How can I color all objects as the same in an image where several objects have been extracted in the form of a label matrix?

https://www.mathworks.com/help/images/correcting-nonuniform-illumination.html

I don't want the objects to be of different colors - I want them all the same shade of red (or white or blue). How can I achieve this?

[Matt J]

It is advisable in the forum to post code as text, rather than as an embedded image. That way, contributors can more easily copy/paste it.

Answer 1

[Image Analyst]

You don't need bwlabel(), label2rgb(), or colormaps. You can simply use imoverlay:

grayImage = imread('rice.png'); % A gray scale image.
mask = bwareaopen(imbinarize(grayImage, 'adaptive'), 8); % A binary/logical image.
% Overlay the mask onto the original image.
rgbImage = imoverlay(grayImage, mask, 'r'); % Creates a new RGB image.
imshow(rgbImage)

Answer 2

[Matt J]

Bianrize the labels,

RGB_label-label2rgb(labeled>0,___);

imshow(RGB_labels);

[yanqi liu]

yes，sir，it is great mehod，may use code to check it

clc; clear all; close all;
im = imread('rice.png');
bw = bwareaopen(imbinarize(im, 'adaptive'), 8);
[labeled,num] = bwlabel(bw);
% make to one label
RGB_labels=label2rgb(labeled>0);
figure; imshow(RGB_labels);

% self define colorm map
cmap = ones(num, 3); cmap(:, 1:2) = 0; cmap(1,1) = 0;
RGB_labels2=label2rgb(labeled,cmap);
figure; imshow(RGB_labels2);