as you can see in the frame from the video, the grids and the image are worse visible (the additional ring is not visible)
how do I change the contrast of a video?
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Pavel Kuzmitsky
on 8 Nov 2022
Edited: Chandler Hall
on 8 Nov 2022
the problem is as follows:
this is the result that matlab outputs:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1185678/image.png)
the same frame, but converted to video:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1185683/image.png)
how can this problem be solved?
Accepted Answer
Chandler Hall
on 8 Nov 2022
Edited: Chandler Hall
on 8 Nov 2022
By default, videos are created using lossy compression which will remove fine details. Consider
img = ...
v = videowriter('filename.avi', 'Archival');
open(v);
writevideo(v, img);
close(v);
to create a video with no compression.
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