1. A system for processing image data comprising: a processor, the processor comprising an input which receives image data corresponding to a first scene, wherein the processor processes the image data using at least first and second processing algorithms to produce first and second processed signals for use in identifying characteristics of the first scene, wherein the processor receives a condition associated with the first scene when the image data was captured, and wherein the processor automatically selects among the first and second processed signals as a function of the condition to produce a selected output; and an output for outputting the selected output, the selected output identifying characteristics of the first scene.