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what are suitable texture features for these images

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mangood UK
mangood UK on 22 Mar 2014
Edited: mangood UK on 22 Mar 2014
dear i have these images and i want to recognition between them based on texture features [density of yellow color]
can any one suggest for me a single value texture feature ??

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Image Analyst
Image Analyst on 22 Mar 2014
Edited: Image Analyst on 22 Mar 2014
First of all, you need to use crossed polarizers to get rid of the white specular reflections.
Next, I don't see how "density of yellow" is a texture feature. It's more of a color/intensity/radiometric quantity since it's the wavelength/spectrum of light rather than a spatial variation.
What I'd probably do for a start is to compute two classes: reddish, and yellowish/greenish. Look at the color gamut in HSV color space, looking down along the V axis:
You can see how the yellowish/greenish pixels are separated from the reddish/purplish pixels. I'd calculate the total number of pixels for each color class as well as the area fraction for each color class. I'd also give the mean LAB color of each, and if you have a "true/nominal/reference" color then I'd give the delta E (the "color difference" between the actual object and it's reference color. See my delta E demo in my File Exchange. Also, see my "Color detection by hue" full demo in my File Exchange: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

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mangood UK
mangood UK on 22 Mar 2014
ok dear Image Analyst [we not has your real name], its more clear now
i will start testing and i will report for any issue
best regards
Image Analyst
Image Analyst on 22 Mar 2014
OK. I prefer to remain anonymous, though some people know who I am (like people at the Mathworks and some others). If it works after you test it, then please mark my Answer as "Accepted."
mangood UK
mangood UK on 22 Mar 2014
as you like Image Analyst
have a nice day
regards

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