Abstract
Effective colour rendering can be said to occur when the colour appearances of differently coloured objects are significantly different from each other and occupy a large volume in colour space. A measure called the colour rendering capacity (CRC) is introduced to assess whether a given light source assists effective colour rendering. By calculating the CRC, a range of computer-simulated spectral power distributions are examined and two spectral band positions leading to exceptionally high CRC are identified. The gamut area index (GAI) is also calculated. A very significant correlation between GAI and CRC is observed, suggesting that the GAI could be equally useful in assessing the effectiveness of colour rendering.
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