97 lines
4.1 KiB
Markdown
97 lines
4.1 KiB
Markdown
|
|
[](https://godoc.org/github.com/corona10/goimagehash)
|
|
[](https://goreportcard.com/report/github.com/corona10/goimagehash)
|
|
|
|
# goimagehash
|
|
> Inspired by [imagehash](https://github.com/JohannesBuchner/imagehash)
|
|
|
|
A image hashing library written in Go. ImageHash supports:
|
|
* [Average hashing](http://www.hackerfactor.com/blog/index.php?/archives/432-Looks-Like-It.html)
|
|
* [Difference hashing](http://www.hackerfactor.com/blog/index.php?/archives/529-Kind-of-Like-That.html)
|
|
* [Perception hashing](http://www.hackerfactor.com/blog/index.php?/archives/432-Looks-Like-It.html)
|
|
* [Wavelet hashing](https://fullstackml.com/wavelet-image-hash-in-python-3504fdd282b5) [TODO]
|
|
|
|
## Installation
|
|
```
|
|
go get github.com/corona10/goimagehash
|
|
```
|
|
## Special thanks to
|
|
* [Haeun Kim](https://github.com/haeungun/)
|
|
|
|
## Usage
|
|
|
|
``` Go
|
|
func main() {
|
|
file1, _ := os.Open("sample1.jpg")
|
|
file2, _ := os.Open("sample2.jpg")
|
|
defer file1.Close()
|
|
defer file2.Close()
|
|
|
|
img1, _ := jpeg.Decode(file1)
|
|
img2, _ := jpeg.Decode(file2)
|
|
hash1, _ := goimagehash.AverageHash(img1)
|
|
hash2, _ := goimagehash.AverageHash(img2)
|
|
distance, _ := hash1.Distance(hash2)
|
|
fmt.Printf("Distance between images: %v\n", distance)
|
|
|
|
hash1, _ = goimagehash.DifferenceHash(img1)
|
|
hash2, _ = goimagehash.DifferenceHash(img2)
|
|
distance, _ = hash1.Distance(hash2)
|
|
fmt.Printf("Distance between images: %v\n", distance)
|
|
width, height := 8, 8
|
|
hash3, _ := goimagehash.ExtAverageHash(img1, width, height)
|
|
hash4, _ := goimagehash.ExtAverageHash(img2, width, height)
|
|
distance, _ = hash3.Distance(hash4)
|
|
fmt.Printf("Distance between images: %v\n", distance)
|
|
fmt.Printf("hash3 bit size: %v\n", hash3.Bits())
|
|
fmt.Printf("hash4 bit size: %v\n", hash4.Bits())
|
|
|
|
var b bytes.Buffer
|
|
foo := bufio.NewWriter(&b)
|
|
_ = hash4.Dump(foo)
|
|
foo.Flush()
|
|
bar := bufio.NewReader(&b)
|
|
hash5, _ := goimagehash.LoadExtImageHash(bar)
|
|
}
|
|
```
|
|
|
|
## Release Note
|
|
### v1.1.0
|
|
- The performance of Perceptionhash is enhanced.
|
|
|
|
### v1.0.3
|
|
- Add workflow for GithubAction
|
|
- Fix typo on the GoDoc for LoadImageHash
|
|
|
|
### v1.0.2
|
|
- go.mod is now used for install goimagehash
|
|
|
|
### v1.0.1
|
|
- Perception/ExtPerception hash creation times are reduced
|
|
|
|
### v1.0.0
|
|
**IMPORTANT**
|
|
goimagehash v1.0.0 does not have compatible with the before version for future features
|
|
|
|
- More flexible extended hash APIs are provided ([ExtAverageHash](https://godoc.org/github.com/corona10/goimagehash#ExtAverageHash), [ExtPerceptionHash](https://godoc.org/github.com/corona10/goimagehash#ExtPerceptionHash), [ExtDifferenceHash](https://godoc.org/github.com/corona10/goimagehash#ExtDifferenceHash))
|
|
- New serialization APIs are provided([ImageHash.Dump](https://godoc.org/github.com/corona10/goimagehash#ImageHash.Dump), [ExtImageHash.Dump](https://godoc.org/github.com/corona10/goimagehash#ExtImageHash.Dump))
|
|
- [ExtImageHashFromString](https://godoc.org/github.com/corona10/goimagehash#ExtImageHashFromString), [ImageHashFromString](https://godoc.org/github.com/corona10/goimagehash#ImageHashFromString) is deprecated and will be removed
|
|
- New deserialization APIs are provided([LoadImageHash](https://godoc.org/github.com/corona10/goimagehash#LoadImageHash), [LoadExtImageHash](https://godoc.org/github.com/corona10/goimagehash#LoadExtImageHash))
|
|
- Bits APIs are provided to measure actual bit size of hash
|
|
|
|
### v0.3.0
|
|
- Support DifferenceHashExtend.
|
|
- Support AverageHashExtend.
|
|
- Support PerceptionHashExtend by @TokyoWolFrog.
|
|
|
|
### v0.2.0
|
|
- Perception Hash is updated.
|
|
- Fix a critical bug of finding median value.
|
|
|
|
### v0.1.0
|
|
- Support Average hashing
|
|
- Support Difference hashing
|
|
- Support Perception hashing
|
|
- Use bits.OnesCount64 for computing Hamming distance by @dominikh
|
|
- Support hex serialization methods to ImageHash by @brunoro
|