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Method and device for determining parameters used in compensation processing of video signals

A technology for compensating parameters and video signals, applied in color signal processing circuits, color TV components, TV system components, etc., can solve the problem of low matching degree of analog video signals

Active Publication Date: 2017-12-19
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a method and device for determining parameters used for compensation processing of video signals, which are used to solve the matching degree between the compensation of the analog video signal by the equalizer and the attenuation of the analog video signal in the prior art not high problem

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  • Method and device for determining parameters used in compensation processing of video signals
  • Method and device for determining parameters used in compensation processing of video signals
  • Method and device for determining parameters used in compensation processing of video signals

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Embodiment 2

[0139] Embodiment 2. For the process in the training mode provided by the embodiment of the present invention, see Figure 7 shown, including the following steps:

[0140] Step 71, after the video monitoring system is established, the video decoder judges whether to enter the training mode according to the received external instruction command;

[0141] If so, enter the training mode, and perform step 72 for each transmission channel (for transmitting the video signal collected by the front-end video generator to the corresponding equalizer);

[0142] If not, then enter the working mode, and execute step 77;

[0143] Step 72, the video decoder controls the video generator to enter the training mode through the coaxial cable;

[0144] Step 73, the video generator sends the test image to the equalizer in real time;

[0145] Step 74, the video decoder adjusts the compensation parameters used by the equalizer for compensation;

[0146] Step 75, the video decoder analyzes the t...

Embodiment 3

[0151] Embodiment 3. Based on the above embodiment 2, this embodiment describes the workflow of video decoder for image analysis, see Figure 8 shown, including the following steps:

[0152] Step 81, initialization.

[0153] After the video monitoring system enters the training mode, the image analysis unit of the video decoder first initializes the parameter configuration of the equalizer, and then closes the various image gain functions of the video decoder to ensure that the original image is transparently transmitted to the image analysis module for image analysis. Finally, the input video system is detected to determine the resolution of the image.

[0154] Step 82, adjusting the chromaticity compensation parameter of the equalizer.

[0155] The above process needs to call the analysis algorithm (the high-frequency chroma overflow check in the analysis algorithm is not enabled here) and call the color check algorithm, and analyze the test image output by the video decodin...

Embodiment 4

[0163] Embodiment 4, based on the above embodiment 3, the analysis algorithm is described in detail in this embodiment, see Figure 9 shown, including the following steps:

[0164] Step 901, initialization.

[0165] In this step, the upper limit and lower limit of the equalizer parameter configuration, the image detection algorithm adopted, and the size of each threshold for determining the best effect are determined;

[0166] Step 902, configure equalizer parameters.

[0167] In this step, the initial parameters or subsequent accumulation parameters are configured in the equalizer;

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Abstract

The invention discloses a method and a device for determining parameters used in compensation processing of video signals, which are used to solve the problem that the compensation of an analog video signal by an equalizer in the prior art does not match the attenuation of the analog video signal. The problem. The method includes: receiving the test image transmitted in real time through the transmission channel; using the parameter information configured for this compensation to perform compensation processing on the test image; judging that the test image after this compensation satisfies the set image effect detection condition , use the compensation parameters in the parameter information used in this compensation process as the compensation parameters used in normal operation; and when it is judged that the test image after compensation does not meet the set image effect detection conditions, restart Select the compensation parameter in the parameter information, and start the next compensation processing and detection of the compensated test image.

Description

technical field [0001] The present invention relates to the technical field of video monitoring, in particular to a method and device for determining parameters used for compensation processing of video signals. Background technique [0002] Video surveillance is an important part of the security system. The video surveillance system includes at least one camera 11, a video surveillance platform 12, and a transmission cable 13 that transmits the video signal collected by the camera 11 to the video surveillance platform 12. For its architecture, see figure 1 shown. The working process of the video surveillance system is as follows: each camera 11 collects analog video signals at the front end, and transmits the collected analog video signals to the video through a transmission cable 13 (such as network cables, coaxial video cables, etc.). The decoder 121 of the monitoring platform 12, the decoder 121 first decodes the received analog video signal, converts it into a format t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/18H04N5/14H04N9/64
Inventor 叶志成朱乘风杨银昌
Owner ZHEJIANG DAHUA TECH CO LTD