setting the colors for blocks

i've a grayscale image and i've divided into non-overlapping blocks.

i want to color/mark the blocks having same mean value.

can anyone tell me how to do so.. as i m novice to matlab...

if required tell me as soon as possible i can provide you my code.

Answer 1

[Walter Roberson]

Take the matrix of mean values, and imagesc() it.

[angel]

sir i've sorted the mean values in the array and when m applying the imagesc() it shows the same image as x n y axis...

like i've an image having block size 8x8...all the blocks have different or same mean value right. now i want to color/mark only those blocks which have same mean values in order to recognize it..

can u help me sir..

i have used the subplot function

subplot(8,8,oneBlock);

where oneBlock is an 8x8 block...

also oneblock=(row1:row2,col1:col2);

[Walter Roberson]

subplot() is to create axes, not to plot anything.

If your unsorted array of mean values is (say) "meanvalues" then

imagesc(meanvalues)

[angel]

imagesc(meanValues) shows blocks in bar form..i do not want this..

i want those block having same mean values to color the pixel some color for example block 2 and block 5 have mean value 50.6 i want color the pixel of both the block with RED

also if block 5 and block 16 have mean value 34.5 then color the pixel of these block with let say GREEN

can u tell me how to do?

[Walter Roberson]

imagesc(meanValues) does not show the blocks in bar form -- not unless you have meanValues as a vector instead of an array.

Follow this example:

fun = @(block_struct) ...
  std2(block_struct.data) * ones(size(block_struct.data));
I2 = blockproc('moon.tif',[32 32],fun);
imagesc(I2);
colormap(flag);

[angel]

meanValue is array in my code...

u mean i've to convert it into vector form first right?

then apply imagesc(meanValue);

is it this u r saying??

[Walter Roberson]

No, it needs to be an array.

I suggest you upload an image of the result of imagesc(meanValues)

http://www.mathworks.com/matlabcentral/answers/7924-where-can-i-upload-images-and-files-for-use-on-matlab-answers