Camscanner-like app for Mac OSX I have some photos of notes that have been sent to me, and I would like to "fix" them in order to have a scanned-like pdf like the one that I get when scanning with Camscanner app (on Android or iOS).
I've done some research but I've found only a discontinued app, doxcan.
 Is there a maintained app to do so?
 EDIT: from the comments, here's a more detailed explanation of what I need: 
I need something that allows me to "flatten" the photo and make it in white and black. Just like when in Camscanner you fix the corners of the document and it warps the image in order to make it as it was acquired from scanner. Then it performs a conversion from color to b/w (probably applying some filters too, but nevermind of that) doxcan does it but I cannot find anywhere to download, since it's discontinued... 
here is all I found about doxcan
I use PDF Pen Pro to fix up scans and OCR them (optionally) and see as PDF. Depending on what "fix" them up is, the preview app might be fully capable for your needs.

PDF Expert also gets great reviews, but I've not needed anything as Preview and PDF Pen Pro have my needs covered.


https://smilesoftware.com/PDFpen
https://smilesoftware.com/PDFpenPro