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Diminished image digital filtering method and device

A digital filtering and image technology, applied in the field of image processing, can solve the problems of large storage medium consumption, increase of line buffer units, etc., and achieve the effect of saving cache space

Inactive Publication Date: 2008-10-15
NEW H3C TECH CO LTD
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Problems solved by technology

[0005] But when figure 1 In the shown solution of using hardware architecture to realize image reduction, four line buffer units are required, and the number of required line buffer units increases with the order of the FIR filter, that is, the existing hardware architecture implements The image reduction scheme requires a large amount of storage media

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  • Diminished image digital filtering method and device
  • Diminished image digital filtering method and device

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Embodiment Construction

[0036]The core idea of ​​the present invention is: according to the vertical width of the source image and the target image, the source image data is grouped in the vertical direction, and then the following steps are performed for each group of current source image data in the source image data: according to the source image and The horizontal width of the target image, perform horizontal filtering on the first line of data in the current source image data, and save the result data after horizontal filtering in the cache unit; according to the horizontal width of the source image and the target image, the current source image The next line of data in the data is subjected to horizontal filtering processing, and the result data after horizontal filtering is added to the data in the buffer unit in one-to-one correspondence, and the original data in the buffer unit is overwritten with the added result data ; So until the last line of the current source image data; output the data...

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Abstract

The invention discloses a digital filtering method for image zooming-out, comprising that: a first line of data in the current source image data is carried out the horizontal filtering treatment according to the horizontal widths of the source image and a target image, the result data is saved in a cache unit; the next line of the data in the current source image data is carried out the horizontal filtering treatment according to the horizontal widths of the source image and the target image, the result data is correspondingly added with the data in the cache unit one by one, the result data after the adding is covered on the original data in the cache unit; the process is carried out like this till the last line of the data in the current source image; and the data in the cache unit is output as the data of the target image of the data of the current source image. The technical proposal of the invention does not need to consume a lot of storage media.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a digital filtering method and device for shrinking images. Background technique [0002] In applications such as video surveillance and video conferencing, it is often necessary to perform image resolution conversion processing due to different display terminals. One of the most important types of processing is to reduce the resolution of the input image, thereby reducing the entire image. Then multiple reduced images are spliced ​​and displayed in one screen. In order to complete image reduction, there are two common ways: one is based on software, and the other is based on hardware structure. [0003] The software-based image reduction technology is more flexible, and complex algorithms can be used, including filtering algorithms, boundary search, and then feathering algorithms. The image quality obtained by these algorithms is relatively high, but the disadvantage ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40H03H17/02H04N7/18H04N7/15
Inventor 晋兆虎俞柏峰
Owner NEW H3C TECH CO LTD
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