Image processing apparatus, control method thereof, and image-capturing apparatus

摘要

Disclosed are an image processing apparatus which effectively corrects, by a simple method, color crosstalk that is generated in a captured image by light obliquely entering an image sensor, and a control method thereof. A white-detection area used in white balance processing for a captured image signal is set in accordance with an aperture value used in image capturing. The degree of color crosstalk depends on an aperture value used in image capturing, and the spectral sensitivity characteristic of the image sensor changes depending on the degree of color crosstalk. By setting a white-detection range to correct a change of the spectral sensitivity characteristic depending on the aperture value, color crosstalk can be simply, effectively corrected.

主权项

1. An image processing apparatus which processes an image signal obtained using an image sensor including a color filter, the apparatus having a hardware processor, comprising:
an obtaining unit configured to obtain an aperture value used in image capturing; a setting unit configured to set a white-detection area used in white balance processing for the image signal; and a correction unit configured to apply white balance processing to the image signal using the white-detection area set by said setting unit, wherein said setting unit sets a white-detection area based on the aperture value obtained by said obtaining unit to correct a change of a spectral sensitivity characteristic of the image sensor that is caused by color crosstalk of the image signal depending on an aperture value, and wherein said setting unit sets the white-detection area in the magenta direction to be narrower as the aperture value becomes smaller.