期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2014
卷号：3
期号：4
页码：1107-1112
出版社：Shri Pannalal Research Institute of Technolgy
摘要：One of the ultimate aims of image processing is to represent real-world scenes on conventional display devices. For this purpose, image-processing technology has been developing from Standard Definition (SD) to High Definition (HD) in terms of resolution, as well as being developed from the Low Dynamic Range (LDR) of 8-bit data to the High Dynamic Range. Many recent computational photography techniques decompose an image into a piecewise smooth base layer, containing large scale variations in intensity, and a residual detail layer capturing the smaller scale details in the image. In many of these applications, it is important to control the spatial scale of the extracted details, and it is often desirable to manipulate details at multiple scales, while avoiding visual artifacts. In this work a new way to construct edge-preserving multi-scale image decompositions is introduced A novel filter is proposed for edge-preserving decomposition of an image. It is different from previous filters in its locally adaptive property. A multiscale decomposition with this filter is proposed for manipulating a high dynamic range image, which has three detail layers and one base layer. A process is proposed with the novel filter to reproduce HDR images. There is an important property in the decomposition, which is the residual base layer matches the large-scale shape of the original image signal. The tone mapped images using these edge-preserving filters give state-of-the-art quality, and they are visually appealing. Through this reproduction process, we can hardly discern the difference between the artificial image and the real scene. Special considerations are also noted here to avoid artifacts (e.g., halo, the brighter or darker bands around edges).
关键词：High Dynamic Range; Multiscale Decom position; ; Edge Preservation; Tone Mapping; Small Area Edge ; Preservation
