Colorimetric Scanner Characterisation
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| Title | Colorimetric Scanner Characterisation |
| Authors | |
| Abstract | In this paper, methods for the colorimetric characterisation of colour scanners are proposed and evaluated. These methods apply equally to other colour image input devices such as digital cameras. The goal of our characterisation is to establish the relationship between the device-dependent colour space of the scanner and the device-independent CIELAB colour space. The scanner characterisation is based on polynomial regression techniques. Several regression schemes have been tested. The retained method consists in applying a non-linear correction to the scanner RGB values followed by a 3rd order 3D polynomial regression function directly to CIELAB space. This method gives very good results in terms of residual colour differences. This is partly due to the fact that the RMS error that is minimised in the regression corresponds to ΔE*ab which is well correlated to visual colour differences. |
| Publisher | Acta Graphica |
| Date | 2003-12-10 |
| Source | Acta Graphica Vol 15, No 3-4 (2003) |
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