Perceptual Hash

Turkish equivalent: Algısal karmaDomain: Computer Vision

A compact fingerprint designed so visually similar media produce similar hash values even when their binary encodings differ.

Geometric and Perceptual Boundary

A perceptual hash measures content similarity and is not a cryptographic integrity hash; collisions and near-duplicate thresholds are expected parts of its use.

Hamming Distance
Discrete Cosine Transform
Cryptographic Hash
Near-Duplicate Detection

Updated: 01.09.2026

Related technical publications

Publications whose title or summary directly references this concept.

Perceptual Image Similarity with DCT and SIMD

A DCT-based perceptual hash remains close under small visual transformations and enables inexpensive candidate filtering with a 64-bit signature and Hamming distance.

Geometric and Perceptual Boundary

Related Computer-Vision Concepts

Perceptual Image Similarity with DCT and SIMD