" class="reference-link">libgmsd

https://github.com/clunietp/libgmsd

Introduction

libgmsd is a portable C library and command-line tool for full-reference image quality assessment.

libgmsd is an implementation of the Gradient Magnitude Similarity Deviation (GMSD) algorithm by Xue, Zhang, Mou, and Bovik.
http://www4.comp.polyu.edu.hk/~cslzhang/IQA/GMSD/GMSD.htm

Features

• Cross-platform; tested MSVC17, GCC 4.6, Clang 5
• Efficient: ~12ms MSVC 15.8, ~6.5ms gcc -o3 (cygwin); 512x384 grayscale input on Core i5-4210U @ 1.7GHz
• No external dependencies
• Unit tested, valgrind clean
• Permissive license (MIT)

Usage

• Library: see include/libgmsd.h
• Command line: gmsd.exe "path/to/file1.bmp" "path/to/file2.bmp"
  • Input: 24BPP BMP; Output: GMSD value
  • Win32 command line binary: https://github.com/clunietp/libgmsd/raw/master/gmsd_win32.zip
• Tests: ./gmsd_tests

Tested compilers:

• MSVC 2017
• gcc 4.6
• clang 5

" class="reference-link">Tests

• Tests/benchmark included in /test/

Acknowledgements

http://www4.comp.polyu.edu.hk/~cslzhang/IQA/GMSD/GMSD.htm , Gradient Magnitude Similarity Deviation: A Highly Efficient Perceptual Image Quality Index by Xue, Zhang, Mou, Bovik

https://github.com/chazomaticus/libbmpread , tiny, fast bitmap (.bmp) image file loader by Charles Lindsay. Libbmpread is used in the test and command line apps for bmp input.