Lighting control method and device based on image analysis
An image analysis and image technology, applied in the fields of image processing, video surveillance and security, can solve the problems of poor precision of photoresistors, adding circuit boards, unfavorable post-maintenance, etc., and achieve the effect of strong applicability and quality improvement
Active Publication Date: 2019-08-16
SHENZHEN QIANHAI INTELLIDATA TECH CO LTD
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Problems solved by technology
The accuracy of the photoresistor is poor, and the circuit board needs to be added, which is not conducive to later maintenance. Once the photoresistor is damaged, the photosensitive control lamp will not be able to be used
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[0075] Example, such as the maximum exposure time T em 6000ms, the first exposure threshold is 0.6, the first brightness threshold is 60, the second exposure threshold is 0.9, and the second brightness threshold is 90;
[0076] If the current exposure time T en It is 3000ms and the average brightness value of the judgment area is L a 150, 300060 at the same time, the control light is off;
[0077] If the current exposure time T en It is 3000ms and the average brightness value of the judgment area is L a It is 30, 3000<6000×0.6, but 30<60, the control light keeps the current state;
[0078] If the current exposure time T en It is 5500ms and the average brightness value of the judgment area is L a 30, 5500>6000×0.9, and 30<90 at the same time, the control light is turned on;
[0079] If the current exposure time T en It is 5500ms and the average brightness value of the judgment area is L a If it is 150, 5500>6000×0.9, but if 150>90, the control light will keep the curre...
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The present invention provides a method for controlling lights based on image analysis. The method includes: collecting continuous scene images; selecting the same position area in the continuous scene images, and acquiring the selected image of the same position area as the determination area; counting the first threshold value determination area Brightness value, and calculate the average brightness value; real-time access to the camera exposure time of the judgment area; judge the state of the control light. Counting the brightness values of the first threshold determination area and calculating the average brightness value includes: selecting continuous scene images of the first threshold value, and respectively obtaining the brightness values of the determination area; calculating and recording the average brightness value of the first threshold value of the determination area. Compared with the existing light control technology, the image analysis-based light control method and device of the present invention have strong applicability, and can effectively control lights without adding additional hardware equipment by using brightness and exposure time judgments. To improve the quality of image acquisition.
Description
technical field [0001] The invention relates to image processing, video monitoring and security protection, in particular to a method and device for controlling lamps based on image analysis. Background technique [0002] With the continuous development of social economy, there are more and more public lighting facilities such as road squares in cities and enterprises. However, most of these public lighting facilities are traditional control lights. Traditional control lamps are controlled by photoresistors, which are resistors whose resistance value changes with the intensity of incident light, which is made by using the photoconductive effect of semiconductors. When the incident light is strong, the resistance decreases, and when the incident light is weak, the resistance increases. Photoresistors are generally used for light measurement, light control and photoelectric conversion. Since different materials have different selective absorption of spectra, photoresistors c...
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IPC IPC(8): H05B37/02H04N5/235
CPCH05B47/10H04N23/73Y02B20/40
Inventor 焦军王宁康毅
Owner SHENZHEN QIANHAI INTELLIDATA TECH CO LTD