how to create 8*8 subblock from a image without using matlab command

2012 11 22
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how to create 8*8 subblock from a image without using matlab command

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Walter Roberson
Walter Roberson 2012-11-22
Use MATLAB functions instead ?
Are you aware that even array indexing uses built-in MATLAB functions?
vipul utsav
vipul utsav 2012-11-22
it is ok. but i don't want to use mat2cell type function.i want logic for dividing image into subimage of 8*8.

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Walter Roberson
Walter Roberson 2012-11-22

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Hint:
rowblks = size(YourImage, 1) / 8;
for K = 1 : rowblocks
YourImage( 8 * K - 7 : 8 * K, ....... )

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vipul utsav
vipul utsav 2012-11-22
if i have 400*400 image and i want to read 6th number 8*8 block. how can i do it.
Walter Roberson
Walter Roberson 2012-11-22
What is "6th number 8*8 block" ? When you are dividing into 8x8 blocks, you will have those blocks going across and those blocks going down, so which one of them is the "6th" ?
vipul utsav
vipul utsav 2012-11-22
400*400=50*50 sub block of 8*8 ;i want every block to read for some doing some mathematical operation on it. suppose i want 6th block of 1st row.
Walter Roberson
Walter Roberson 2012-11-22
BR = 1; BC = 6;
YourImage(8 * RB - 7 : 8 * BR, 8 * BC - 7 : 8 * BC, :)

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vipul utsav
vipul utsav
2012-11-22

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