1. An image capturing apparatus for capturing image data representing a scene, said apparatus comprising: first control parameter determining means for determining a first white balance parameter based on user input; second control parameter determining means for determining a second white balance parameter based on an external condition detected by said apparatus; determining means for determining a difference between a first white balance parameter based on the user input and a second white balance parameter based on the external condition; and modifying means for modifying a process of said image capturing apparatus in accordance with the determined difference.