The nsxiv project provides a read-only image viewer derived from the Neo Simple X Image Viewer.
Open source
24 alternativesPerspec
Perspec corrects image perspective through a scriptable desktop application.
About Perspec
Perspec is a scriptable desktop app that corrects perspective in photos of planar subjects such as documents, receipts, whiteboards, and facades. Users select files or drag and drop images, review automatically detected corners and adjust them by dragging circles or edges, then save the corrected image.
It offers color, grayscale, and black-and-white save modes and processes multiple images one after another. It is distributed as prebuilt releases with macOS and Linux support, and can be used through a graphical window or command-line commands including a rename sub-command for scanned files.
Key features
- Automatically detects document corners with manual circle and edge adjustment
- Opens multiple photos in sequence for batch correction
- Saves corrected images with -fixed suffix in original directory
- Offers color, grayscale, black-white, and smoothed black-white outputs
- Provides CLI for image correction and file renaming
- Supports display-based interface scaling with manual override variable
Best for: People on macOS or Linux who photograph documents, receipts, whiteboards, or facades and need to correct perspective.
Good for
- Automatic corner detection with option to manually drag circles or edges
- Four save outputs including color, normalized grayscale, and two black-and-white modes
- Graphical and command-line operation with sequential processing of multiple images
Watch out for
- Manually downloaded files require a chmod permission fix before running
- Building from source requires stack and Platypus with command line tools enabled
Perspec at a glance
- Website
- github.com/ad-si/Perspec
- Category
- Software & Utilities › Linux & Mac Apps
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Perspec FAQ
How are corrected images saved?
Click a save button or press Enter. The file is saved in the same directory as the original photo with -fixed appended to the filename.
Can I correct several images at once?
Select multiple photos or pass several paths to the CLI. The images are opened one after another for correction.
How do I install Perspec on macOS?
Download a version from the releases page and fix file permissions, or run brew install --cask ad-si/tap/perspec.
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