A Simple and Cost Effective Colorimeter for Characterising Observer Variability in Colour Matching Experiments

In colour science, matching functions (CMFs) are essential for measuring how sensitive the human eye is to various light wavelengths and determining of stimuli in viewing situations. It has traditionally taken a lot time effort conduct colour-matching studies describe an observer’s perception colour. This article presents simple compact 3D-printed colorimeter designed experiments. A pilot study was conducted using with four observers participating maximum saturation-type experiment., where they would match spectral lights 400-720 nm range three narrow band LED primaries. The aimed assess accuracy performance system individual observer CMFs. Results showed that CMFs normal characteristics colour-normal observer. However, limited number measurements per may have contributed lack smoothness one were compared Stiles Burch 1955 RGB CMFs, after normalising same We noted red green fell within expected range, while blue function some unusual characteristics. limitations overall also discussed. conclusion, promising results however need be addressed improve accuracy. Additionally, further required better characterise intra-observer inter-observer variabilities.