A motion detection structure and motion detection method applied to cis

Abstract

The motion detection structure provided by the present invention includes a signal gain adjustment module, a signal comparison module, a feedback gain adjustment module and a vector signal integration module; the first input port of the signal gain adjustment module is input with a reference signal, and the second input port of the signal gain adjustment module connected to the output port of the feedback gain adjustment module; the second input port of the signal comparison module inputs the signal to be compared, the first input port of the signal comparison module is connected to the output port of the signal gain adjustment module; the input port of the feedback gain adjustment module is connected to the signal comparison module The output port of the module; the input port of the vector signal integration module is connected to the output port of the signal comparison module, and the output port of the vector signal integration module outputs a vector signal, so that the motion detection structure does not need a digital-to-analog converter for digital-to-analog conversion, which simplifies the structure and saves money. The conversion time of the digital-to-analog converter increases the maximum achievable frame rate of the CIS.

Description

technical field [0001] The invention relates to the field of CMOS integrated circuit design, and more particularly, to a motion detection structure and a motion detection method applied to CIS. Background technique [0002] With the development of CMOS integrated circuit technology, electronic products are more and more widely used in daily life and become an indispensable part of various fields. CMOS image sensors (CIS) are widely used in daily life and processes due to their advantages of high integration, low power consumption, and low cost. Using image sensors to detect moving objects is beneficial to security monitoring, home monitoring and other monitoring fields to play a huge role. [0003] For the detection of moving objects, the CIS can be used to compare the original data of the two frames of images, and to determine whether the object is in a moving state by detecting whether there is a difference between the two frames of image data. Since this kind of moving ...

AI Technical Summary

Problems solved by technology

Since the readout time of the circuit is limited by the conversion time of the analog-to-digital converter, the achievable maximum frame rate of the image sensor is reduced, which greatly limits the speed of moving object detection

[0004] In the existing motion detection, motion detection is also judged based on vector information, but the existing vector information is realized through the ISP (image signal processor, image signal processor) outside the CMOS image sensor, through the algorithm in the ISP Doing vector information acquisition consumes a lot of dynamic power

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