Birbla

Join the discussion

Write your take first — we'll ask for email only when you're ready to publish.

Sign in
  • Hacker News
  • 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!
    by giancarlostoro
  • I find funny the « I don't like python so let me use something worse that will force me to do 10x the work »
    by poulpy123
  • It is nagware:

    > Before an image is saved, a "Buy License" banner is shown for 10 seconds.

    by OutOfHere
  • 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

    by dmwood
  • Last time I used Gimp it had a plugin that let you correct perspective, wonder how they both compare
    by Gualdrapo
  • 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...
    by esafak
  • 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.

    by speerer
  • I am so glad I read the OP. To me, the big news here is "FlatCV", the author's computer vision library.

    Why it interests me:

    1. A practical and elegant approach to scanning real-world documents like receipts, invoices, and letters. These usually have folds, curvature, and wrinkles, and general-purpose scanning tools do a poor job.

    2. It's written in C.

    3. It takes output quality seriously, finding color thresholds suitable for printed matter carefully and building PNG images instead of throwing you into a generic jpg pipeline.

    Thank you for writing this software and also the introduction! Will definitely read further.

    by ripe

Explore Birbla archives