Abstract
The author investigated the use of cross-polarisation for day-to-day practice after a request from a clinician to remove specular highlights from intra-oral photographs. The paper evaluates camera and light source devices for image capture using cross-polarisation. Following this it defines ways to calibrate the camera to the correct white balance. It then develops by carrying out a series of tests to define the point of influence in regard to signal-to-noise ratio. These tests showed that the anti-aliasing filters of some cameras are more prominent than others and therefore can have a significant affect. In conclusion, when the appropriate equipment is employed, cross-polarisation is a viable and practical technique that has application within the medical, scientific, and forensic fields.
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