satellite image color problem
3 views (last 30 days)
Show older comments
dakhli mohamed
on 11 Jan 2019
Commented: dakhli mohamed
on 14 Jan 2019
Hello
I have a black and white image and I want the white area to be displayed in red. I have a code but badly the zone in black is displayed in red. I just want to change the code to have my result,
and thanks in advance and thanks for Image Analyst
I have attached the image.
rgbImage = imread('C1fig.jpg');
whos rgbImage
subplot(2, 1, 1);
imshow(rgbImage);
title('Original RGB image C1fig.jpg');
axis('on', 'image');
impixelinfo
mask = rgbImage(:, :, 1) == 0;
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
redChannel(mask) = 255;
greenChannel(mask) = 0;
blueChannel(mask) = 0;
% Recombine separate color channels into a single, true color RGB image.
rgbImage = cat(3, redChannel, greenChannel, blueChannel);
subplot(2, 1, 2);
imshow(rgbImage);
axis('on', 'image');
impixelinfo
title('Altered RGB image');
0 Comments
Accepted Answer
Image Analyst
on 12 Jan 2019
This is a duplicate question. I already answered it here: in your duplicate post
Like I already said, essentially you just define the mask to find white pixels instead of black pixels:
mask = rgbImage(:, :, 1) > 250; % or whatever value you want.
Why did that not work for you, such that you had to post a duplicate question on it???
More Answers (0)
See Also
Categories
Find more on Image Processing Toolbox in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!