Modified Alpha-Rooting Color Image Enhancement Method on the Two Side 2-D Quaternion Discrete Fourier Transform and the 2-D Discrete Fourier Transform

Artyom M. Grigoryan1, Aparna John1 and Sos S. Agaian2, 1University of Texas at San Antonio, USA and 2City University of New York, USA

ABSTRACT

Color in an image is resolved to 3 or 4 color components and 2-Dimages of these components are stored in separate channels. Most of the color image enhancement algorithms are applied channel-by-channel on each image. But such a system of color image processing is not processing the original color. When a color image is represented as a quaternion image, processing is done in original colors. This paper proposes an implementation of the quaternion approach of enhancement algorithm for enhancing color images and is referred as the modified alpha-rooting by the two-dimensional quaternion discrete Fourier transform (2-D QDFT). Enhancement results of this proposed method are compared with the channel-by-channel image enhancement by the 2-D DFT. Enhancements in color images are quantitatively measured by the color enhancement measure estimation (CEME), which allows for selecting optimum parameters for processing by thegenetic algorithm. Enhancement of color images by the quaternion based method allows for obtaining images which are closer to the genuine representation of the real original color.  

KEYWORDS

Modified alpha-rooting, quaternion Fourier transform, color image enhancement 

Original Source URL: https://airccse.com/mathsj/papers/4217mathsj01.pdf

https://airccse.com/mathsj/vol4.html

========================================

Contact Us

Here's where you can reach us: mathsj@airccse.com or journalmathsj@yahoo.com

Submission System: https://airccse.com/submission/home.html