Infrared-camera-device-based adaptive control system

Abstract

The invention relates to an infrared-camera-device-based adaptive control system. A gain value of automatic gain control of an infrared camera device is obtained; if the gain value is larger than or equal to a preset first threshold value, the infrared camera device is controlled to start a black-and-white shooting mode; and the brightness of an infrared ray of the infrared camera device is adjusted in real time based on the gain value, so that the infrared camera device can adapt to an external shooting environment. According to the technical scheme, the black-and-white shooting mode can be started only by determining the gain value size corresponding to the current external shooting environment brightness information instead of setting a photoresistor, so that the infrared camera device can enter a night working state. Furthermore, the infrared camera device can adjust the brightness of the infrared ray based on changing of the external shooting environment, thereby avoiding an overexposure phenomenon, improving an image effect, and reducing power consumption of the infrared camera device.

Description

technical field [0001] The invention relates to the technical field of infrared camera automatic control, in particular to an adaptive control system based on an infrared camera device. Background technique [0002] Existing infrared cameras are generally composed of image sensors, image signal processors, microprocessors (such as single-chip microcomputers) and infrared lamp panels (including photoresistors), which can realize automatic switching between day and night working modes. The working method of this automatic switching is: since the photosensitive characteristics of the photoresistor on the infrared light board will change with the change of the ambient light brightness, the infrared light board will provide an analog voltage signal reflecting the change of the ambient light brightness to the single-chip microcomputer, the single-chip microcomputer The current ambient light brightness status is determined according to the analog voltage signal through AD sampling....

AI Technical Summary

Problems solved by technology

Although this working method realizes the automatic switching of day and night working modes, it still has certain defects, specifically including: one, adding a photoresistor on the infrared lamp board, on the one hand increases the cost, on the other hand due to the service life of the photoresistor itself, Quality, cut-off infrared light performance, etc., when the service life is long, the photoresistor itself will have a decrease in photosensitivity, insufficient cut-off infrared light, etc., resulting in inconsistent time points for day and night switching with the preset value, and may even occur due to photosensitive Oscillation phenomenon caused by the resistance itself

Second, the control of the infrared light by the single-chip microcomputer adopts the method of directly turning on and off the high and low levels, without algorithm control, which increases the overall power consumption of the infrared camera

Third, in some specific scenes, the phenomenon of overexposure of the picture due to the strong brightness of the infrared light will appear (for example, in the field test, within the normal distance range, the infrared camera directly illuminates the face, and sometimes the face will appear Overexposure phenomenon, affect the picture effect)

Images