Image acquisition method and system suitable for high-speed moving target

Abstract

The invention provides an image acquisition method and system suitable for a high-speed moving target. The system comprises an IR transceiver module, an image processing system, a ferroelectric liquidcrystal modulation light valve, and a light valve control unit; the IR transceiver module is equipped with a laser emitter, an imaging lens assembly and an optical receiver and is used for generatingand transmitting a plurality of infrared beams to a shot target, detecting a plurality of reflection beams, and acquiring point cloud information of a channel in which each infrared beam is located;the image processing system is used for acquiring a depth image of the shot object according to the point cloud information; the ferroelectric liquid crystal modulation light valve is disposed beforea CMOS sensor; and the light valve control unit is used for controlling the transmission and blocking state of the ferroelectric liquid crystal modulation light valve so as to control the exposure time of a photosensitive array of the CMOS sensor. According to the method and system in the invention, an ultra-high speed light valve based on smectic phase ferroelectric liquid crystal is arranged before a structural end of infrared laser imaging, so that distance data of each locus of a moving object can be obtained in the instantaneous displacement at a microsecond imaging speed, and undistorteddepth images are continuously reconstructed based on the distance data.

Description

technical field [0001] The invention relates to the technical field of image acquisition and processing, in particular to the image acquisition of high-speed moving objects, and in particular to an image acquisition method and system suitable for high-speed moving objects. Background technique [0002] At present, CMOS image sensors are used for static image capture of infrared cameras or 3D cameras. When acquiring, due to the difference in scanning time of the CMOS photosensitive exposure array, and the CMOS exposure time is continuous, the read data delay causes image distortion, which will lead to image distortion, resulting in unsatisfactory image shooting effects, such as blurred pictures or Motion smearing and so on. At the same time, traditional infrared laser imaging also has the problem of interference from adjacent cars with the same modulated infrared spectrum signal. [0003] Various solutions to this image distortion problem have been proposed in the prior art...

AI Technical Summary

Problems solved by technology

[0002] At present, CMOS image sensors are used for static image capture of infrared cameras or 3D cameras. When acquiring, due to the difference in scanning time of the CMOS photosensitive exposure array, and the CMOS exposure time is continuous, the read data delay causes image distortion, which will lead to image distortion, resulting in unsatisfactory image shooting effects, such as blurred pictures or Sports tailing and other phenomena

At the same time, traditional infrared laser imaging also has the problem of interference from adjacent vehicles with the same modulated infrared spectrum signal

[0003] Various solutions to this image distortion problem have been proposed in the prior art, such as using electronic compensation or electronic valve post-processing operations to process data reading and compensate for image distortion. However, due to the high integration and complex structure of CMOS image sensors, in each Amplifiers are integrated on each pixel and most of the signal processing circuits are produced on the same chip as CMOS, such as video signal processing and still image processing, so that the cost and effect of solving motion distortion in this way cannot achieve the desired ideal effect. At the same time, we Seeing that the compensation calculation algorithm itself is also complex, it also causes unsatisfactory results

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