1. A new histogram equalization technique for contrast enhancement of grayscale images using the differential evolution algorithm.
- Author
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Rivera-Aguilar, Beatriz A., Cuevas, Erik, Pérez, Marco, Camarena, Octavio, and Rodríguez, Alma
- Subjects
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DIFFERENTIAL evolution , *IMAGE intensifiers , *COMPUTER vision , *HISTOGRAMS , *ALGORITHMS , *GRAYSCALE model , *THRESHOLDING algorithms - Abstract
Image contrast enhancement is a crucial computer vision step aiming to improve the quality of the visual information in processed images. In the literature, several proposed methods for image contrast enhancement are Histogram Equalization-based (HE) techniques that use one transformation function and optimize its parameters for mapping the pixels to new gray-intensity values. However, using only one transformation function would leave other enhancement options unexplored. Therefore, the proposed approach generates several transformation functions and selects the one that best improves the image's contrast. This method is based on the Differential Evolution (DE) algorithm, which produces multiple candidate solutions representing transformation functions. The transformation functions map the input pixel values in their enhanced versions to equalize the histogram and improve the image's contrast. Furthermore, a new formulation is proposed as the objective function based on the number of edge pixels, the intensity of the pixels, image entropy, and the number of gray intensity levels. The performance of this approach has been tested on low-contrast dataset images and compared to similar HE techniques, such as AVHEQ, BBHE, RSESIHE, MMBEBHE, and ESIHE. The results demonstrate the proposed algorithm's robustness and high performance in improving the grayscale images' contrast. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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