Accurate spectral response measurement system for digital color cameras

Gao Wei Chang*, Zong Mu Yeh

*此作品的通信作者

研究成果: 書貢獻/報告類型會議論文篇章

摘要

In imaging systems, color plays an essential role in conveying and recording visual information from the real world. To faithfully represent colors acquired from digital cameras, a spectral responsivity measurement system is proposed for those devices in this paper. For estimating spectral responsivities of digital color cameras, a filter-based optical system is designed with proper filter selections. Since the spectral filters primarily prescribe the optical characteristics of the system, the filter consideration is important to the optical design of the system with the presence of noise. A theoretica basis is presented to confirm that sophisticated filter selections can make this system as insensitive to noise as possible Also, we propose a filter selection method based on the orthogonal-triangular (QR) decomposition with column pivoting (QRCP). To investigate the noise effects, we assess the estimation errors between the actual and estimated spectra responsivities, with the different signal-to-noise ratio (SNR) levels of an eight-bit/channel camera. To demonstrate the effectiveness of this approach, the experimental results from the filter-based optical system with the spectral filters selected from the QRCP-based method is much less sensitive to noise than those with other filters from differenent selections. It is found that the measurement accuracy is fairly satisfactory.

原文英語
主出版物標題Proceedings of SPIE-IS and T Electronic Imaging - Color Imaging XII
主出版物子標題Processing, Hardcopy, and Applications
出版狀態已發佈 - 2007 五月 25
事件Color Imaging XII: Processing, Hardcopy, and Applications - San Jose, CA, 美国
持續時間: 2007 一月 302007 二月 1

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
6493
ISSN(列印)0277-786X

其他

其他Color Imaging XII: Processing, Hardcopy, and Applications
國家/地區美国
城市San Jose, CA
期間2007/01/302007/02/01

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程

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