Usefulness of cathode ray tube color displays in chromaticity-discrimination experiments

Chromatic-discrimination thresholds have been determined by use of a CRT co lor monitor that simulates aperture and object observation modes. The resul ts were compared with earlier ones [Appl. Opt. 35, 176 (1996)] that were ob tained under the same experimental observation conditions with different de vices. The differences found between the results obtained with the CRT moni tor and with visual colorimeters are of the order of magnitude of interobse rver variability (9%). However, greater differences were found between resu lts for CRT monitors and for illuminated samples, which could be attributed to suboptimal distribution of the samples in color space. The current resu lts support the usefulness of CRT color monitors in new chromatic-discrimin ation experiments. (C) 2000 Optical Society of America OCIS codes: 330.1720 , 330.1730, 330.1710, 120.2040, 330.6180.