COLOR CONVERSION

Colour conversion apparatus comprises mapping circuitry configured to map pixels of an input image having colour components in an input colour space to pixels of an mapped image having colour components in an output colour space, the input colour space and the output colour space being different colour spaces such that at least a subset of colours representable in the input colour space are not representable in the output colour space; processing circuitry configured to process the mapped image by detecting instances, in the colour components of pixels of the mapped image, of representations of negative amounts of a colour component and in response to such a detection in respect of a pixel under test, to increase all of the colour components of the pixel under test by an amount of at least the magnitude of the greatest magnitude negative amount of the colour components of that pixel under test; and output circuitry configured to generate pixels of an output image, having colour components in the output colour space, from pixels of the processed mapped image, the output circuitry being configured to inhibit colour components of pixels of the output image from exceeding a maximum representable colour amount.