Measurement for opto-electronic conversion functions (OECFs) of digital still-picture camera

Hou-Ping Wu; Ping Li; Yu Wang; Ying-Wei He; Cheng Li

doi:10.1117/12.869364

9 November 2010 Measurement for opto-electronic conversion functions (OECFs) of digital still-picture camera

Hou-Ping Wu, Ping Li, Yu Wang, Ying-Wei He, Cheng Li

Proceedings Volume 7850, Optoelectronic Imaging and Multimedia Technology; 78501D (2010) https://doi.org/10.1117/12.869364
Event: Photonics Asia 2010, 2010, Beijing, China

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.

Citation Download Citation

Hou-Ping Wu, Ping Li, Yu Wang, Ying-Wei He, and Cheng Li "Measurement for opto-electronic conversion functions (OECFs) of digital still-picture camera", Proc. SPIE 7850, Optoelectronic Imaging and Multimedia Technology, 78501D (9 November 2010); https://doi.org/10.1117/12.869364

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