What is the inverse of a filter?

15 次查看（过去 30 天）
Meshooo
Meshooo 2015-12-11
评论： Meshooo 2016-1-6
Dear all,
I have a gray intensity image, I, and let's say I applied a mean filter to it of size 3
Meanfilt = filter2(fspecial('average',3),I)/255;
My question is how to return the image back from Meanfilt ----> I ? Is there any inverse functions in matlab?
Thank you.
Meshoo

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2015-12-11
http://www.mathworks.com/matlabcentral/answers/42575-how-can-i-deblur-an-image-given-the-original-psf
For the averaging filter there is also a way to do it by solving systems of linear equations; I think the logic should extend to anything constructed using conv2() but I would need to think more to check. It involves creating an (R*C) x (R*C) matrix of weights, which could get rather large. I do not know how efficient it would be.

更多回答（1 个）

Image Analyst
Image Analyst 2015-12-22
Well there is such a thing as an inverse filter, though it has problems in real world implementations because the noise can wreak havoc. So they've invented better methods that are more robust and better in the presence of noise. Look up the help on wiener2() and deconvlucy().

类别

在 Help Center 和 File Exchange 中查找有关 Image Processing Toolbox 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by