Pixel acquisition circuit and optical flow sensor

Abstract

The invention discloses a pixel acquisition circuit, which at least includes: a light intensity detector, a first state storage module, a second state storage module, a light intensity signal acquisition and storage module, and a time information storage module. The invention also discloses an optical flow sensor including the pixel acquisition circuit.

Description

technical field [0001] The invention relates to the technical field of image acquisition, in particular to a pixel acquisition circuit and an optical flow sensor. Background technique [0002] With the continuous development of information technology, computer vision and image information processing become more and more important. Among them, the optical flow method can determine the movement of the target object based on image information. It can be applied in many fields such as military aerospace, traffic supervision, information science, meteorology and medicine. [0003] The concept of optical flow was first proposed by Gibson in 1950. Objects can be imaged by photosensitive elements. The points in the image are in one-to-one correspondence with the points on the real object. When the target object moves in the three-dimensional scene, the image brightness pattern in the corresponding image frame sequence will show flow. This flow of image brightness patterns can b...

AI Technical Summary

Problems solved by technology

Traditional optical flow calculations are mostly based on frame calculations. When the background in the field of view is static or changes very little, frame calculations will generate a large amount of redundant data information. The horizontal gradient value, vertical gradient value and light intensity are obtained during optical flow calculation. When the value is changed, all pixel information will be processed, which adds a large number of parallel operations to image processing and reduces the speed of target object motion analysis

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