Geometric calibration of focused light field camera for 3-D flame temperature measurement

Jun Sun, Chuanlong Xu, Biao Zhang, Shimin Wang, Md Moinul Hossain, Hong Qi, Heping Tan

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

6 Citations (Scopus)
16 Downloads (Pure)

Abstract

Focused light field camera can be used to measure three-dimensional (3-D) temperature field of a flame because of its ability to record intensity and direction information of each ray from flame simultaneously. This work aims to develop a suitable geometric calibration method of focused light field camera for 3-D flame temperature measurement. A modified method based on Zhang's camera calibration is developed to calibrate the camera and the measurement system. A single focused light-field camera is used to capture images of bespoke calibration board for calibration in this study. Geometric parameters including intrinsic (i.e., camera parameters) and extrinsic (i.e., camera connecting with the calibration board) of the focused light field camera are calibrated to trace the ray projecting onto each pixel on CCD (charge-coupled device) sensor. Instead of using line features, corner point features are directly utilized for the calibration. The characteristics of focused light field camera including one 3-D point corresponding to several image points and matching main lens and microlens f-numbers, are used for calibration. Results with a focused light field camera are presented and discussed. Preliminary 3-D temperature distribution of a flame is also investigated and presented.

Original languageEnglish
Title of host publication2016 IEEE International Instrumentation and Measurement Technology Conference
Place of PublicationPiscataway, N.J.
Number of pages6
DOIs
Publication statusPublished - 22 Jul 2016
Event2016 IEEE International Instrumentation and Measurement Technology Conference - Taipei International Convention Center, Taipei, Taiwan, Province of China
Duration: 23 May 201626 May 2016
Conference number: 37481
http://imtc2016.ieee-ims.org/

Conference

Conference2016 IEEE International Instrumentation and Measurement Technology Conference
Abbreviated titleI2MTC 2016
CountryTaiwan, Province of China
CityTaipei
Period23/05/1626/05/16
Internet address

Keywords

  • camera calibration
  • focused light field camera
  • ray tracing
  • Zhang's calibration method
  • temperature mesurement
  • ccd image sensors

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    Sun, J., Xu, C., Zhang, B., Wang, S., Hossain, M. M., Qi, H., & Tan, H. (2016). Geometric calibration of focused light field camera for 3-D flame temperature measurement. In 2016 IEEE International Instrumentation and Measurement Technology Conference https://doi.org/10.1109/I2MTC.2016.7520580