Constant Precision Indirect Time of Flight Range Images Using Variable Frame Rate Imaging

This paper expands on variable frame rate imaging, a technique for improving the dynamic range of indirect time of flight range imaging cameras. Variable frame rate imaging varies the effective integration time across the scene being measured. A theoretical model describing the technique is develope...

Full description

Saved in:
Bibliographic Details
Published in:IEEE sensors journal 2014-08, Vol.14 (8), p.2813-2823
Main Authors: Drayton, Benjamin M. M., Carnegie, Dale A., Dorrington, Adrian A.
Format: Article
Language:English
Subjects:
Cameras
Digital imaging
Dynamic range
Phase measurement
Product introduction
Sensors
Time measurement
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper expands on variable frame rate imaging, a technique for improving the dynamic range of indirect time of flight range imaging cameras. Variable frame rate imaging varies the effective integration time across the scene being measured. A theoretical model describing the technique is developed and experimentally verified. Variable frame rate imaging is extended by the introduction of a new quality metric, allowing the system to capture an approximately constant precision range image regardless of the properties of the scene being measured. In previous implementations of this technique, the darker areas of the scene suffer from significantly lower precision than bright areas. A comparison is provided between the new metric and the metric previously reported in the literature. Finally, the effect of variable frame rate imaging on known systematic errors in indirect time of flight systems is examined, namely measurement nonlinearity and motion error.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2014.2317577