Bimodal bionic vision sensor with view cone and view rod

Abstract

The embodiment of the invention provides a bimodal bionic vision sensor with a view cone and a view rod. The sensor comprises a first preset number of voltage mode active pixel sensor circuits and a second preset number of current mode active pixel sensor circuits, wherein each voltage mode active pixel sensor circuit comprises a first type photosensitive device, and each current mode active pixelsensor circuit comprises a second type photosensitive device. Through the voltage mode active pixel sensor, the target voltage signal representing the light intensity information in the target lightsignal can be output, the precision of representing the light intensity information by the obtained target voltage signal is higher, and an image with higher quality can be obtained, that is, the image has a higher image signal-to-noise ratio. Through the current mode active pixel sensor, a specified digital signal representing light intensity gradient information in a target light signal can be output, the performance indexes such as an image dynamic range and a shooting speed of the bionic vision sensor are ensured, and the stability and robustness of the bionic vision sensor are stronger.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, and more specifically, to a cone-rod dual-mode 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 am...

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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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