I have a 100-something paged .pdf file, and I want to apply the same operation to each page:
1- select blacks with a certain fuzziness
2- erase background
3- copy the layer with blacks, blur, merge and then apply unsharp mask
4- fill bg with white
At the end of this I want to save the pages in a single .pdf file with the same order. Is this doable without converting the .pdf file into 100 image files and batch processing them?