how to make an occlude image

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siti nur 2011-3-25

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https://ww2.mathworks.cn/matlabcentral/answers/3964-how-to-make-an-occlude-image

i am doing occluded face recognition for my final project. first, i input regular image which is not occluded. then i have to do experiments for occluded image. i used paint to make a square on the face image to make my image occluded. but when i try to test it with my code, it turn error. I found that the image that i edit with paint to make the picture occlude is 112x92x3. The input image should have the same size with the image that i already trained before which is 112x92, but it become 3 dimension. How do i want to make it 2 dimension only and make my image occluded. Please help me....thank you