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Can someone help me with a court case?

I am currently involved in a court case, where the main evidence exhibit, is a photograph. The photo was taken at a distance of approximately 6 feet and the camera flash was used. What I need to know [from photography experts] is whether or not the light from the flash would prevent dark holes from being visible in a material that is white in colour? I know that you can get glare from a reflective surface, but would the flash effect things with regard to the circumstance that I have just mentioned.

Most likely not. The entire photo is reflected light captured by the film or the image sensor. If a photo is overexposed, lighter parts 'blow out' beyond the existing dynamic range but you can still see whatever is in the shadow. Underexposed, it goes the other way, but you can still see the lighter parts. Perfectly exposed and you can see everything. A flash is just another light source, so assuming there is at least something being exposed, the flash would have no impact on hiding dark areas (the holes) from appearing in the white material. As for glare, what you are describing there is 'flare' where light bounces around inside the lens and comes in at two different angles causing what is in effect a sliver of overexposure. This might possibly hide the holes, but you are more likely to get flare in sunny conditions than from a flash.

Of course there are many other elements at work. If the holes are very small, the resolution might not be high enough to pick them up. There is also the fact that photos can be easily manipulated and while I am not a lawyer, it would seem that attacking the authenticity of a photo would be part of any strategy from whomever is trying to disprove what the photo shows. How does anyone know that the photo has not been altered. There have been several highly publicized cases (at least in photographic circles) of journalists being fired for subtle manipulation to photos that imply circumstances other than the truth (most recently a journalist who used photoshop to make the smoke from a battle appear worse than it really was). See here:

http://www.zombietime.com/reuters_photo_fraud/

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