我感兴趣的某种炭过滤器，如Photoshop的影印过滤或注意 - 纸。 有人一纸或一些指示如何此过滤器？

i'm interested in some kind of charcoal-filters like the photoshop Photocopy-Filter or the note-paper. Have someone a paper or some instructions how this filter works?

在最好的情况下，我想创建如下：

In best case i want to create the following:

输入：

输出：

问候

推荐答案

我的认为的它是一个过程类似于泛锐化。我能得到一个非常类似的图像在GIMP是：

I think it's a process akin to pan-sharpening. I could get a quite similar image in gimp by: