A strip pattern detection method and device
A detection method and detection device technology, applied in image communication, television, electrical components, etc., can solve the problems of not being able to judge the color bar pattern, no longer considering the color bar chroma information, etc., and achieve the effect of improving accuracy
Active Publication Date: 2018-10-12
ARKMICRO TECH
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Problems solved by technology
This method no longer considers the chromaticity information of the color bar, and avoids misjudgment caused by the chromaticity difference caused by different video input sources. However, this method can only judge the standard fixed-order color bar pattern. When the input color bar width is different The latter method also cannot judge the color bar pattern
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[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0024] Such as figure 1 As shown, it is a step diagram of a strip pattern detection method according to an embodiment of the present invention. The detection method of this embodiment includes the following steps:
[0025] S100: converting the image format of the measured pattern into a YUV format;
[0026] Specifically, because the input formats of the measured pattern sources are different, it is necessary to uniformly convert the video images of various formats into the YUV format to obtain the brightness Y and chromaticity C, which is convenient for the processing in the subsequent steps. The YUV format includes YUV420, YUV422, etc.
[0027] S200: horizontally scan the converted measured pattern, and search for boundary points;
[0028] Specifically, this step can be implemented according to the boundary search algorithm, for example, i...
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The invention discloses a bar pattern detection method and device. The method comprises the steps of: converting an image format of a pattern to be detected into a YUV format; horizontally scanning a converted pattern to be detected to search for boundary points; setting a target width of a bar area to be a horizontal coordinate spacing between adjacent boundary points; calculating the difference value one by one and line by line between the horizontal coordinate spacing of adjacent boundary points and the target width, calculating whether the difference value of each line is within a preset range, determining the line to be consistent with bar pattern characteristics if yes; determining the detected pattern to be a bar pattern if the number of lines exceeding a preset proportion is consistent with the bar pattern characteristics; or determining the detected pattern to be a non-bar pattern. According to the invention, the method does not select a fixed target width, can be used for detecting the bar pattern of any order, and detecting all scanning lines of each frame of image, and improves the accuracy of determining bar patterns.
Description
technical field [0001] The invention relates to the technical field of image detection, in particular to a strip pattern detection method and device. Background technique [0002] At present, in the field of image processing technology, strip test patterns such as color bars and gray scales are widely used. In the process involving TV signal processing, for example, from the production of TV programs to transmission and reception, including the production or maintenance of TV equipment, patterns such as color bars and gray scales are often used. In addition, color bars and grayscale images are more commonly used in scenarios where DVD players, cameras, video doorbell monitors, car reversing displays, etc. are applied to CVBS (Composite Video Broadcast Signal, composite video broadcast signal) signals. [0003] Through the input color bar and grayscale image, it is more convenient and intuitive to understand the operation of the equipment. Engineers can perform color correct...
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IPC IPC(8): H04N17/00
Inventor 袁扬智刘俊秀严卫健石岭
Owner ARKMICRO TECH