## libfastimagehash

[![CodeFactor](https://www.codefactor.io/repository/github/simon987/fastimagehash/badge/master)](https://www.codefactor.io/repository/github/simon987/fastimagehash/overview/master)
[![GitHub license](https://img.shields.io/github/license/simon987/fastimagehash)](https://github.com/simon987/fastimagehash/blob/master/LICENSE)

*WIP: Not ready for production use!*

`libfastimagehash` is a [imagehash](https://github.com/JohannesBuchner/imagehash/) 
replacement for C/C++.


<p align="center">
  <img src="bench/results/phash_large.png"/>
</p>

*[\*benchmarks](bench/)*

### Example usage

```C++
#include "fastimagehash.h"

int main() {
    // TODO
}
```

### Build from source

// TODO

**Built with** 
* [opencv](https://github.com/opencv) for image decoding & resizing
* [wavelib](https://github.com/rafat/wavelib) for wavelet decomposition in `whash`  (With [additional CFLAGS](https://github.com/simon987/wavelib/commit/8d05b0b7321271b05365d3e89bfb0fd5a26d68a6))
* [fftw3](http://fftw.org/) for DCT in `phash`
* [google/benchmark](https://github.com/google/benchmark) to measure performance

**Disclaimer**: The methods used to compute the image hashes
are identical to the `imagehash` python library, however, due to
some slight differences in the way OpenCV vs Pillow images are resized,
the final image hashes are not always exactly the same.