Methods of measurement for colour reproduction of digital cameras

The authors have newly developed measuring methods to assess and characterize colour reproduction of digital still cameras and digital video cameras used in computer systems and similar applications. For ob jective assessment of the performance of digital cameras which capture colour images and output corresponding colour information in red - green - blue digital image data, the proposed new methods incorporate spectral responsivity characteristics measurement and other characteristics measurements. They are made possible by using newly developed test charts with a dark box and a spectral light source. The proposed set up for the measurements is specially effective to eliminate the influence of automatic functions commonly equipped in digital cameras for low-end consumer use. In this paper, arrangement of measurement equipment, definition of test charts, and raw data handling are described together with worked examples.