Method and apparatus for integrating multiple 1-D filters into a digital image stream interface
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United States of America Patent
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Jul 15, 2003
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N/A
app pub date -
May 14, 1998
filing date -
May 14, 1998
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Abstract
In a method of integrating one or more l-dimensional filters into a digital image stream interface a single digital video input is processed by multiple 1-dimensional digital image filters, especially recursive filters, and combined into a single digital image stream which can be transmitted via a high-speed interface to a host computer's memory such that each 1-dimensional filter output can be automatically extracted and placed into its own separate memory buffer for subsequent processing by a secondary image processing device. This additional processing can include the second pass of a two-pass separable filter implemented in software on a general-purpose CPU, and in particular can result in the generation of an image pyramid. This combined hardware and software approach can produce low-cost 2-D digital image filter implementations small enough to be added to existing standard ASIC's while still retaining high performance.
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