A novel high dynamic range image enhancement algorithm based on guided image filter
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- 作者：Ning Liu ; coolboy006@sohu.com" class="auth_mail" title="E-mail the corresponding author ; Yingying Zhang ; Jun Xie ; Jiahe Yu ; Hongyu Xiao ; Tianyu Min
- 关键词：Guided image filter ; High dynamic range ; Detail enhancement ; Gray scale adjustment
- 刊名：Optik - International Journal for Light and Electron Optics
- 出版年：2015
- 出版时间：December 2015
- 年：2015
- 卷：126
- 期：23
- 页码：4581-4585
- 全文大小：1855 K
文摘
The focal plane size of modern CCD/CMOS camera is getting bigger and bigger, that is to say, more and more pixels have been integrated on the focal plane array. Under this advance in technology, people can take a picture with higher resolution and higher dynamic range. The image contains much more information of the real world. A serious problem of dealing with such kind of image is that, although the image has high dynamic range, people cannot display all the information of it. Certain technologies have been applied on modern cameras to solve this problem, but they still have some defects. In this paper, we raised a novel high dynamic range image enhancement algorithm. This algorithm use the guided image filter to separate the image and deal with the detail layer as well as the base layer. The high frequency information needs to be enhanced to highlight the detail of the image on the detail layer. Meanwhile, the base layer controls the gray scale contrast which also needs to be processed with certain strategy. The color saturation can be controlled by both two layers. The raw high dynamic range image can be enhanced both through the detail layer and the base layer to improve its digital detail, gray scale rearranging and the color contrast. Detailed analysis of the procedure and figure demonstration have been illustrated in the paper to show the ability of this algorithm.