How to convert multiple rgb snapshots into grayscale and save them into a folder?

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Omar Ahmad
Omar Ahmad 2014-11-23
评论： Image Analyst 2014-11-29
I've taken multiple rgb snapshots and saved them into the folder using for-loop. But now I need to know how those snapshots can be converted into grayscale and save them into a folder.
After the above has been done, I need to know how both of these (rgb and gray) can be subtracted so that the difference is spotted.
Please help. thank you very much in advance.

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Image Analyst
Image Analyst 2014-11-23
Try this:
grayImage = rgb2gray(rgbImage);
diffGray = double(grayImage) - double(grayReferenceImage);
diffRGB = double(rgbImage) - double(rgbReferenceImage);
if max(abs(diffGray(:))) > 0
% There is at least one different pixel.
end
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Omar Ahmad
Omar Ahmad 2014-11-29
编辑：Omar Ahmad 2014-11-29
So to make the question short and simple. I want the result of diffGray converted into Binary and save it.By this I must be able to view in Black and White. Please help. This could be my last question. You (image analyst and Mohammed Abouali) helped me alot.
Image Analyst
Image Analyst 2014-11-29
OK, you want to binarize the difference signal by thresholding it and turning it into a logical array. So you can do something like
binaryImage = diffRGB > someValue; % Like 2 or 5 or whatever
Pick a value that you want to see if the difference is greater than. Like if the difference between the images is more than 3 gray levels, show it, otherwise consider them the same with essentially no difference at all.

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