Unlock instant, AI-driven research and patent intelligence for your innovation.

A detector-based optical flow acquisition method for pulsed image sensors

An image sensor and acquisition method technology, applied in image analysis, image communication, image data processing, etc., can solve the problems of wasting time and computing resources

Active Publication Date: 2022-05-31
TIANJIN UNIV MARINE TECH RES INST
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These redundant data need to be deleted during the capture process, thus wasting time and computing resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A detector-based optical flow acquisition method for pulsed image sensors
  • A detector-based optical flow acquisition method for pulsed image sensors
  • A detector-based optical flow acquisition method for pulsed image sensors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The technical solutions of the present invention will be further clearly and completely described below with reference to the accompanying drawings in the present invention.

[0020] An optical flow acquisition method based on a detector-based pulsed image sensor, such as figure 1 As shown, it consists of two mirror-symmetrical subunits. In each subunit, two adjacent intervals are used to measure the light intensity. One interval is delayed by a low-pass filter, which can be regarded as two intervals at different times. relationship, the output is the differential signal of the two subunit multipliers.

[0021] f(x,y,t) is the light intensity at position (x,y) at time t, Δx , Δy is the compensation amount of the adjacent unit, Δt is the delay, the output of the Reichardt detector is:

[0022]

[0023] in x’ = x + Δx , y’ = y + Δy , t = t + Δt ; if | RD(f, x, y, t, t’) |Threshold exceeded T RD , indicating that the detection direction is alon...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An optical flow acquisition method based on a detector-based pulsed image sensor, which consists of two mirror-symmetrical subunits. In each subunit, two adjacent intervals are used to measure the light intensity, and one interval is passed through a low-pass filter. Delay can be seen as the relationship between two intervals at different times, and the output is the differential signal of the two subunit multipliers; when calculating, the data format must first be unified, and each event needs to record time t, position (x, y) and polarity are positive (+) or negative (‑), set and adjust the threshold T according to the effect; this method processes the pulse sensor signal into the form of DVS sparse data, and can be used to judge the movement of objects similar to the Reichardt detector principle Direction, and then get the optical flow; less computing resources are occupied, the power consumption is lower, and the time consumption is shorter, which can realize the real-time calculation of optical flow.

Description

technical field [0001] The invention belongs to the field of image processing algorithms, and in particular relates to an optical flow algorithm used for motion detection of a pulsed image sensor, that is, a detector-based optical flow acquisition method of a pulsed image sensor. Background technique [0002] Motion detection is a common task in the fields of video processing and computer vision, and optical flow computation is one way to achieve motion detection. In applications such as self-driving cars and robotic navigation, detection algorithms must be done in real-time and because the devices themselves have limitations on power consumption and computing power. [0003] Optical flow is used to represent the motion patterns that occur in the scene, and it is usually represented as a vector field at each time step, with each pixel labeled with a vector representing the direction and velocity of motion. Existing optical flow calculation methods are obtained from traditio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225G06T7/269
CPCG06T7/269H04N23/54
Inventor 徐江涛张培文高静聂凯明杨喆
Owner TIANJIN UNIV MARINE TECH RES INST