Fast LOG Filtering Using Recursive Filters

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文件名称：Fast LOG Filtering Using Recursive Filters
文件大小：584KB
文件格式：PDF
更新时间：2014-10-31 05:13:21
Recursive Filters Marr and Hildreth's theory of LoG filtering with multiple scales has been extensively elaborated. One problem with LoG filtering is that it is very time-consuming, especially with a large size of filters. This paper presents a recursive convolution scheme for LoG filtering and a fast algorithm to extract zero-crossings. It has a constant computational complexity per pixel and is independent of the size of the filter. A line buffer is used to determine the locations of zero-crossings along with filtering hence avoiding the need for an additional convolution and extra memory units. Various images have been tested