Three-channel CMOS synchronous polarization imaging system

Abstract

The invention discloses a three-channel CMOS synchronous polarization imaging system, which belongs to the technical field of photoelectric imaging detection. The system comprises a polarization optical system, a three-channel CMOS image acquisition module, a DSP image processor module and an image registration algorithm. The polarization optical system is composed of linear polarization films, electric three-variable lenses and a driving module thereof. The installation directions of linear polarization of three acquisition channels are respectively the 0-degree direction, the 45-degree direction and the 90-degree direction. The three-channel CMOS image acquisition module is composed of three CMOS image sensors, completes image acquisition under the maximum resolution and can be applicable to static image capture and continuous video acquisition. The DSP image processor module can simultaneously process a plurality of channels of digital video streams. The image registration algorithm includes feature point detection, feature point matching, transformation model estimation and image transformation and reacquisition. The three-channel CMOS synchronous polarization imaging system is capable of better detecting water surface tracer particles and provides an effective particle detection effect for large-scale particle image velocity measurement.

Description

technical field [0001] The invention relates to a synchronous polarization imaging system, in particular to a three-channel CMOS synchronous polarization imaging system, which belongs to the field of photoelectric imaging detection. Background technique [0002] With the development of polarization imaging theory, polarization imaging detection technology has become an important detection means of modern measurement technology. Compared with natural objects, the contours and surfaces of man-made objects have a significantly larger degree of polarization, and the use of polarization information can improve the contrast of man-made objects in images. According to the theory of polarization measurement, as long as the intensity of linearly polarized light at three different angles is measured, the polarization degree and polarization angle of the polarized light can be solved. Most of the current large-scale particle image velocimetry uses the traditional target detection syst...

AI Technical Summary

Problems solved by technology

However, in the actual water surface image acquisition process, when the visible light propagates in the atmosphere or water, it will be scattered and reflected by the particles in the medium, so that the image acquired by the traditional target detection system has image blur, low contrast, and serious information loss. and other problems, resulting in greater difficulty in target detection

At the same time, when the water surface image is acquired, due to the specular reflection on the water surface, the image area where the specular reflection occurs is highlighted. When the tracer particle detection is performed, the tracer particle cannot be detected effectively.

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