Colour error reduction in video systems

The problems of achieving color fidelity in video systems are reviewed. Usually a correction matrix is appropriate for one illumination environment, but not necessarily others. A wide range of situations is examined, and, by use of 16 test colors, a matrix can be derived which gives good colorimetry for each. However, as the signal/noise ratio may be degraded, a matrix may be derived which gives a good compromise between noise performance and accurate color rendition. Some color environments are similar, so that ultimately only eight correction matrices are necessary. The noise performance, in terms of the display signal/noise ratio, is determined, and it is shown to be modified by about 1.5 dB for most situations. It is expected that this concept will lead to fully compensating color video cameras