Algorithmization of the Spatial Method of Image Enhancement Based on Aligning the Brightness Histograms
Aleksey D. Poudalov, Michael V. Piltsov, Vladimir G. Mazur · 2018 XIV International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering (APEIE) · 2018
A detailed analysis and description of the algorithm of the spatial method of image enhancement is carried out on the basis of alignment of their brightness histograms. There is an increasing use of photo and video equipment, as well as image processing methods in various branches of human activity. Also, all stages of processing images that are necessary for extracting useful information from them are discussed in detail, while the stage of image enhancement is of particular importance, since the quality of all subsequent stages, such as segmentation and analysis, depends on it. It is noted that such a simple and effective method of image enhancement, which is based on the alignment of brightness histogram, from the point of view of its practical application, is rather poorly described in the specialized literature. To eliminate this gap, the theory on which this method is based was described in detail, and an algorithm implementing it was proposed and described. To verify the correctness of the proposed algorithm, it was implemented in Python 2.7 and tested on various images. The experiment showed that this algorithm improves the image as well as its implementation in the OpenCV computer vision library and the MATLAB package.