README.md

cuda-median-filter

C++ median filter for images using OpenCV, with CUDA for GPU acceleration

openCV installation

install CV ubuntu

sudo apt update
sudo apt install libopencv-dev

run test

compile and run the run_test.cu to check the speed up and functionality test

nvcc -O3 -o out/run_test source/run_test.cu `pkg-config --cflags --libs opencv4` --disable-warnings && ./out/run_test

output

openCV version: 4.6.0
generating a small random gray image:
87      59      43      180
74      151     112     137
110     187     82      85
78      163     58      160
filter size: 5
applying gray median filter on the image:
87      87      87      137
87      87      110     137
78      87      112     151
78      85      137     160
generating a large random gray image
median filter on cpu: 35102     ms
median filter on cuda: 189      ms
matching pictures test? [TRUE]
speed up: 185x

use median filter

compile

## run all the commands on the main directory
compile the code

 nvcc -O3 -o out/main source/main_cuda.cu `pkg-config --cflags --libs opencv4` --disable-warnings

using the filter

original image

gray with filter size 3 -> gray3.png

./out/main ./doc/image.png ./doc/gray3.png 3

gray with filter size 5 -> gray5.png

./out/main ./doc/image.png ./doc/gray5.png 5

colorful with filter size 3 -> color3.png

./out/main ./doc/image.png ./doc/colorful3.png 3 true

colorful with filter size 5 -> color5.png

./out/main ./doc/image.png ./doc/colorful5.png 5 true