Crate blockhash

A perceptual hashing algorithm for detecting similar images.

This is an implementation of the Blockhash algorithm, and can produce 16-, 64-, 144-, and 256-bit perceptual hashes.

Examples

Basic usage:

use blockhash::blockhash64;

let img = image::open("images/example.png").unwrap();
let hash = blockhash64(&img);

assert_eq!(hash.to_string(), "c7c48f8989c77e0c");

Feature flags

• std: Enables features that require the Rust Standard Library (enabled by default).
• image: Enables integration with the image crate (enabled by default).

Structs

• Blockhash16
  A 16-bit hash digest.
• Blockhash64
  A 64-bit hash digest.
• Blockhash144
  A 144-bit hash digest.
• Blockhash256
  A 256-bit hash digest.
• BlockhashParseError
  An error that can be returned when parsing a hexadecimal string into a hash digest.

Traits

• Image
  Image data.

Functions

• blockhash16
  Generates a 16-bit perceptual hash of an image.
• blockhash64
  Generates a 64-bit perceptual hash of an image.
• blockhash144
  Generates a 144-bit perceptual hash of an image.
• blockhash256
  Generates a 256-bit perceptual hash of an image.