Black Sesame Technologies Inc.

Zhaowei Xin

Chao Wang

Donghui Wu

Hui Pan

The disclosure provides a system and method for calibrating extrinsic parameters of a camera mounted on a vehicle. While the vehicle is parked, the camera captures an image of a plurality of feature points with known world coordinates on a ground plane. The system determines pixel coordinates of the plurality of feature points in an image plane and estimates a homography matrix between the ground plane and the image plane based on a subset of the plurality of feature points. The system generates an initial estimate of the extrinsic parameters based on the estimated homography matrix and applies an optimization technique to obtain calibrated extrinsic parameters based on the initial estimate, the world coordinates, and the pixel coordinates of the plurality of feature points. Applying the optimization technique can include minimizing inverse-projection errors of the plurality of feature points from the image plane to the ground plane.

System and method for extrinsic parameter calibration and self-inspection of on-vehicle cameras

A polarization imaging system for generating a super resolution image is disclosed in the present invention. The polarization imaging system consists of multiple functional elements for the generation of the super resolution image including a camera device, a polarization analysis module, a weight module, a fusion module and an output module. The lens of the imaging system captures light coming from a subject which is detected and acted upon by a polarization sensor. The polarization sensor generates multiple low resolution images and calculates degree of linear polarization and angle of polarization of the light rays based on which a guided mask is generated. The system employs an algorithm to combine the one or more low resolution images to produce a final super resolution image as the output.

Polarization imaging system with super resolution fusion

A high dynamic range sensor, comprising a pixel array, having a plurality of pixels, a spatial light transmittance modulator, the spatial light transmittance modulator having a plurality of pre-defined shadings, the plurality of pre-defined shadings are fixed with respect to the plurality of pixels, wherein the plurality of pre-defined shadings is located above the plurality of pixels and a micro-lens array, having a plurality of micro-lens aligned to at least one of the plurality of pixels, wherein the micro-lens array is located above the plurality of pixels.

Extended dynamic range image capture device based on a coded spatial light transmittance modulator

A method to reduce a motion blur and a rolling shutter effect, comprising, receiving a main image frame, a main timing and a main exposure from a main camera, receiving a secondary image frame, a secondary timing and a secondary exposure from a secondary camera, correcting the secondary image frame to the main image frame, determining a delta timing based on the main timing and the secondary timing, determining a delta exposure based on the main exposure and the secondary exposure, determining a discrete motion of offset sequences based on the secondary image frame, determining a row-wise motion blur kernel based on the main image frame and the discrete motion of offset sequences and determining a spatially varying kernel deconvolution based on the main image frame and the row-wise motion blur kernel.

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Xuchang, China

Zhaowei Xin