how to change the pixel value of an image

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nandish s
nandish s am 24 Feb. 2012
i have an image and i need to change the pixel value of that image in any co-ordinate.

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Jeff E
Jeff E am 24 Feb. 2012
Assuming a grayscale image:
>> img = uint8([10 30 50 ; 3 4 10])
img =
10 30 50
3 4 10
>> img(2,2) = 0
img =
10 30 50
3 0 10
>>

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