Paper Info
Title
The Analysis and Suppressing of Non-Uniformity in a High-Speed Spike-Based Image Sensor.
Abstract
In this paper, the non-ideal factors, which include spatial noise and temporal noise, are analyzed and suppressed in the high-speed spike-based image sensor, which combines the high-speed scanning sequential format with the method that uses the interspike time interval to indicate the scene information. In this imager, spatial noise contains device mismatch, which results in photo response non-uniformity (PRNU) and the non-uniformity of dark current. By multiplying the measured coefficient matrix the photo response non-uniformity is suppressed, and the non-uniformity of dark current is suppressed by correcting the interspike time interval based on the time interval of dark current. The temporal noise is composed of the shot noise and thermal noise. This kind of noise can be eliminated when using the spike frequency to restore the image. The experimental results show that, based on the spike frequency method, the standard deviation of the image decreases from 18.4792 to 0.5683 in the uniform bright light by using the calibration algorithm. While in the relatively uniform dark condition, the standard deviation decreases from 1.5812 to 0.4516. Based on interspike time interval method, because of time mismatch and temporal noise, the standard deviation of the image changes from 27.4252 to 27.4977 in the uniform bright light by using the calibration algorithm. While in the uniform dark condition, the standard deviation decreases from 2.361 to 0.3678.
Year
DOI
Venue
2018
10.3390/s18124232
SENSORS
Keywords
Field
DocType
interspike time interval,high-speed scanning sequential format,non-uniformity,coefficient matrix,calibration algorithm
Image sensor,Electronic engineering,Engineering
Journal
Volume
Issue
ISSN
18
12.0
1424-8220
Citations 
PageRank 
References 
2
0.46
0
Authors
5
Name
Order
Citations
PageRank
Jing Gao1244.95
Yanzhao Wang220.46
Kaiming Nie3358.77
Zhiyuan Gao4179.39
Jiangtao Xu53112.56