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 that the quaternion approach of image enhancement is an effective color image enhancement technique.
Abstract (translated)
在本文中，提出了一种增强方法的四元数方法，其中图像中的颜色被认为是单个实体。这种新方法被称为通过二维四元数离散傅里叶变换（2-D QDFT）随后进行空间变换的彩色图像增强的α-生根方法。通过2-D DFT将所提出的彩色图像增强方法的结果与其对应的逐信道增强算法进行比较。图像增强被量化为基于视觉感知的增强测量，其被称为颜色增强测量估计（CEME）。初步实验结果表明，图像增强的四元数方法是一种有效的彩色图像增强技术。
URL
https://arxiv.org/abs/1807.07960
