gazosan

Detect difference between two images.

Gazo-san was rewritten in modern c++ (?) while making it faster. (This is my first time to write proper code in c++, so it may not be modern.)

It is at least 8 times faster as far as I can tell at hand.

Gazo-san(old)

~/w/r/g/l/gazo-san $ hyperfine --warmup 3 './bin/gazosan tests/images/test_image_new.png tests/images/test_image_old.png'
Benchmark 1: ./bin/gazosan tests/images/test_image_new.png tests/images/test_image_old.png
  Time (mean ± σ):      3.220 s ±  0.018 s    [User: 3.401 s, System: 0.263 s]
  Range (min … max):    3.187 s …  3.246 s    10 runs

gazosan(new)

~/w/gazo-san $ hyperfine --warmup 3 './build/gazosan -new tests/images/test_image_new.png -old tests/images/test_image_old.png'
Benchmark 1: ./build/gazosan -new tests/images/test_image_new.png -old tests/images/test_image_old.png
  Time (mean ± σ):     410.6 ms ±   7.1 ms    [User: 1194.8 ms, System: 155.6 ms]
    Range (min … max):   393.3 ms … 419.6 ms    10 runs

Run

Docker

docker run --rm -v $(pwd):/app ghcr.io/imishinist/gazosan gazosan -new tests/images/test_image_new.png -old tests/images/test_image_old.png -perf -create_change_image

Build

requirements

• OpenCV 4
• TBB

$ mkdir build; cd build
$ cmake -DCMAKE_BUILD_TYPE=Release ..
$ cmake --build .
$ cd ..
$ ls build
~/w/gazo-san $ ls build/
CMakeCache.txt      Makefile            gazosan
CMakeFiles          cmake_install.cmake

Input	Input
test_image_old.png	test_image_new.png

Output
output_diff.png

There is no test yet.

License

Apache 2.0 license

Contributors

(In alphabetical order)

• Akari Ikenoue
• Jye Ruey
• Naoto Kishino
• Rikiya Hikimochi
• Taisuke Miyazaki