quantize ROI of an image in 3 spaces [0,10),(10,36],(36,255]

So i have a greyscale image named (c.png) and a ROI of that image (roi_c.png) The excersise asks me to quantize the ROI of the image in 3 spaces [0,10),(10,36],(36,255] and do some stuff atfer that . my question is how exaclty do I do that? do i use the imquantize function? there is this quant_A = imquantize(A,levels) but as far as i understand levels is the variable that shows in how many levels it will be quantized and if i use 3 it will not be in the spaces that I want. thanks in advance

Answer 1

[Sufiyan]

Hello,

You can use imquantize function, where you must specify the levels as [10,36] so that it quantizes in to three levels ([0-10], [10-36], [36-255]). You can refer to the code below.

% Load the image 
img = imread('img.jpg');  

% Define the Region of interest(ROI) of image 
roi = img(100:200, 150:450); 

% Define the quantization ranges 
ranges = [10 36]; 

% Quantize the ROI 
quantized_roi = imquantize(roi, ranges); 

% Display the original and quantized ROIs 
figure; 
subplot(1,2,1); 
imshow(roi); 
title('Original ROI'); 
subplot(1,2,2); 
imshow(quantized_roi, []); 
title('Quantized ROI');

you can go through imquantize to get more information about quantization levels.