An image processing apparatus and method, recording medium, and program

PROBLEM TO BE SOLVED: To correct shading without enlarging a circuit scale or a program scale even if one of the zoom position of an imaging lens, the focus position, the image height, the amount of aperture, the projection pupil position, and the amount of storobe light emission, lies between both ends. SOLUTION: For each pixel read from an imaging device 2, a horizontal counter value and a vertical counter value, corresponding to the pixel are supplied from a signal generator 11 to a distance computation section 23 via an optical-axis-center coordinate setting section 21 and a vertical and horizontal distance weighting section 22. In the distance computation section, the distance to an optical-axis-center position is computed, and the correction coefficients for a zoom wide end and for a zoom tele end, which correspond to the distance, are obtained by look-up tables 24, 25. The two obtained correction coefficients are blended at a mixture ratio, which is determined by a blend ratio setting section 26, by a gain blend processing section 27. The blended shading correction coefficients are gain adjusted by a gain adjustment section 28, after which they are supplied to a correction section 29. As a result, a correction corresponding to the distance to the optical-axis-center position is performed on the signal of each pixel to be supplied from an imaging section 3. The present invention is applied to a digital still camera. COPYRIGHT: (C)2005,JPO&NCIPI