Cross-polarisation, making it practical.
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.
Dental Illustration Unit, School of Dentistry, Cardiff University, Cardiff, UK. wmlnde@cardiff.ac.uk
Nathan
N
Edwards
D005454:Fluorescence Polarization / Q000295:instrumentation / Q000379:methods; D006801:Humans; D023861:Photography, Dental / Q000295:instrumentation* / Q000379:methods; D059629:Signal-To-Noise Ratio