Exciting! I needed this last week, and now here it is. Thanks.
I share the annoyance about phone detection previees over-promising. But I'm pleased this comes with perspective correction and lighting correction together.
Crashes on launch
macOS: macos-26_arm version installs (with intervention to permit running), but crashes on launch. ------------------------------------- Translated Report (Full Report Below) ------------------------------------- Process: perspec [94673] Path: /Users/USER//Perspec.app/Contents/Resources/perspec Identifier: perspec Version: ??? Code Type: ARM-64 (Native) Role: Unspecified Parent Process: Exited process [94672] Coalition: com.adriansieber.Perspec [86355] Responsible Process: Perspec [94671] User ID: 501
Date/Time: 2026-08-04 12:50:37.5848 -0600 Launch Time: 2026-08-04 12:50:37.5821 -0600 Hardware Model: Mac13,1 OS Version: macOS 26.6 (25G72) Release Type: User
Crash Reporter Key: 9FD40ACB-279F-0F79-41E1-8B4D3B663EA7 Incident Identifier: 207F9047-B786-4C8C-8263-BA9C4DB370EB
Time Awake Since Boot: 320000 seconds
System Integrity Protection: enabled
Triggered by Thread: 0
Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000
Termination Reason: Namespace DYLD, Code 1, Library missing Library not loaded: /opt/homebrew//libwebp.7.dylib Referenced from: <47F30FA1-4AB9-310F-8988-5CABFEF76F5E> /Users/USER//Perspec.app/Contents/Resources/perspec Reason: tried: '/opt/homebrew//libwebp.7.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew//libwebp.7.dylib' (no such file), '/opt/homebrew//libwebp.7.dylib' (no such file) (terminated at launch; ignore backtrace)
Dyld Error Message: 1
Thanks for the report. I'm looking into it!
Be fully aware it is AGPL licensed before you try to use any of this code for something "at work" without realizing it. That said, looks neat!
Last time I used Gimp it had a plugin that let you correct perspective, wonder how they both compare
haskell :)
The Google Camera app already does this (much). I look into this problem during a receipt scanning project. If you want development ideas look up "metric rectification" and 'manifold dewarping'; e.g. https://openaccess.thecvf.com/content/WACV2025/papers/Hertle...
Samsung Galaxy camera as well. Just hit "scan" when it pops up and you get the same results.
The "Initial Motivation" section in the article explains why existing mobile apps aren't good enough.
It is nagware:
> Before an image is saved, a "Buy License" banner is shown for 10 seconds.
That seems pretty reasonable! It's also AGPL licensed and the source code is available on GitHub. 20 minutes with an LLM would likely yield you a nagware-free version if you value your time at less than $21/hour. Otherwise it costs just $7 to pay Adrian for their good work!
Why, when I could use an AI to both detect the corners and write+run a completely free ad-hoc script to fix the perspective.