A high dynamic imaging module based on dmd dynamic spectroscopic

Abstract

The invention relates to a high dynamic imaging module based on DMD dynamic light splitting. Including DMD-based high dynamic imaging module hardware, optical path control software and image fusion software. The target light enters the main mirror, after being reflected by the dynamic spectroscopic device, after passing through the adapter, the dynamic light intensity adjustable mechanism, and the position sensor, the image is collected by the camera, and then transmitted to the computer for parameter calculation and compensation after passing through the DMD spatial light modulator. High dynamic range images; the adapter can dynamically adjust the split ratio area to the camera target surface according to different imaging tasks; combined with image fusion and enhancement processing algorithms, a "primary mirror + adapter + multi-camera" optical path structure is formed. The optical path structure can The provided dynamic range reaches 136dB, and the overall dynamic range of the system will be greater than 150dB, realizing high dynamic range imaging of the target. The DMD device is used to realize the compactness of the light-splitting structure, and realize the dynamic light-splitting of the whole and sub-regions. Solve the technical problem of simultaneous high-quality imaging of the rocket body and flame in the shooting range.

Description

technical field [0001] The invention relates to the field of high dynamic imaging of sensors, in particular to a high dynamic imaging module based on DMD dynamic light splitting. The module is composed of DMD-based dynamic spectroscopic device and hardware modules of interchangeable sensor adapters, as well as software modules such as optical path control and image fusion. Through the combination of the main mirror, multiple adapters and multiple cameras, the dynamic adjustment technology of parameters such as light splitting ratio, light intensity transmittance, lens aperture, and camera exposure time and the high dynamic synthesis technology of multi-source images are used to achieve extreme light intensity in the scene. Clear imaging with a large dynamic range under changing conditions fundamentally solves the problem of dynamic adjustment of exposure required for high dynamic range imaging, and it is of great significance to achieve high-quality imaging in photometry. Ba...

AI Technical Summary

Problems solved by technology

However, the domestic Changchun Institute of Optics and Mechanics, Zhejiang University, Nankai University, Guizhou University, National University of Defense Technology, Tsinghua University and other units, as well as some optoelectronic research institutes and companies, have made great efforts in camera response curve generation, camera internal and external parameter calibration, image alignment and matching. Accurate, image stitching, optical lens design and manufacture, optical electromechanical structure design, image sensor application control design and other aspects have made good progress, formed the technical strength of sub-modules, and made breakthroughs in the application research of some new devices, For example, the combination of DMD and CCD used by Changchun Optical Machinery Institute to realize pixel-level exposure control can achieve an imaging dynamic range of 96dB, but there is still a lot of gap with the dynamic range of more than 120dB (or even more than 150dB) required by high dynamic imaging.

Moreover, the current domestic high dynamic range imaging still lacks large-scale system-level design and application capabilities

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