXIF data.
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-5
Imatest: Background
• Created to enable photographers to test lenses and cameras.
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-3
Imatest: Course outline 3
Imatest modules (by module)
• SFRplus
• Stepchart – Dynamic range
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-6
Imatest: Product lineup
• Imatest Master: Full featured version for imaging system
• Compiled in Matlab, includes runtime library in installer package (Matlab not required)
• Frequent enhancements applied to the Beta version (now 3.10-Beta).
• dcraw: Front end to dcraw raw converter. Can
demosaic images (with minimal processing) or create Bayer raw images.
• Rawview: Displays Bayer raw images. Lets you
• Rescharts: SFR – SFRplus – Star – Log F – Log FContrast – Wedge – Random – Any scene sharpness
Industrial Testing (IT) Non-GUI modules for industrial testing.
P. I-2
Imatest: Course outline 2
Imatest settings
• ini file for settings • Options and menus
Common operations – File & ROI
selection, dialog boxes, saving results
P. I-7
Feb. 2019
Sharpness modules
Module
SFR, SFRplus
(Spatial frequency response)
Image quality factor Sharpness (MTF)
(Standard or Rescharts)
Star Chart
(Rescharts)
response, color gamut, and gamut mapping behavior of ICC profiles. Shown on right.
Feb. 2019
Gamutvision 3D L*a*b* color gamut
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
• Imatest IT: Non-GUI (Graphics User Interface) DOS-callable
EXE and DLL programs for automated testing & quality control. Now implemented on production lines.
P. I-11
Images, image files, and concepts
An image is a m x n x k array.
• m rows (height in pixels). • n columns (width in pixels). • k = 1 for monochrome; 3 for color. • each pixel may be
developers. For corporate/business users.
• Imatest IS (Image Sensor): Interfaces directly to
manufacturer’s development systems. Allows realtime updates.
Imatest modules (outline)
• Introduction • Key image quality factors: detailed • Instructions
• Region selection and input options • Output– describe displays. • Live demonstration/exercise
• Started work July 2019. Released v1.0 September 2019.
• Consists of several modules that analyze images of standard and custom targets.
Image quality factors – Summary
Example – SFRplus module
The Imatest Lab
Equipment and Setup Photographing Imatest charts
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-8
Feb. 2019
Other analysis modules
Module
Colorcheck, Multicharts
Image quality factor Noise
Color accuracy
Stepchart,
Dynamic Range
Uniformity,
Uniformity-Interactive
EXE or DLL versions
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-4
Part 1: Contents
Imatest introduction • Background/history • Product lineup • Module summary and workflow • Basic image concepts • Sharpness introduction • Raw files & raw conversion • Image quality factors
• Screen Patterns:
Displays a large variety of test patterns on flat screen monitors.
• View/Rename files: Rename files using EXIF data
(adds Aperture, ISO speed, shutter speed, etc.).
• Imatest Studio: Everything an individual photographer needs
to test cameras and lenses. Only sold to individual photographers.
• Gamutvision (separate program): Analyze the
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-9
Utility modules 1
• Test Charts:
Create bitmap or Scalable Vector Graphics test charts. Printing skill required.
Loss in detail due to software
noise reduction
(Rescharts modules have a highly interactive interfass Norman Koren imatest ©2019-2019, Imatest LLC
• Colorcheck – Multicharts
• Distortion
• Uniformity – UniformityInteractive – Blemish Detect
• Sharpness measurements: SFR – Batchview – MTF Compare – Sharpening – Slanted-edge – SQF/Acutance
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-10
Utility modules 2
• Find sharpest files:
Find the sharpest file in a group of files taken of a similar image. Sharpness metrics are not standard– for comparisononly.
Log Frequency
(Rescharts)
Lateral chromatic aberration
Noise
Contrast (gamma)
Log F-Contrast
(Rescharts)
Color moiré
Wedge
(Rescharts)
Random/Dead . Leaves (Rescharts)
Tonal response and contrast
Dynamic range
Exposure accuracy
Blemish Detect
Distortion, Dot Pattern
SFRplus
ISO Sensitivity Light falloff
Lens distortion Sensor defects
Imatest: Course outline 1
Imatest LLC Boulder, Colorado
imatest com
Background
History – Products/Modules – Workflow
Basic image concepts
Sharpness – gamma – color space – Raw images & demosaicing
• 8 bits (one byte; 24-bit color), or • 16 bits (two bytes; 48 bit color).
Standard file formats: TIF, BMP (usually uncompressed), JPG (lossy compression; size, quality selectable), PNG (lossless compression)
correlate color with pixel location.
• EXIF: View detailed image file EXIF data.
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-5
Imatest: Background
• Created to enable photographers to test lenses and cameras.
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-3
Imatest: Course outline 3
Imatest modules (by module)
• SFRplus
• Stepchart – Dynamic range
Feb. 2019
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
P. I-6
Imatest: Product lineup
• Imatest Master: Full featured version for imaging system
• Compiled in Matlab, includes runtime library in installer package (Matlab not required)
• Frequent enhancements applied to the Beta version (now 3.10-Beta).
• dcraw: Front end to dcraw raw converter. Can
demosaic images (with minimal processing) or create Bayer raw images.
• Rawview: Displays Bayer raw images. Lets you
• Rescharts: SFR – SFRplus – Star – Log F – Log FContrast – Wedge – Random – Any scene sharpness
Industrial Testing (IT) Non-GUI modules for industrial testing.
P. I-2
Imatest: Course outline 2
Imatest settings
• ini file for settings • Options and menus
Common operations – File & ROI
selection, dialog boxes, saving results
P. I-7
Feb. 2019
Sharpness modules
Module
SFR, SFRplus
(Spatial frequency response)
Image quality factor Sharpness (MTF)
(Standard or Rescharts)
Star Chart
(Rescharts)
response, color gamut, and gamut mapping behavior of ICC profiles. Shown on right.
Feb. 2019
Gamutvision 3D L*a*b* color gamut
Imatest 2 day class Norman Koren imatest ©2019-2019, Imatest LLC
• Imatest IT: Non-GUI (Graphics User Interface) DOS-callable
EXE and DLL programs for automated testing & quality control. Now implemented on production lines.
P. I-11
Images, image files, and concepts
An image is a m x n x k array.
• m rows (height in pixels). • n columns (width in pixels). • k = 1 for monochrome; 3 for color. • each pixel may be
developers. For corporate/business users.
• Imatest IS (Image Sensor): Interfaces directly to
manufacturer’s development systems. Allows realtime updates.
Imatest modules (outline)
• Introduction • Key image quality factors: detailed • Instructions
• Region selection and input options • Output– describe displays. • Live demonstration/exercise