GRADATION, COLOUR RANGE AND COLORIMETRIC ACCURACY OF DIGITAL PROJECTOR JVC DLA-RS 15

Abstract

Nowadays, digital projectors are used for displaying static and dynamic content, while operating with a wide range of different projection technologies. Presentation methods are also used to present important colour reproductions where the colours should be displayed accurately. The purpose of our research was to improve the colour quality of presentation and to define display of colour in digital projection. For that purpose high quality digital projector JVC DLA-RS15 was used. According to standard ISO 12646: 2010, was researched the display of colours in digital projection. For the colorimetric analysis of the displayed colours, the spectrophotometer i1Pro and the spectroradiometer PR-650 were used. Since the vast majority of digital photographs is captured and displayed in the standardized sRGB colour space, we investigated how well the sRGB colour space is displayed using JVC DLA-RS15 digital projector and whether the standard could be achieved by profiling its modules. Based on the results of our research, it was found out that spectroradiometer PR-650 always shows the same results regardless of the measuring distance. However, in case of the spectrophotometer i1Pro, it proved best to perform measurements and profiling so that the measuring distance equals to the projection distance. The monitoring and the evaluation of digital projections based on chromaticity, graduation, channel and grey balance and colour range according to the standard ISO 12646:2010 is quite demanding and timeconsuming. It has also been found that a large colour gamut of saturated primary colours at digital projector does not guarantee the quality of the displayed colours in the standard sRGB colour space.