i divided the image into nonoverlapping blocks. now i've to calculate the mean of evry block. how to calculate it? pease correct the code

    clc
    close all
    clear all
    a=imread('cameraman.tif');
    for i=1:8:size(a,1)
        for j=1:8:size(a,2)
            b=a((i:i+7),(j:j+7));
            Mean=[];

for row = 1 : blockSizeR : rows for col = 1 : blockSizeC : columns

                row1 = row;
    row2 = row1 + blockSizeR - 1;
    row2 = min(rows, row2);
                col1 = col;
    col2 = col1 + blockSizeC - 1;
    col2 = min(columns, col2);
                oneBlock = grayImage(row1:row2, col1:col2);
                m=mean(mean(oneBlock));
                M=b;
                Mean=[Mean;M];
                disp(Mean);
           end
     end

    end
    end

Answer 1

[Matt J]

It will be more efficient to use sepblockfun ( Download ).

   Mean=sepblockfun(grayImage,[8,8],@mean);