1. A method comprising: digitally processing a first image of a scene from a first perspective, to identify a first obscured portion of the scene at an imaging plane that is obscured by a forward object in the scene; digitally processing a second image of the scene from a second perspective, to identify a second obscured portion of the scene at the imaging plane that is obscured by the forward object in the scene; determining if the first obscured portion of the scene and the second obscured portion of the scene are overlapping at the imaging plane; and wherein if it is determined that the first obscured portion of the scene and the second obscured portion of the scene are overlapping at the imaging plane, not enabling the first image and second image to be processed to produce a third composite image of the scene, and outputting an indication that the first image and the second image cannot be processed to produce a third composite image of the scene without the forward object.