How can I randomly sample 10% and 20% pixels of an image
1 次查看(过去 30 天)
显示 更早的评论
Hello guys
I have an image of size 2,048×2,048 pixels,
I would like to stack the 3 channels to get a matrix of size 6,144 × 2,048.
Then, sample 10% and 20% pixels to construct respectively with sizes each 2048 x 2048 sparse double
pic = double(imread('new4.jpg'));
redChannel = pic(:,:,1);
blueChannel = pic(:,:,2)
greenChannel = pic(:,:,3)
% now my problem is stacking and sampling. Please help!
1 个评论
Adam Danz
2020-7-11
You can use randsample https://www.mathworks.com/help/stats/randsample.html
or, if you need to extract the red blue green as you've done in the code from your question, you can just use vertical concatenation,
x = [A;B;C];
回答(0 个)
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!