Image processing device, storage medium, display apparatus and image processing method

An image processing device for a display device, comprising a color gamut converter, a first gamma corrector and a denormalizer, a second gamma corrector, a normalizer,

• wherein the color gamut converter is configured to perform processing on an input signal inputted into the display device to allow a display operation according to a color gamut range of the display device to be converted into a display operation according to a color gamut range of the input signal when the display device displays the input signal, so that the color gamut range of the display device is consistent with the color gamut range of the input signal;
• the color gamut converter is further configured to receive display signal data obtained from the input signal and output transformed signal data by normalization and second gamma correction;
• the first gamma corrector is configured to obtain transformed signal normalized data by first gamma correction, which is inverse correction of second gamma correction, on the transformed signal data;
• the denormalizer is configured to obtain transformed signal gamma data by denormalization, which is inverse transformation of the normalization, of the transformed signal normalized data, and transmit the transformed signal gamma data to the display device for display;
• the second gamma corrector is configured to obtain the display signal data by the second gamma correction on display signal normalized data obtained from the input signal by the normalization;
• a gamma value of the second gamma correction and a gamma value of the first gamma correction are mutually reciprocal;
• and
• the normalizer is configured to obtain the display signal normalized data by the normalization on display signal gamma data as the input signal inputted into the image processing device;
• wherein the color gamut converter is configured to adopt a color gamut conversion matrix to realize color gamut conversion, and the color gamut conversion matrix is as follows:
• [M]=[AS]·[KS]·[KP]−1·[AP]−1
• in which [M] refers to the color gamut conversion matrix;
• [AS] refers to a transformation matrix for converting tristimulus values of the transformed signal data into corresponding chromaticity coordinate values;
• [KS] refers to a coefficient matrix for normalizing the tristimulus values of the transformed signal data;
• [AP] refers to a transformation matrix for converting tristimulus values of the display signal data into corresponding chromaticity coordinate values;
• and [KP] refers to a coefficient matrix for normalizing the tristimulus values of the display signal data.