# README

`fastimagehash`

fast image hashing library for Go.

fastimagehash supports:

Average Hashing
Diffrence Hashing
Perception Hashing
Wavelet Hashing

Installation

go get github.com/octu0/fastimagehash

Benchmark

The basic score was based on goimagehash.

goos: darwin
goarch: amd64
pkg: github.com/octu0/fastimagehash
cpu: Intel(R) Core(TM) i5-8210Y CPU @ 1.60GHz
BenchmarkAverageHash
BenchmarkAverageHash/goimagehash/8x8
BenchmarkAverageHash/goimagehash/8x8-4         	    2707	    424327 ns/op
BenchmarkAverageHash/goimagehash/32x32
BenchmarkAverageHash/goimagehash/32x32-4       	    1836	    570279 ns/op
BenchmarkAverageHash/fastimagehash/32x32
BenchmarkAverageHash/fastimagehash/32x32-4     	   39634	     29911 ns/op
BenchmarkDifferenceHash
BenchmarkDifferenceHash/goimagehash/9x8
BenchmarkDifferenceHash/goimagehash/9x8-4      	    2277	    456987 ns/op
BenchmarkDifferenceHash/goimagehash/33x32
BenchmarkDifferenceHash/goimagehash/33x32-4    	    1874	    592438 ns/op
BenchmarkDifferenceHash/fastimagehash/33x32
BenchmarkDifferenceHash/fastimagehash/33x32-4  	   33601	     34354 ns/op
BenchmarkPerceptionHash
BenchmarkPerceptionHash/goimagehash/64x64
BenchmarkPerceptionHash/goimagehash/64x64-4    	    1311	    813998 ns/op
BenchmarkPerceptionHash/fastimagehash/64x64
BenchmarkPerceptionHash/fastimagehash/64x64-4  	    7542	    146732 ns/op
BenchmarkWaveletHash
BenchmarkWaveletHash/fastimagehash/64x64
BenchmarkWaveletHash/fastimagehash/64x64-4     	    6045	    191712 ns/op