Image Contrast Enhancement Using a Modified Histogram Equalization

摘要

The histogram equalization is the basic technology in image processing, which is widely used to increase the integral contrast of the image and is characterized by high efficiency. However, known techniques of histogram equalization have a number of disadvantages, the major one of which is a decrease in the contrast of small objects in the image. To address this disadvantage, a new technique of modified histogram equalization is proposed based on the assessment of the two-dimensional probability distribution of brightness in the image. A new method of increasing the contrast of the image based on the modified equalization of histogram is also proposed. The proposed technique of modified histogram equalization can be recommended to increase the image contrast in automatic mode in imaging and image processing.