perceptual-hash

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

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

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

64-bit dHash perceptual image hashing for near-duplicate detection in Bun, Node.js, and Deno.

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

科研图片查重 DSH 插件 · 本地离线检测整图重复/翻转/旋转/缩放、copy-move、跨图区域复用与 PDF 稿件图片。A local-offline integrity checker for life-science figures (DeepSeek Harness plugin).

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.

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

A 64-bit DCT-based perceptual image hash implementation in C# with SIMD-assisted coefficient evaluation and a checksum-style CLI.

Swipe to clean up your iPhone photo library — Tinder-style. Trash, keep, favorite, find duplicates, and free up storage. 100% on-device. SwiftUI + PhotoKit.

Image info, EXIF/GPS, perceptual hashing & thumbnails for DuckDB (Rust)

一键批量清除 PowerPoint 演示文稿中的水印图片（logo、banner、角标等）

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

Let's find out duplicate images with Perceptual Hashing algorithms

Generate content-based image hashes on Node.js.