I need the code for extracting the digital numbers from the color planes!
2 views (last 30 days)
Show older comments
Ali Ibrahim
on 25 Jan 2017
Commented: Ali Ibrahim
on 26 Jan 2017
I need a code to extract the digital numbers from the three color planes--red, green, blue
3 Comments
Accepted Answer
Image Analyst
on 25 Jan 2017
Look at impixelinfo() for telling you what the RGB values are as you mouse around.
Here are some snippets that might help you:
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Recombine separate color channels into a single, true color RGB image.
rgbImage = cat(3, redChannel, greenChannel, blueChannel);
% Mask image must be converted to the same integer type
% as the integer image we want to mask.
mask = cast(binaryImage, 'like', rgbImage);
% Multiply the mask by each color channel individually.
maskedRed = redChannel .* mask;
maskedGreen = greenChannel .* mask;
maskedBlue = blueChannel .* mask;
% Recombine separate masked color channels into a single, true color RGB image.
maskedRgbImage = cat(3, maskedRed, maskedGreen, maskedBlue);
Also see my File Exchange for some color image demos:
7 Comments
See Also
Categories
Find more on Spectral Measurements in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!