Laplacian-Pyramid

This library implements the laplacian-pyramid concept described in the paper "The Laplacian Pyramid as a Compact Image Code".

For usage have a look at laplacian_pyramid_test.cpp or on the below code snippet.

#include <laplacian-pyramid/laplacian_pyramid.hpp>

int main(int argc, char* argv[]) {

    cv::Mat image = cv::imread("resources/lena.png", cv::IMREAD_GRAYSCALE);
    cv::imshow("Original", image);
    
    image.convertTo(image, CV_32F);
    
    auto pyramid = laplacian::LaplacianPyramid{image, 5}; // Pyramid creation
    auto decoded = pyramid.decode(); // Decoding into cv::Mat
    
    decoded.convertTo(decoded, CV_8U);
    cv::imshow("Decoded", decoded);
    cv::waitKey(0);

    return 0;
}

Build and run

The library is built as a shared-lib with a minimum required CMake-Version of 3.15.1.
Tested platforms:

• Windows 10 / MSVC 14.29.30133

Recommended usage in cmake:

include(FetchContent)

option(LAPLACIAN_PYRAMID_BUILD_TEST "" OFF)
option(LAPLACIAN_PYRAMID_BUILD_DOCUMENTATION "" OFF)
option(LAPLACIAN_PYRAMID_BUILD_CODE_DOCUMENTATION "" OFF)
option(LAPLACIAN_PYRAMID_BUILD_EXT_LIBS "" OFF)

FetchContent_Declare(
        laplacian_pyramid
        GIT_REPOSITORY https://github.com/LucaRitz/laplacian-pyramid
        GIT_TAG        main
)
FetchContent_MakeAvailable(laplacian_pyramid)

unset(LAPLACIAN_PYRAMID_BUILD_TEST)
unset(LAPLACIAN_PYRAMID_BUILD_DOCUMENTATION)
unset(LAPLACIAN_PYRAMID_BUILD_CODE_DOCUMENTATION)
unset(LAPLACIAN_PYRAMID_BUILD_EXT_LIBS)

For an example setup of a project, have a look at laplacian-pyramid-test

Note that the cmake variables "OpenCV_LIBS" and "OpenCV_INCLUDE_DIRS" have to be known as soon as the above cmake snippet gets executed. This means you have to call the "find_package" command for opencv previously.