This is an image processing application & library built using C++ and Qt.
It contains set of the most common image processing algorithms and techniques, which are written with an emphasis on speed.
It uses internally the CPLibrary library, that contains many optimized algorithms, data structures and mathematical functions, and Qt for the GUI.
All the algorithms are implemented manually in the C++ language, and the GUI is implemented in the Qt framework.
- Supports loading, saving and processing binary, grey scale and color images.
- Showing image statistics (min, max, mean, standard deviation, histogram, etc.)
- Image processing algorithms (thresholding, filtering, edge detection, etc.)
- Filters:
- Linear: Spectral, Convolution, Gaussian, Laplacian, Sobel, Prewitt, Kirsch, Scharr, LoG, etc. It supports also custom filters, such user-defined Convolution operators and Spectral filters.
- Non-linear: Non-linear filters (Bilateral, Median, etc.)
- Thresholding: Binary, Otsu, Sauvola, etc.
- Edge detection: Canny, Laplacian, Sobel, Prewitt, Scharr, LoG, etc.
- Morphological: Erosion, Dilation, Opening, Closing, etc.
- Color: Color conversion, Color balance, etc.
- Noise: Gaussian, Pickle & Salt, Speckle, etc.
- Histogram: Histogram equalization, Histogram matching, etc.
- Thresholding: Adaptive, Otsu, Sauvola, etc.
- Padding: Padding, Cropping, etc.
- Filters:
- Supports mixing different algorithms and techniques, and applying them to the same image.
- Optimizing resource-heavy algorithms with smart data structures and algorithms, and using heuristics.
- Multi threading support for time-consuming algorithms, without sacrificing consistency.
- Easy to use, easy to understand, easy to modify, easy to extend.
It supports the following image formats:
- PBM: Portable Bitmap
- PGM: Portable Graymap
- PPM: Portable Pixmap
- To use the application, you need to install the Qt6 libraries. Note that it should be also compatible with Qt5, but that was not tested.
- To compile the application, you will need also to fork this repository, and compile it with the C++20 standard.
Here is a little demo of some results of the application:
In this example we will use the Sobel operator to detect the edges of the image.
In this example we will view the spectrum of our image, and will apply a spectral filter to it that will remove unwanted high frequencies.
This pipeline uses Jenkins hosted on an an EC2 instance ( with an Elastic IP ) . The main purpose is to package the application and create an AppImage that can run from any linux machine ( independant from the underlying distribution ). More information about the AppImage format here .
Note that
glibc2.35 is required to run this software ( since it's dynamically linked and not static. )
This stage is managed by jenkins. A webhook has been created so each push to the main branch will launch our pipeline. The repository will be cloned to a jenkins agent running a ubuntu 22.04 Docker image ( We use Qt 6 and GCC 20, to obtain the necessary dependencies easier we're using this version of ubuntu ).
In this stage we update the system and install the necessary dependencies to build the software.
In this stage we Build our software from source ( By running cmake to get the build files , and then make to create the executables ) . The result is an executable representing the entry point of our application, in addition to a few Test executables
In this stage we run the different tests. For simplicity we will save the results as part of the release notes ( which are going to be part of the release later on )
We start by getting the necessary packaging tools. We then package our main application. We add the necessary libraries and Qt plugins and then bundle them into one AppImage.
We use git-changelog-command-line to get the newest tag. This tool uses Conventional Commits to determine the new tag value. More information on conventional commits here
Finally, We create our Github Release, Tag the release and upload the binary.
