Motion detection structure and motion detection method applied to CIS

Abstract

A motion detection structure provided by the invention comprises a signal gain adjustment module, a signal comparison module, a feedback gain adjustment module and a vector signal integration module.A reference signal is input into a first input port of the signal gain adjustment module, and a second input port of the signal gain adjustment module is connected with an output port of the feedbackgain adjustment module. A signal to be compared is input into a second input port of the signal comparison module, and a first input port of the signal comparison module is connected with an output port of the signal gain adjustment module. An input port of the feedback gain adjustment module is connected with an output port of the signal comparison module. An input port of the vector signal integration module is connected with the output port of the signal comparison module, and an output port of the vector signal integration module outputs a vector signal. The motion detection structure doesnot need a digital-to-analog converter to carry out digital-to-analog conversion, the structure is simplified, the conversion time of the digital-to-analog converter is saved, and the achievable maximum frame rate of the CIS is improved.

Description

technical field [0001] The invention relates to the field of CMOS integrated circuit design, and more specifically, relates 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 sensor (CIS) is widely used in daily life and technology due to its advantages of high integration, low power consumption and low cost. The use of 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, CIS can be used to compare the original data of two frames of images, and by detecting whether there is a difference between the two frames of image data, it can be determined whether the object is in motion. Since this kind of movin...

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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