Hue Preserving Color Image Enhancement Using Multi-Scale Morphology
نویسندگان
چکیده
A multi-scale morphological algorithm for local contrast enhancement of color images is presented in this paper. The three color components are used to construct the magnitude image and the direction cosines of the color vectors at each pixel location. The contrast of the magnitude image is enhanced using multi-scale morphological filters. The enhanced red, green and blue channel images are obtained by combining the enhanced magnitude image with the old direction cosines. This hue preserving algorithm is tested on several color images and the results are compared with those of two other standard techniques.
منابع مشابه
RGB Color Cube-Based Histogram Specification for Hue-Preserving Color Image Enhancement
A large number of color image enhancement methods are based on the methods for grayscale image enhancement in which the main interest is contrast enhancement. However, since colors usually have three attributes, including hue, saturation and intensity of more than only one attribute of grayscale values, the naive application of the methods for grayscale images to color images often results in u...
متن کاملHue-preserving color image enhancement without gamut problem
The first step in many techniques for processing intensity and saturation in color images keeping hue unaltered is the transformation of the image data from RGB space to other color spaces such as LHS, HSI, YIQ, HSV, etc. Transforming from one space to another and processing in these spaces usually generate a gamut problem, i.e., the values of the variables may not be in their respective interv...
متن کاملMorphological rational multi-scale algorithm for color contrast enhancement
Contrast enhancement main goal consists on improving the image visual appearance but also it is used for providing a transformed image in order to segment it. In mathematical morphology several works have been derived from the framework theory for contrast enhancement proposed by Meyer and Serra. However, when working with images with a wide range of scene brightness, as for example when strong...
متن کاملImproved Color Reproduction by Hue Preservation in Integrated Multi-scale Retinex
Tone reproduction is now widely used in the field of HDR imaging and image enhancement, especially to provide the proper luminance, so that captured images give the same sensation as the real scene. As a result, a high contrast and naturalness of colors can be obtained. In recent studies on tone reproduction with the objective of reproducing natural looking colors in digital images, an integrat...
متن کاملColor Image Enhancement Using Particle Swarm Optimization (PSO)
Image enhancement is aimed to improve image quality by maximizing the information content in the input image. In this article a PSO based hue preserving color image enhancement technique is proposed. The process is as follows. Image enhancement is considered as an optimization problem and particle swarm optimization (PSO) is used to solve it. The quality of the intensity image is improved by a ...
متن کامل