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I have a RGB image which has a format 720*576*3,I want to change it to 256 gray image here is my programme ,but it not the same as I save by Windows . where is the question ? Download File:post-4693-1145189270.vi

I have a RGB image which has a format 720*576*3,I want to change it to 256 gray image here is my programme ,but it not the same as I save by Windows . where is the question ?

i have do some work like this ,please give me some advise Download File:post-4693-1144478868.vi

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 i have a 5*4array like that .what could i do to change it to the following: 1 1 2 2 3 3 4 4 5 5 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 16 16 17 17 18 18 19 19 20 20