Seeing a photograph of myself is often pretty jarring. Why...

Seeing a photograph of myself is often pretty jarring. Why is it that the vision I see of myself in a photo is so different than the one I see in a mirror - not to mention the "self" that I see in my mind's eye? Pondering it can pretty easily cast me into a vortex of self-doubt, wondering how the me that people experience - my voice, my personality, my creative expression - is regarded without my knowledge.