Distance information obtaining method for temperature correction of thermal infrared imager

Abstract

The invention provides a distance information obtaining method for temperature correction of a thermal infrared imager. The distance information obtaining method comprises the following steps of: S1. installing the thermal infrared imager on a rotary platform, wherein the rotary platform is capable of rotating in the orientation direction and the pitching direction; S2. processing a digital elevation model by using a geometrical relationship according to position information of the thermal infrared imager in the space to obtain distances between the thermal infrared imager and an object on the earth surface along the direction of optical axis under various orientation angles and pitching angles. According to the distance information obtaining method, the distances between the thermal infrared imager and the object on the earth object along the direction of optical axis under various orientation angles and pitching angles can be calculated by using a method for calculating the distance between the object and the earth surface according to the position information of the thermal infrared imager in space and the digital elevation model of a working region of the thermal infrared imager.

Description

technical field [0001] The invention relates to a distance information acquisition method, in particular to a distance information acquisition method for temperature correction of an infrared thermal imager. Background technique [0002] Forest fire is the most dangerous enemy of the forest and the most terrible disaster of forestry. It will bring the most harmful and destructive consequences to the forest. Forest fires not only burnt patches of forest and harmed the animals in the forest, but also reduced the regeneration ability of the forest, caused soil barrenness and destroyed the forest's ability to conserve water, and even led to an imbalance in the ecological environment. Although science in today's world is advancing with each passing day, human beings have not yet made long-term progress in subduing forest fires. [0003] At present, most forest fire monitoring systems use visible light cameras to monitor forest fires, and use the color and texture of flames to id...

AI Technical Summary

Problems solved by technology

However, it is not advisable to use a laser rangefinder to measure the distance between the infrared thermal imager and the object to be photographed in the forest fire prevention monitoring system. In addition, the forest fire monitoring system needs to work 24 hours a day, and the lasers in the laser range finder are vulnerable parts, so the maintenance cost is also high; the second is that the laser range finder can only get one for each measurement. distance value, while the correction of the temperature image of the infrared thermal imager needs to know the distance value corresponding to each point from the ground object, so the laser range finder scheme will affect the accuracy of the temperature image correction

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