多尺度分割原理与应用
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Hierarchical SegmHeSnegtation
Reading Report
CONTENTS
PART ONE
PART TWO
PART THREE
About the Introduction. The Hseg Segmentation. Application in ENVI.
1 PART OAbNouEt the In来自百度文库roduction.
➢with a limited training set, beyond a certain limit,
Introduction
How to build accurate classifiers for hyperspectral images?
➢SVMs perform a nonlinear pixel-wise classification based on the full spectral information which is robust to the spectral dimension of hyperspectral images.
➢the rate of convergence of the statistical estimation decreases when the dimension grows while conjointly the number of parameters to estimate increases, making the estimation of the model parameters very difficult.
The Hseg Segmentation The HSeg algorithm is a segmentation technique combining region growing, using the hierarchical stepwise optimization (HSWO) mIneittihaolidza, twiohni:chInpitrioadliuzceetshsepsaetgiamlleynctaotnionnecbteyd raesgsiigonnisn,gweitahchunpsiuxpeleravriesegdiocnlalassbiefli.caIftiaon, that gprroesuepgsmtoegnetathtieornsiismpilraorvsidpeadti,allalybedlisejaocihntpixel raecgcioorndsin. Tglhye. Oaltghoerriwthimse,claanbebleesaucmhmpiaxreizleads aas fsoepllaorwatse. region.
Highlight the importance of spectral–spatial strategies for the accurate classification of hyperspectral images and validate the proposed methods.
Introduction
Advantages of hyperspectral remote sensor technology:
➢The detailed spectral information increases the possibility of more accurately discriminating materials of interest.
But,it also brings some problem: the Curse of ➢DiTmheenfsiinoenaspliatytiaalnrdesthoeluntieoendofforthsepesecinfsicorsspeencatrballe–s sptahteiaal ncalalysssiifsieorfss. mall spatial structures in the image. ➢Many operational imaging systems are currently
PS: ➢Use advanced morphological filters as an 鲁棒alt性ern(Ratoivbeuswt)a:y即o系f p统er的for健mi壮ng性jo，in是t c在las异sif常ica和tio危n.
Introduction
2 PART TThWe HOseg Segmentation.
Abstract
Recent advances in spectral–spatial classification of hyperspectral images are presented in this paper. Several techniques are investigated for combining both spatial and spectral information.
available providing a large amount of images for PSv: arious thematic applications.
维数灾难(Curse of Dimensionality):通常是指在涉
Introduction
The Curse of Dimensionality of hyperspectral remote sensor technology :
➢In high-dimensional spaces, normally distributed data have a tendency to concentrate in the tails, which seems to be contradictory with its bellshaped density function.
➢Iterative statistical classifier based on Markov random field (MRF) modeling. Note that recently adaptive MRF have been introduced in remote sensing.
Reading Report
CONTENTS
PART ONE
PART TWO
PART THREE
About the Introduction. The Hseg Segmentation. Application in ENVI.
1 PART OAbNouEt the In来自百度文库roduction.
➢with a limited training set, beyond a certain limit,
Introduction
How to build accurate classifiers for hyperspectral images?
➢SVMs perform a nonlinear pixel-wise classification based on the full spectral information which is robust to the spectral dimension of hyperspectral images.
➢the rate of convergence of the statistical estimation decreases when the dimension grows while conjointly the number of parameters to estimate increases, making the estimation of the model parameters very difficult.
The Hseg Segmentation The HSeg algorithm is a segmentation technique combining region growing, using the hierarchical stepwise optimization (HSWO) mIneittihaolidza, twiohni:chInpitrioadliuzceetshsepsaetgiamlleynctaotnionnecbteyd raesgsiigonnisn,gweitahchunpsiuxpeleravriesegdiocnlalassbiefli.caIftiaon, that gprroesuepgsmtoegnetathtieornsiismpilraorvsidpeadti,allalybedlisejaocihntpixel raecgcioorndsin. Tglhye. Oaltghoerriwthimse,claanbebleesaucmhmpiaxreizleads aas fsoepllaorwatse. region.
Highlight the importance of spectral–spatial strategies for the accurate classification of hyperspectral images and validate the proposed methods.
Introduction
Advantages of hyperspectral remote sensor technology:
➢The detailed spectral information increases the possibility of more accurately discriminating materials of interest.
But,it also brings some problem: the Curse of ➢DiTmheenfsiinoenaspliatytiaalnrdesthoeluntieoendofforthsepesecinfsicorsspeencatrballe–s sptahteiaal ncalalysssiifsieorfss. mall spatial structures in the image. ➢Many operational imaging systems are currently
PS: ➢Use advanced morphological filters as an 鲁棒alt性ern(Ratoivbeuswt)a:y即o系f p统er的for健mi壮ng性jo，in是t c在las异sif常ica和tio危n.
Introduction
2 PART TThWe HOseg Segmentation.
Abstract
Recent advances in spectral–spatial classification of hyperspectral images are presented in this paper. Several techniques are investigated for combining both spatial and spectral information.
available providing a large amount of images for PSv: arious thematic applications.
维数灾难(Curse of Dimensionality):通常是指在涉
Introduction
The Curse of Dimensionality of hyperspectral remote sensor technology :
➢In high-dimensional spaces, normally distributed data have a tendency to concentrate in the tails, which seems to be contradictory with its bellshaped density function.
➢Iterative statistical classifier based on Markov random field (MRF) modeling. Note that recently adaptive MRF have been introduced in remote sensing.