OPTIMAL NONNEGATIVE COLOR SCANNING FILTERS

In this correspondence, the problem of designing color scanning filter s for multi-illuminant color recording is considered. The filter trans mittances are determined from a minimum-mean-squared orthogonal tristi mulus error criterion that minimizes the color error in estimates obta ined from noisy recorded data. Nonnegativity constraints essential for physical realizability are imposed on the filter transmittances. In o rder to demonstrate the significant improvements obtained, the resulti ng filters are compared with suboptimal filters reported in earlier li terature.