People counting method based on combination of visible light camera and thermal imager

Abstract

The invention discloses a people counting method based on the combination of a visible light camera and a thermal imager, and the method comprises the steps: firstly carrying out the calibration and installation position measurement of camera equipment, and finding out the mapping relation between images; respectively detecting human head positions in the visible light image and the infrared imagethrough a recognition algorithm; and finally, judging and screening according to the identified multimode features of the human head target candidate region through the image mapping relationship, and returning a people counting result after determining that the human head is the human head. According to the method, human body thermal radiation characteristics are utilized to remove false identification of a visible light image, the visual blind area of the visible light camera is made up, the defect that the resolution of the thermal infrared imager camera is low is overcome, the method achieves effective mutual complementation on the visible light band and the infrared band, and the recognition accuracy of the people counting algorithm is greatly improved.

Description

technical field [0001] The invention relates to the field of computer vision, in particular to a people counting method based on the combination of a visible light camera and a thermal imager. Background technique [0002] In the night patrol tasks of prisons and detention centers, it is necessary to count the number of people inside the cell. At present, the number of people is generally counted manually, which requires a lot of work and takes a lot of time. For this reason, people have begun to explore the use of computer image recognition technology. To count the number of people, but due to the particularity of the environment of prisons and detention centers, the accuracy and robustness of the people counting algorithm are required to be very high, and the recognition accuracy rate is required to reach more than 95%. Algorithms pose certain challenges. [0003] At present, due to the low installation position of the visible light camera in the cell, there are situation...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a visible light camera based on the problem that the overlap and occlusion of personnel cannot be well identified when the visible light camera is used to count the number of people, resulting in a low recognition accuracy rate of the people counting algorithm. A people counting method combined with a thermal imager. This method simultaneously collects image information of the prison room through a visible light camera and an infrared thermal imager camera, and recognizes, processes and judges the visible light image and the infrared image, and realizes the monitoring in the visible light band and the infrared band. Effectively complement each other, which can effectively improve the recognition accuracy of the people counting algorithm

Images