how to set pixel become white pixel

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mohd
mohd 2012-5-18
i have an image, i want to set row 0 until row 20 become all white pixel in that image. here i attach my illustration pic for your understanding. help me please http://i1259.photobucket.com/albums/ii548/msaiful89/hmm.png

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回答（1 个）

Walter Roberson
Walter Roberson 2012-5-18
YourImage(1:21,:,:) = 255;
Replace the 255 with 1 if your image is floating point.

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