selecting color from block

I have divided an image into blocks ,now i want to extract color from each block ,can u tell which method to apply,can i find average of pixels for this,and i want to show blocks of image,i.e 64 blocks in image,(like grid)

[Walter Roberson]

What does it mean to you to "extract color from each block" ?

[Pat]

walter please see page number 23 and Fig 3.3

http://www.sendspace.com/file/x7jqv7

[Walter Roberson]

You mean the part that says,

"After the image partitioning stage, a single representative color is selected from

each block. Any method to select the representative color can be applied, but

the standard recommends the use of the average of the pixel colors in a block

as the corresponding representative color, since it is simpler and the description

accuracy is sufficient in general."

If so, then like it says, ANY method to select the representative color can be applied. Pick a pixel at random if you like.

[Pat]

s walter that i meant and i need output as tiny icon as indicated ,is it possible

plz tell how to divied image into 64 blocks in single command ,say in single line plz

[Pat]

imageSize = size(img);

blockLen = round(imageSize(1:2)/8);

out = blocproc(img,blockLen,@myFunction)

can u tell what i should write in (i just need output in 64 blocks)

@myFunction

[Walter Roberson]

Is that a call to blkproc() or to blockproc() ? The arguments are different between the two.

[Walter Roberson]

function P = myFunction(X)

R = randperm(numel(X));

P = X(R(1));

end

[Pat]

what is X why u r using function command there

[Pat]

walter plz tell how to get those images as indicated in that paper plz and i want to calculate mean of each block also please guide