CMOS asynchronous time domain image sensor capable of achieving real-time time stamp

Inactive Publication Date: 2014-02-19
TIANJIN UNIV
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Problems solved by technology

[0006] The present invention aims to overcome the deficiencies of the prior art, solve the event-time mismatch problem brought about by the asynchronous output mode of AER, realize the accurate mark output of time between image lines, improve the accuracy of the obtained image in the time domain, and provid

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  • CMOS asynchronous time domain image sensor capable of achieving real-time time stamp
  • CMOS asynchronous time domain image sensor capable of achieving real-time time stamp
  • CMOS asynchronous time domain image sensor capable of achieving real-time time stamp

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[0022] The sensor of the present invention adopts a 128*128 pixel array, and the structure is as Figure 4 As shown, it consists of a row / column reset control circuit, a row arbitration circuit, a row time marking circuit, and a row / column address encoding circuit.

[0023] (1) Row / column reset control circuit. The column reset control circuit (x_reset control) controls the reset of each pixel CD circuit, and the control signal x_Rst column is shared. The row reset control circuit (y_reset control) controls the reset of the double sampling PWM circuit of each pixel, and the control signal y_Rst is shared by the row. The advantage of resetting the CD circuit and the double-sampling PWM circuit separately is that the double-sampling PWM circuit can be directly controlled when the global shooting mode or the snapshot mode is performed, and the CD circuit is in a standby state.

[0024] (2) Row arbitration circuit (y_arbiter). When the illumination changes, the output of the CD circu...

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Abstract

The invention relates to the integrated circuit design filed and the digital image processing field of microelectronics. A CMOS asynchronous time domain image sensor capable of achieving real-time time stamp aims to solve the event-time mismatching problem caused by an AER asynchronous output mode, achieve accurate stamp output of image time among rows, and improve the accuracy of obtained images in a time domain. In order to achieve the purposes, according to the technical scheme, the CMOS asynchronous time domain image sensor capable of achieving the real-time time stamp comprises a light intensity change detector circuit CD and a double-sampling pulse width modulation circuit PWM and further comprises a row/column reset control circuit, a row arbiter circuit, a row level time stamp circuit and a row/column address coding circuit, wherein the column address coding circuit receives row selected signals transmitted by a row weighted arbiter structure and outputs a selected row address, and the row address coding circuit is triggered by the output signals of the CD circuit outputting pixels. The CMOS asynchronous time domain image sensor capable of achieving the real-time time stamp is mainly applied to the design and the manufacturing of image sensors.

Description

technical field [0001] The invention relates to the field of integrated circuit design and digital image processing of microelectronics, and specifically relates to a CMOS asynchronous time-domain image sensor for realizing real-time time marking. Background technique [0002] Compared with the traditional "frame" image acquisition method, the asynchronous time-domain CMOS image sensor (CIS) imitates the working mechanism of biological vision, adopts asynchronous address-event representation (Address-Event Representation, AER), and only outputs the pixel address where the light intensity changes And information, instead of reading out the information of each pixel in the "frame" in turn. It has the characteristics of real-time dynamic response to scene changes, super-sparse representation of images, and asynchronous output of time-domain change events, which can solve the defects of high redundancy, high delay, high noise, low dynamic range, and transmission bottlenecks brou...

Claims

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Application Information

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IPC IPC(8): H04N5/345
Inventor 姚素英于璐徐江涛高静史再峰聂凯明
Owner TIANJIN UNIV
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