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Bidimonsional digit filter

A dimensional digital and filter technology, which is applied in digital technology networks, instruments, scientific instruments, etc., can solve the problems of inconvenient use of image information processing systems, large image data delay, and high price, and achieve simple structure and stable operation Reliable, low-cost results

Inactive Publication Date: 2007-02-07
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Description
  • Claims
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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art that image data has a large time delay, is difficult to apply to an image information processing system with high real-time requirements, is inconvenient to use, needs peripheral circuit support, and is expensive, the purpose of the present invention is to provide a A two-dimensional digital filter that realizes real-time two-dimensional image filtering on a general-purpose CPLD device. The real-time performance of this hardware technology fully reaches the video rate. The filter structure is reconfigurable and supports on-site modification of filter parameters. It is flexible and convenient to use. low cost

Method used

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0021] The present invention takes complex programmable logic device (CPLD) as the core, and its input end is respectively connected with digital image signal, 10M clock signal and HD line synchronous signal. After the received digital image signal is processed by real-time two-dimensional digital filtering through the program, it is sent to the tracker or data recording device through the output terminal.

[0022] exist figure 1 In the process, the digital image signal is sent to the data buffer circuit to form a 5×512byte real-time data stream, which is then passed through 5-level latch to generate 5×5 data nodes and sent to the filtering operation module. The desired real-time data stream output is obtained after operation by the arithmetic unit.

[0023] exist figure 2 In the shown embodiment, the random access memory RAM realized by t...

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Abstract

This invention belongs to real time image process technology, especially discloses a two-dimension digital processor for real time preprocessing video image at video rate. Which uses complex programmable logic device(CPLD) as kernel wherein the input port connected with digital signal, 10M clock signal and HD horizontal synchronous signal, making real time two-dimension digital processing through program to received digital image signal, the sent through output port to tracker or data recorder. Said invention supports various kinds of image filter pattern and can be widely used in television tracker, infrared image tracker etc high image processor and computer vision.

Description

technical field [0001] The invention belongs to real-time image processing technology, which is applied to high-speed real-time image processing devices such as TV trackers and infrared image trackers, and can also be applied to fields such as computer vision. Specifically, a two-dimensional digital filter for real-time preprocessing of video images at video rates. Background technique [0002] In a TV or infrared image tracker, especially for infrared images with low signal-to-noise ratio, image filtering is a necessary preprocessing link. Its basic purpose is to reduce image noise and highlight target signals. It belongs to underlying processing. The ideal filter is usually a two-dimensional digital filter, and real-time performance is the key issue. The existing two-dimensional digital filter usually adopts the following technologies: First, store the real-time digital image in the frame memory in the form of data array, and then output the filtered image at a speed low...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/21G01T1/00H03H17/00
Inventor 王继东史泽林罗海波
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI