METHOD AND SYSTEM TO DETECT COLOUR FROM IMAGE Russian patent published in 2015 - IPC H04N1/60 G01J3/46 

FIELD: measurement equipment.

SUBSTANCE: invention relates to the method to detect colour of colour sample from an image, for instance, when selecting dye colour. A colour sample capture card is proposed with printed colour samples of known colour (for instance, XYZ-coordinates of colour), the image of the test colour sample is captured using domestic equipment with a digital camera. The image is then sent to the remote service of colour detection to detect colour of the colour sample, and regression analysis is used, which uses samples of RGB-colour in the image and its available XYZ-colours for characterisation of response of colour capture of the colour capture device with account of changes of spatial brightness by the image. On the basis of characterisation of the image capture device the XYZ-colour of unknown colour sample may be determined from its RGB-colour in the image.

EFFECT: provision of accurate identification of colour of an unknown colour sample and reliable calibration under conditions of varied illumination.

13 cl, 21 dwg