Mapping method of event camera not influenced by speed

• Main Authors: ZHOU LIFENG, WANG BISHAN, CHEN XINYU, YU LEI, YE QILIN, YANG GONGYU, YANG WEN
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention provides a mapping method of an event camera not influenced by speed. The problem that a traditional image algorithm cannot be applied to an event camera due to the fact that data generated by the event camera are asynchronous event streams rather than traditional image frame streams is solved. The method comprises steps of generating an image frame stream with constant brightness and high contrast from an event stream by a method of keeping the difference between the values of the pixel points on the contour and the values of the surrounding pixel points in the image constant; updating the speed-invariant image once every event arrives, setting the brightness of the event position on the image as a maximum constant value, reducing the brightness values of surrounding field points, keeping the edge contrast constant, and removing the trailing effect by using a high-pass filter. The image generated by the method is clear in edge and constant in brightness contrast, and subsequent image processing