"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 10, 2017

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Modification of the CLAHE method to compensate the influence of hydrometeors


V. A. Korotkov, K. V. Korotkov, E. P. Novichihin

Kotel'nikov Institute of Radio-engineering and Electronics of RAS, Fruazino Branch, Vvedensky Sq.1, Fryazino Moscow region 141120, Russia 


The paper is received on October 13, 2017


Abstract. The differentiation of objects on the images obtained in the open area, decreases with the presence of hydrometeors in the atmosphere. The degree of hydrometeors influence on the image of objects is not the same. It can cause false images (artifacts) to appear on the CLAHE-processed image. In this paper, a method is proposed that eliminates such artifacts. The purpose of this work is to increase the degree of the distinguishability of objects on the image which was distorted by hydrometeors. To achieve this goal, the results of the CLAHE method are compared with each other when different formats (RGB, HSV, and CIELAB) are used. In addition, the case of processing images with distortions, destroying the color balance, is considered.

The paper shows that the usage of preprocessing for a distorted image, allows compensating for possible artifacts, arising from the application of the CLAHE method. It is demonstrated that applying the CLAHE method for color RGB images to each color component of the image results in less dependence on the color of the fog (haze, dust, light) (compared to applying the CLAHE method to the HSV image).

Key words: hydrometeors, digital images, dynamic range, enhancement of contrast, improvement of distinguishability of objects.


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For citation:

V. A. Korotkov, K. V. Korotkov, E. P. Novichihin. Modification of the CLAHE method to compensate the influence of hydrometeors. Zhurnal Radioelektroniki - Journal of Radio Electronics, 2017, No. 10. Available at http://jre.cplire.ru/jre/oct17/10/text.pdf. (In Russian)