Contrast Enhancing by Applying Histogram Analysis in Image Processing

The quality of images is influenced by the distortion, brightness and contrast of the acquired images. Understanding the image’s histogram is probably the most important element when working with images. The histogram shows whether the exposure of the image is correct, whether light is hard or soft and what changes could be made to obtain a better image. Three algorithms have been studied for enhancing digital images’ contrast. All algorithms are applicable to color images as well. Results show that selecting appropriate numerical methods for image processing is a key factor in achieving the goals.