图片相似度计算（直方图、峰值信噪比、结构相似性、感知哈希算法）、轮廓检测、直线检测、圆检测、角点检测、直线交点计算、旋转角度矫正、图像匹配的对应相似处连线、灰度、二值化、直方图均衡化。

Calculate PhotoDNA hashes using Python

CLI Java wrapper for the PhotoDNA library

Perceptual hashing command-line tool

Perceptual Hash in J

audio perceptual hash extraction library

A library of perceptual hash algorithms (aHash, dHash, pHash, wHash).

Universal social-media & video scraper — X/Twitter, YouTube, Vimeo + generic video discovery + impersonation detection via perceptual hashing. Stdlib-only core. No API keys required.

Local image intelligence engine — semantic search, duplicate detection, metadata, safe trash, all on your machine.

Here will be C++ library for perceptual image hashes.

Self-hosted deep-search for your own YouTube playlists & likes: find any video by title, stats, date, thumbnail/avatar (perceptual-hash image search) or your own comments. Read-only OAuth, runs locally. Built with Nuxt 4, Vue, Nitro, Drizzle + Postgres (pgvector), Valkey & Docker.

Python tools for cleaning up large photo libraries - remove duplicates, screenshots, and similar images with a browser-based review UI

Android librarry (kotlin) : Image (JPEG, BMP) comparison (perceptual hash algorithm)

Find matching Iconify icons by visual similarity

Generate content-based image hashes on Node.js.

Let's find out duplicate images with Perceptual Hashing algorithms

AI-powered photo & video organizer for macOS. Deduplicate, tidy up, and restructure your library with perceptual hashing, EXIF analysis, and natural-language conversation. Zero-risk, read-only scan with human-approved actions.

从PPT录屏视频中提取不相似帧，从而逆向构建PPT各页

Stop duplicate product listings: SHA-256 + perceptual hash + CLIP cascade with measured thresholds, plus text-to-image and image-to-image catalog search. Web UI and CLI, CPU or GPU, no training.

Drive Dupe Destroyer (DDD) is a browser-based Google Drive duplicate image finder. It helps you scan selected Google Drive folders, identify exact and visually similar images, compare suspected duplicates side by side, export results, and move unwanted files to Google Drive Trash.