Image Enhancement: A Review

Abstract

Image enhancement is the main function in image processing. Different image enhancement techniques exist in the literature. The goal of image enhancement technique is to improve the quality and characteristics of image in such a way that the important information of image is easily extracted. The contrast enhancement techniques are useful in various medical image modality, such as X-ray, MRI, ultrasound, PET, SPECT, etc. Enhancement process is performed on original image to improve the quality of visibility and it is applied in various domains such as spatial, frequency and fuzzy domain. By the process of enhancement of the image become more convenient than original image. The main objective of this process is to improve the quality of image in different medical imaging modality in different domain. Here, we show the importance of enhancement technique which is used in various field.