Extration method of real time floating threshold

An extraction method and floating threshold technology, which are applied to TV, color TV parts, electrical components, etc., can solve problems such as difficulty in selecting threshold values, and achieve real-time performance, good image segmentation effect, and strong applicability.

Inactive Publication Date: 2006-09-20
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology

However, due to the influence of factors such as noise interference in the actual image, the histogram usually has a single peak or a wide and flat peak and valley.
At this time, the optimal threshold may often appear on the "shoulder" of the image histogram, so it is difficult to select the threshold directly based on the peak and valley of the histogram

Method used

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  • Extration method of real time floating threshold
  • Extration method of real time floating threshold

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0017] The present invention adopts the method of line background sampling to select the cutting threshold, specifically: in the line direction, the level at the back edge of the wave gate is extracted as the background level of the line, and the background level is used as the cutting threshold to cut the line. video signal. Its electric control device such as figure 1 , 2 As shown, it consists of a gain control circuit, a sampling pulse forming circuit, a line background sampling circuit, and video amplification, shot-following drive, background subtraction, video amplification with controllable gain, and driving parts. This embodiment uses the gain control circuit N8 respectively. , sampling pulse forming circuit N1, line background sampling circuit N3, and video amplifier N2, shot follower driver N4, background subtractor N5, video ampl...

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Abstract

The method is used for extracting an instant floating threshold of a binarization segmentation threshold level. It uses background sampling approach to select a segmentation threshold and comprises: along the row direction, extracting the level at rear edge of gate as the background level of current row; the said background level is taken as the segmentation threshold to segment the video of the said row.

Description

technical field [0001] The invention is applied to video image processing, especially for the real-time floating threshold extraction method of binarized segmentation threshold level under complex background conditions. Background technique [0002] In video image processing, it is often necessary to extract the target to be tracked from the background. Reliable and accurate extraction of the background level is the prerequisite for reliable detection of the target. There are many methods for extracting background, such as fixed threshold method, histogram statistics method, field background sampling method, etc. [0003] The fixed threshold method is relatively simple. According to experience or certain rules, a fixed segmentation threshold T is selected, and the entire image is cut with this threshold. This method can be applied to occasions where the contrast between the target and the background is strong and the contrast is relatively fixed. It is generally used in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/14
Inventor 肖阳辉
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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