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Proceedings Paper

Measurement for opto-electronic conversion functions (OECFs) of digital still-picture camera
Author(s): Hou-Ping Wu; Ping Li; Yu Wang; Ying-Wei He; Cheng Li
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Paper Abstract

The opto-electronic conversion function (OECF) is defined as relationship between input luminance and digital output levels for an opto-electronic digital image capture system. It is a fundamental parameter to evaluate the performance of digital still-picture camera. An experiment device was set up to measure OECFs by using test charts with twelve neutral patches stepped in different visual density increments and a integrating sphere uniform illuminator. To determine the camera OECFs, images of the test charts were captured under controlled conditions for computer to calculate. For each trial, the mean digital output level shall be determined from a 64 by 64 pixel area located at the same relative position in each image. Several digital still-picture cameras were selected as test samples and their OECFs were different under a larger range of illumination. Besides, the dynamic range, incremental gain and SNR also have been calculated using the OECF test charts images data.

Paper Details

Date Published: 10 November 2010
PDF: 7 pages
Proc. SPIE 7850, Optoelectronic Imaging and Multimedia Technology, 78501D (10 November 2010); doi: 10.1117/12.869364
Show Author Affiliations
Hou-Ping Wu, National Institute of Metrology (China)
Ping Li, National Institute of Metrology (China)
Yu Wang, National Institute of Metrology (China)
Ying-Wei He, Beijing Institute of Technology (China)
Cheng Li, National Institute of Metrology (China)


Published in SPIE Proceedings Vol. 7850:
Optoelectronic Imaging and Multimedia Technology
Toru Yoshizawa; Ping Wei; Jesse Zheng; Tsutomu Shimura, Editor(s)

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