How do I verify whether what I am removing from a noisy image is only the noise
1 次查看(过去 30 天)
显示 更早的评论
Hi All
I have to remove noise from an image, that I don't have a sample without noise to compare to. How could I know if I am not removing more than noise, like some data from the real image itself ?
0 个评论
采纳的回答
Image Analyst
2018-10-9
One way is to look at the difference of the denoised image and the original image.
diffImage = double(originalImage) - double(denoisedImage);
imshow(diffImage, []);
colorbar;
If you see any sort of structure in the image, then you're removing more than just noise. If it looks like completely random white noise with no spatial structures evident, then it's probably only noise that you've removed.
0 个评论
更多回答(1 个)
Walter Roberson
2018-10-9
Create several images and corresponding noisy images with similar noise characteristics to those you are likely faced with, and adjust your code until you are satisfied that it only removes noise. Then apply it to your input image.
... Expect this process to take a number of centuries to come up with the right algorithm.
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Image Segmentation and Analysis 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!