Action shot function with multiple images
显示 更早的评论
My function uses multiple RGB images as a 1xn 1D cell array and the output creates an action shot.
For example, this will consist of 6 different images containing one moon, but when combined it creates one image (an action shot).
So far I'm using a nested for loop for the rows, columns and number of images but is there any other way to approach this?
采纳的回答
Yes, here is an approach that uses no loops,
Image4D=double(cat(4,ImageCell{:}));
MedianImage = median(Image4D,4);
[~,idx]= max(vecnorm(Image4D-MedianImage,2,3),[],4);
mask=idx==reshape(1:numel(ImageCell),1,1,1,[]);
result=uint8( sum(Image4D.*mask,4) );
4 个评论
Sara Foster
2019-9-9
编辑：Sara Foster
2019-9-9
Matt J
2019-9-9
Here's one way you could incorporate a loop:
Image4D=double(cat(4,ImageCell{:}));
MedianImage = median(Image4D,4);
[~,idx]= max(vecnorm(Image4D-MedianImage,2,3),[],4);
result=0;
for i=1:numel(ImageCell)
result=result+Image4D(:,:,:,i).*(idx==i);
end
result=uint8( result );
Here's another way with a double for-loop. This one might even be more efficient than the original because it allocates no memory for a mask.
Image4D=double(cat(4,ImageCell{:}));
MedianImage = median(Image4D,4);
[~,idx]= max(vecnorm(Image4D-MedianImage,2,3),[],4);
result=num2cell(zeros(size(MedianImage),'uint8'),[1,2]);
for i=1:numel(ImageCell)%images
loc=(idx==i);
for j=1:3 %color channels
tmp=Image4D(:,:,j,i);
result{j}(loc)=tmp(loc);
end
end
result=cell2mat(result);
Peter Bier
2019-9-11
Interesting approach, although well beyond the scope of what we've taught our students.
This is a reminder to all 131 students that as mentioned in class you need to write your own code for the project that is due shortly (rather than getting code written by one of the kind folks who answer questions on the mathworks forum). Copying any of the supplied code from above and submitting it as your own will be detected by our plagiarism detection software when we come to mark the project.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Image Category Classification 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
