Paper Title : Alpha-Rooting Color Image Enhancement Method by Two-Side 2-D Quaternion Discrete Fourier Transform Followed by Spatial Transformation
Paper Title : Alpha-Rooting Color Image Enhancement Method by Two-Side 2-D Quaternion Discrete Fourier Transform Followed by Spatial Transformation Author's Details : Artyom M. Grigoryan1, Aparna John1 and Sos S. Agaian2, 1University of Texas at San Antonio, USA and 2City University of New York / CSI, USA ABSTRACT In this paper a quaternion approach of enhancement method is proposed in which color in the image is considered as a single entity. This new method is referred as the alpha-rooting method of color image enhancement by the two-dimensional quaternion discrete Fourier transform (2-D QDFT) followed by a spatial transformation. The results of the proposed color image enhancement method are compared with its counterpart channel-by-channel enhancement algorithm by the 2-D DFT. The image enhancements are quantified to the enhancement measure that is based on visual perception referred as the color enhancement measure estimation (CEME). The preliminary experiment results show tha...