Sliding window search and Entropy value for each window

Hello, I want some help here

I need to apply Sliding window search in image, and calculate the Entropy value for each window (I looking for highest Entropy value in the image),

Here is the pseudo code:

(1) Sliding window search

Emax=0

For each window Wi

Compute the Entropy Ei

If Ei > Emax

Then update Emax

End

End

Can someone help me with that please?

Answer 1

[Subhadeep Koley]

Hi, refer the code below. It calculates entropy values for different (16x16) window of an image and displays them as a heatmap.

clc; close all;
% Read the image
img = im2double(imread('cameraman.tif'));
% Define the function handle
fun = @(block_struct) entropy(block_struct.data);
% Distinct block processing for the image
blockEntropy = blockproc(img, [16 16], fun); 
% Display heatmap for visualization
figure; heatmap(blockEntropy); colormap hot;