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Method and device for real-time input digital image mirroring storage

A digital image, real-time input technology, applied in image communication, color TV components, TV system components, etc., can solve problems such as excessive cache space, and achieve the effect of reducing occupancy

Inactive Publication Date: 2013-10-09
HANGZHOU SILAN MICROELECTRONICS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0012] but, image 3 The image data acquisition structure shown still does not solve the problem of excessive buffer space required for horizontal mirroring processing

Method used

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  • Method and device for real-time input digital image mirroring storage
  • Method and device for real-time input digital image mirroring storage
  • Method and device for real-time input digital image mirroring storage

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Embodiment Construction

[0046]In the image data acquisition system using FIFO, the pixel data is usually read out from the FIFO by means of direct memory access (DMA, Direct Memory Access), and then written into the system memory through the bus. Generally speaking, the parameters required for a DMA operation include a start address and a burst length (burst length), where the burst length is the number of consecutively read data in a DMA operation. Further, a DMA operation reads data from the FIFO The outburst length (denoted as BL in this article) pixel data is written into the continuous storage area starting from the start address.

[0047] For the horizontal image storage of real-time input pixel data, the present invention combines the characteristics of DMA operation and modifies the prior art’s scheme of adjusting the sequence of pixel data within the range of the entire row to the sequence of pixel data within the range of a burst length In addition, in conjunction with the horizontal mirror...

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Abstract

The invention provides a method and device for real-time input digital image mirroring storage. The method comprises the steps that digital image data are provided, wherein the digital image data comprise a plurality of rows, and each row comprises a plurality of pixel data; every BL pixel data in each row of pixel data are sorted according to inverted order, and the initial address of the BL pixel data is marked as a first address, wherein BL is the burst length of DMA; the BL pixel data which are sorted according to the inverted order are written into a first in first out storage; the BL pixel data which are arranged according to the inverted order are read from the first in first out storage in a DMA mode and stored, the storing initial address is marked as a second address, and the second address and the first address are in a horizontal mirroring relationship. By means of the method and device for real-time input digital image mirroring storage, horizontal mirroring operation can be realized through small cache space.

Description

technical field [0001] The invention relates to the technical field of video acquisition, in particular to a method and device for real-time input digital image image storage. Background technique [0002] Such as Figure 1a to Figure 1d As shown, mirroring operations on image data include horizontal mirroring and vertical mirroring, where Figure 1a for the original image, Figure 1b to mirror the image horizontally, Figure 1c is a vertically mirrored image, Figure 1d For images that are mirrored both horizontally and vertically. [0003] In terms of mathematical description, the original image is ORG_IMG(x,y), the width of the image is recorded as Width, and the height is recorded as Height. The horizontal mirror image is defined as HOR_MIR_IMG(x,y), and the vertical mirror image is VER_MIR_IMG(x,y) ). The image that is mirrored horizontally and vertically at the same time is HOR_VER_MIR_IMG(x,y), then: [0004] HOR_MIR_IMG(x,y)=ORG_IMG(Width-x,y), 0=<x<Width...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/374H04N5/378
Inventor 胡红旗徐向阳赵光焕李宜龙余柳冰
Owner HANGZHOU SILAN MICROELECTRONICS
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