A kind of shutterless thermal imaging camera based on vox detector and its application method

Abstract

The invention relates to a zero shutter thermal infrared imager based on a voice operated exchange (VOX) detector. The zero shutter thermal infrared imager based on the VOX detector comprises a high-low temperature chamber and a machine core, wherein a monitor, a computer and a power source are respectively connected with the machine core. The use method of the thermal infrared imager includes the following steps: collecting original images; forecasting a background; revising a point 2 and a point 1; and performing image enhancement display processing. Compared with a usual shutter revision method, the zero shutter thermal infrared imager based on the VOX detector and the use method thereof can effectively reduce the size and the power consumption of an infrared machine core, are unlike a conventional method in which a shutter needs to be used to obtain uniform images at every time of revision, and use the original images as background images to revise, and therefore system design is simplified greatly, the size and the power consumption are reduced, and simultaneously due to zero shutter design, the problems of uneven images caused by heat emitting of the shutter and the like are avoided.

Description

technical field [0001] The invention belongs to the technical field of infrared imaging, and in particular relates to a shutterless infrared thermal imager based on a VOx detector and a use method thereof. Background technique [0002] The history of uncooled thermal imaging. Camera tubes made of infrared pyroelectric materials appeared in the early days, and thermal televisions were made. However, the sensitivity is too low, and the image smear phenomenon is serious, so it has not been widely used. It was used in industrial thermal imaging in the 1980s and 1990s. However, although this generation of thermal imaging general-purpose components has been widely used, it has been found to have serious shortcomings: high cost, difficult maintenance and logistics support (refrigeration), and poor reliability. Therefore, the national militaries of the United Kingdom and the United States have formulated plans to develop uncooled thermal imaging, with the aim of developing therma...

AI Technical Summary

Problems solved by technology

However, although this generation of thermal imaging general-purpose components has been widely used, it has been found to have serious shortcomings: high cost, difficult maintenance and logistics support (refrigeration), and poor reliability

[0007] The shortcomings of these correction methods are residual errors, and the residual errors are related to the temperature of the detector and the shutter. The residual errors appear as a layer of noise on the video, which affects the performance and application of the thermal imager.

[0008] Analyze the two types of non-uniformity correction methods in the past, calibration-based correction methods, such as the two-point method, due to the response drift of IRFPA, the actual correction needs to use a uniform reference source as the shutter, and periodically collect surface source blackbody images as the background The frame is used for calibration, otherwise there will be a large residual error after correction; the adaptive correction method based on the scene class, such as the neural network correction method, requires a large amount of calculation when applied, which is not conducive to the real-time processing of the system, and often still after correction. Problems such as target degradation and artifacts can occur

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