How to form an image from these processed block so that i can use impixel() function to find the required values on my image??

clc;
clear all;
I=imread('D:\Images\Project images\test1.png');
 figure,imshow(I)
a=rgb2gray(I);
Converting color to grayscale
a1=imresize(a,[256,256]);
 subplot(1,2,1);
 imshow(a1);
title('Sample Eye image 1')
a1=double(a1);
a3=uint8(a1);
a1norm=a1/max(max(a1));
 figure,imshow(a1norm);
[r c]=size(a1);
 Block Size (8x8)
 bs1=4;
bs=2;
 bs2=2;
nob=(r-1)*(c-1);
 nob1=r/bs1*c/bs1;
 nob2=r/bs2*c/bs2;

   % Dividing the image into 8x8 Blocks

kk=0;
for i=1:(r-1)
for j=1:(c-1)
 block4 (:,:,kk+j)= a1norm(((i-1)+1:(i-1)+bs),((j-1)+1:(j-1)+bs));
 block5(:,:,kk+j) = mean2(a1norm(((i-1)+1:(i-1)+bs),((j-1)+1:(j-1)+bs)));
 block6(:,:,kk+j) = entropy(a1norm(((i-1)+1:(i-1)+bs),((j-1)+1:(j-1)+bs)));
end

kk=kk+(r-1);
end

   m1=max(max(block5));
   block5=block5/m1;

   m2=max(max(block6));
  block6=block6/m2;

Here i have processed the image by creating overlapping blocks. So my requirement here is to convert block 6 and block 5 back to images .

Answer 1

[Image Analyst]

Just don't create blocks in the first place. What's the point? Just assign the single pixel value directly as you determine it.

image(j, i) = a1norm..... etc.