The Hong Kong Polytechnic University (PolyU) collaborates with Transsion Holdings to translate the latest research results of colour characterisation into actual products, so as to improve the display quality and user experience of smartphones.
As smart products become indispensable in our daily life, the improvement of user experience on imaging systems largely depends on the colour calibration and management technologies. The research team led by Prof. WEI Minchen, Tommy, Director of Colour Imaging and Metaverse Research Centre at PolyU proposes to apply a 3D piecewise model to tackle the poor performance of conventional models.
Based on the measurements of the tristimulus values of 64 combinations of digital signal values, the 3D piecewise model divides the display gamma encoded colour space into 27 subspaces and characterizes the crosstalk effects. This high-quality solution allows a fast and automatic colour calibration of smartphone displays, resulting in an average color difference ΔE00 reduced from 3.96 to 0.72, which reaches the industry-leading level.
This solution has been implemented on the smartphone production line for automatic colour calibration, ensuring that users can enjoy accurate and faithful colour appearance under a wide range of viewing conditions.
