Iterate through Image histogram data for getting each pixel frequency individually

Hi. I am new to matlab. I have created an image histogram using imhist function. Now I want to further process this imhist data.

1. I want to get the frequency(counts) of each pixel.

2. I want to store that frequency value against its pixel location into a new image.

I tried this code:

clc
clear all
close all
x=(im2double(imread('1.jpg')));
I = rgb2gray(x);
[counts,binLocations] = imhist(I)
stem(binLocations,counts);
binN = size(binLocations)
    [m,n,r]=size(x);
     newimg_l = zeros(m,n);
     for ii=1:size(I,1)
    for jj=1:size(I,2)
        % get pixel value
        pixel=I(ii,jj)
        disp(pixel)
          % check pixel value and assign new value
           for n=1:binN;
               temp = binLocations(n)
               if(pixel == temp)
               new_pixel = counts(n)
               end
            end  
          % save new pixel value in thresholded image
          newimg_l(ii,jj)=new_pixel;
      end
  end

Please help. Thanks in advance!

Answer 1

[KALYAN ACHARJYA]

1. I want to get the frequency(counts) of each pixel.

No need of too many loops

count_pixel=length(image_gray(image_gray==pixel_value));

Now apply the single for loop for pixel_value=0:255 and do proper indexing, avoid count_pixel(0)

2. I want to store that frequency value against its pixel location into a new image.

Question 1 gives you, counts the pixel frequency wrt respective pixel value as counts(pixel value)

counts(1)=some value

counts(2)= some value

..........

Sorry I cant undestant the second question, but it seems easy.