can plz explain the source code in matlab

Question

Sheema Khattak 2014-4-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/127139-can-plz-explain-the-source-code-in-matlab

评论： Walter Roberson 2014-4-29

how or on what basis selected the numerical values for matrix e.g. labels=[],features[] etc are created for image dataset to be used for multiclass svm in matlab

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2014-4-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/127139-can-plz-explain-the-source-code-in-matlab#answer_134558

References are given in the documentation: http://www.mathworks.com/help/stats/svmclassify.html. You can read the papers to see how it's done in detail.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Walter Roberson 2014-4-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/127139-can-plz-explain-the-source-code-in-matlab#answer_134573

编辑：Walter Roberson 2014-4-25

Mark all of the images with no skin at all (showing only background) as being group 1; mark all of the images that show skin but have no skin disease as being group 2; mark all of the images that show skin disease as being group 3. These are the values that you would put into your labels vector.

I am not familiar with texture analysis to be able to guide you about what feature vectors you should create.

http://www.mathworks.com/help/images/texture-analysis-1.html

3 个评论
显示 1更早的评论隐藏 1更早的评论

Sheema Khattak 2014-4-26

How would I specify that group 1=background,group 2 = no skin disease and group3=skin disease?

Walter Roberson 2014-4-29

You just create a vector of numbers. e.g., if your first row of features corresponded to a picture with no skin disease, then the first entry in the vector would be 2.

请先登录，再进行评论。