Patent ID: 8306412

Claim:
A handheld electronic device comprising: a flash, the flash including a light source comprising a source of electromagnetic energy and an absorption/emission layer, the absorption/emission layer overlying the source of electromagnetic energy and having a thickness (T) in an on-axis direction away from the source of electromagnetic energy; a processor; a camera apparatus configured to provide input to the processor, the camera including a sensor comprising a plurality of R pixels, a plurality of G pixels, and a plurality of B pixels distributed about the sensor, the processor configured to execute instructions, stored on a processor-readable medium, to implement a lens shading method, the method comprising: processing an image signal in accordance with camera compensation parameters; determining whether the image signal is a flash image signal; in response to determining the image signal is a flash image signal, further processing the image signal with flash compensation parameters, the flash compensation parameters comprising an R compensation parameter subset, a G compensation parameter subset, and a B compensation parameter subset; receiving as a portion of the flash image signal at least one R pixel signal, at least one G pixel signal, and at least one B pixel signal; individually processing the R, G and B pixel signals with the R, G, and B compensation parameter subsets, respectively; and employing as the flash compensation parameters in the R, G, and B compensation parameter subsets compensation parameters that have been selected to compensate for spectral variations resulting from off-axis transmission of electromagnetic energy a greater distance through the absorption/emission layer than the thickness (T).