Engelhardt K, Seitz P
Appl Opt. 1993 Jun 1;32(16):3015-23. doi: 10.1364/AO.32.003015.
A procedure for the definition of optimum spectral transmission curves for any solid-state (especially silicon-based CCD) color camera is presented. The design of the target curves is based on computer simulation of the camera system and on the use of test colors with known spectral reflectances. Color errors are measured in a uniform color space (CIELUV) and by application of the Commission Internationale de l'Eclairage color difference formula. Dielectric filter stacks were designed by simulated thermal annealing, and a stripe filter pattern was fabricated with transmission properties close to the specifications. Optimization of the color transformation minimizes the residual average color error and an average color error of ~1 just noticeable difference should be feasible. This means that color differences on a side-to-side comparison of original and reproduced color are practically imperceptible. In addition, electrical cross talk within the solid-state imager can be compensated by adapting the color matrixing coefficients. The theoretical findings of this work were employed for the design and fabrication of a high-resolution digital CCD color camera with high calorimetric accuracy.
提出了一种为任何固态（特别是基于硅的电荷耦合器件）彩色相机定义最佳光谱传输曲线的程序。目标曲线的设计基于相机系统的计算机模拟以及使用具有已知光谱反射率的测试颜色。颜色误差在均匀颜色空间（CIELUV）中测量，并通过应用国际照明委员会色差公式进行测量。通过模拟热退火设计介电滤光片堆栈，并制造出具有接近规格的传输特性的条纹滤光片图案。颜色变换的优化可将残留平均颜色误差降至最低，并且平均颜色误差约为1个刚可察觉差异应该是可行的。这意味着在原始颜色和再现颜色的左右比较中，颜色差异实际上是不可察觉的。此外，可以通过调整颜色矩阵系数来补偿固态成像器内的电串扰。这项工作的理论成果被用于设计和制造具有高量热精度的高分辨率数字电荷耦合器件彩色相机。
