Cone and rod multiplexing bionic vision sensor

Abstract

An embodiment of the present invention provides a cone-rod multiplexing bionic vision sensor, including: a preset number of voltage mode active pixel sensor circuits and a preset number of current mode active pixel sensor circuits, a voltage mode active pixel sensor circuit The pixel sensor circuit and a current mode active pixel sensor circuit share a photosensitive device. Through the voltage mode active pixel sensor, the target voltage signal representing the light intensity information in the target light signal can be output, and the obtained target voltage signal can represent the light intensity information with higher accuracy, and a higher quality image can be obtained, that is, the image has a higher High image signal-to-noise ratio. At the same time, through the current mode active pixel sensor, the specified digital signal that represents the light intensity gradient information in the target light signal can be output. On the one hand, the specified digital signal can be quickly obtained, making the image faster; on the other hand, due to Designating a digital signal to represent light intensity gradient information can improve the dynamic range of the image.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, and more specifically, to a cone-rod multiplexed bionic vision sensor. Background technique [0002] With the continuous deepening of research on image sensors and image processing and recognition algorithms, bionic vision sensors play an increasingly important role in many application fields such as industrial manufacturing, intelligent transportation, and intelligent robots. [0003] The bionic vision sensor mainly simulates the mode of the human retina. The human retina mainly includes two kinds of visual perception cells, namely cone cells and rod cells, which correspond to two different modes. Among them, the mode of cone cells is mainly sensitive to absolute light intensity information and color information, and has high image restoration accuracy, but the restoration speed is slow; contrary to the mode of cone cells, rod cells are mainly sensitive to light Perceive the change ...

AI Technical Summary

Problems solved by technology

It can be seen from the above that under the framework of the traditional bionic vision sensor, these three indicators are often mutually exclusive: for example, when the shooting speed increases, the dynamic range of the bionic vision sensor will decrease; when the image quality improves, the shooting speed will generally decrease. reduced, it is difficult to take care of both

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