Inserting Color Map value in an image
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I have a number of compressed image files in a folder named "Video". I wanted to reconstruct them into an avi video but it said that color map value cannot be non empty. Whats the problem and what is the remedy?
回答（4 个）
Marta Salas
2014-4-4
编辑：Marta Salas
2014-4-4
You can copy the code you are using to be able to help you. You can also try this function:
function make_video(video_dir,extension,aviname,fps)
resnames=dir(fullfile(video_dir,['*.' extension]));
aviobj=VideoWriter(aviname);
aviobj.FrameRate=fps;
open(aviobj);
for i=1:length(resnames)
img=imread(fullfile(video_dirs,resnames(i).name));
F=im2frame(img);
if sum(F.cdata(:))==0
error('black');
end
writeVideo(aviobj,F);
end
close(aviobj);
end
Example: make_video('/home/user/myImages/','jpg','myvideo.avi',5)
2 个评论
Rishav
2014-4-4
Marta Salas
2014-4-4
Copy and paste on a .m file
video_dir ='/home/user/myImages/';
extension = 'jpg';
aviname = 'myvideo.avi';
fps =5;
resnames=dir(fullfile(video_dir,['*.' extension]));
aviobj=VideoWriter(aviname);
aviobj.FrameRate=fps;
open(aviobj);
for i=1:length(resnames)
img=imread(fullfile(video_dirs,resnames(i).name));
F=im2frame(img);
if sum(F.cdata(:))==0
error('black');
end
writeVideo(aviobj,F);
end
close(aviobj);
Rishav
2014-4-4
0 个投票
1 个评论
Image Analyst
2014-6-10
Rishav, why is it taking you so long to resolve this? What's the problem now?
Rishav
2014-4-5
0 个投票
1 个评论
Image Analyst
2014-4-5
That's because it's not right. See my answer for how to do it. You will notice differences where the colormap is concerned.
Image Analyst
2014-4-5
0 个投票
See my attached example. It first reads a video and writes out all the frames to disk. In the second part it reconstructs the video by reading in all those images from disk and building a movie from them. It's very well commented so even new people like yourself are able to follow it.
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2014-6-10
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