How to change 1 channel image to 3 channel
56 次查看(过去 30 天)
显示 更早的评论
I have several grayscale images with channel 1, then I want to convert it to RGB channel 3 image, how do I change it?
0 个评论
采纳的回答
Image Analyst
2019-12-13
Try cat() to stack the gray scale image into 3 slices (color channels):
rgbImage = cat(3, grayImage, grayImage, grayImage);
It will be an RGB image though the only colors will be gray since there is no difference between the three different color channels. It will be a 3-D image with the z-direction (third index) being the color channel index.
2 个评论
更多回答(1 个)
DGM
2022-5-2
Alternative to using cat(), the same can also be done a couple other ways.
You can use repmat()
rgbpict = repmat(graypict,[1 1 3]);
... or you can even use basic indexing:
rgbpict = graypict(:,:,[1 1 1]);
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Image Processing Toolbox 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!