Legacy ImageMagick Discussions Archive

snibgo wrote: 2017-02-26T19:30:35-07:00 The command calculates:

Code: Select all

D = (R - S.Sa) / (1-Sa)

Thanks!*-*
I think now I will be able to make it in PHP

In console it works great, I just should add some transparent white layer to original to avoid artefacts like in attachment.

I suggest you put it inside an "exec()". The command you showed uses Windows BAT syntax (eg line-ends are "^") and may need adjusting for PHP.


Of course I don't want to make PHP do all of this for one command. Instead of '^' I can use number of commands. Instead of images in memory I hope to ...

Hello!
My goal is to subtract one transparent image from another (like delete watermark when I have this watermark as a picture)
I found ImageMagick script, but I don't know how to translate it to IMagick PHP code.
Can you help me with understanding this script or with translating it?

convert ...