Colour calibration method for an image capture device

A non-transitory computer readable media including software for use with a computer including a processor and memory for storing the software, the software including a series of instructions executable by the processor to carry out a method for providing a mapping from apparent colour to actual colour for an image capture device, the method including:

• capturing an image of a reference colour chart having a plurality of colour patches using the image capture device, wherein each colour patch has an associated reference colour,
• measuring the apparent colour of the plurality of colour patches in the captured image,
• selecting a plurality of control points representing different hue values within a circular hue space,
• determining an angular offset for each control point such that the distance between a transformed apparent colour and the reference colour for each colour patch is minimised, the angular offset representing a hue correction,
• wherein interpolation of the angular offsets for the control points provides a mapping from apparent colour to actual colour for the image capture device.

Apparatus including

• a processor;
• a memory;
• and
• software resident in the memory accessible to the processor, the software including a series of instructions executable by the processor to carry out a method for providing a mapping from apparent colour to actual colour for an image capture device, the method including:
• capturing an image of a reference colour chart having a plurality of colour patches using the image capture device, wherein each colour patch has an associated reference colour,
• measuring the apparent colour of the plurality of colour patches in the captured image,
• selecting a plurality of control points representing different hue values within a circular hue space,
• determining an angular offset for each control point such that the distance between a transformed apparent colour and the reference colour for each colour patch is minimised, the angular offset representing a hue correction,
• wherein interpolation of the angular offsets for the control points provides a mapping from apparent colour to actual colour for the image capture device.