Determining the colours on a bedika cloth is a wisdom that has been passed on from generation to generation. Preferably a bedika cloth is checked by the light of the sun ('white light'). I've have been to some Rabbanim who rely on an electrical white light source as well as direct sunlight, to check a bedika cloth.
Would it therefore be possible (under the correct photography conditions) to standardise photography settings such that one can take a 'white-light-equivalent' photograph to be sent to a Rav via digital media such as email, SMS, Whatsapp, etc.
To probe further... if the conditions are agreed upon, can a computer program be used to determine whether a bedika cloth is tahor or tamei?