FIELD: information technology.
SUBSTANCE: result is achieved by obtaining an image having a plurality of colours, obtaining a shift value of light flux of a second colour relative to light flux of a first colour, the shift value being determined by optical characteristics of a lens through which the light flux is transmitted to an image capturing unit, interpolating the signal level of the second colour in aberration coordinates from the signal level of pixels, having a second colour, around aberration coordinates, extracting the high-frequency signal level of the first colour of a target pixel in accordance with the degree of reduction of the high-frequency signal level in the signal level of the second colour in aberration coordinates, outputting, as the signal level of a pixel of second colour in the target pixel, a signal level obtained by adding the signal level extracted at the high-frequency extraction step to the signal level of the pixel of second colour, calculated at the shift correction step.
EFFECT: correcting chromatic aberration of a lens with restoration of high-frequency components lost due correction of colour position shift, for which position shift correction is performed.
9 cl, 11 dwg
