OBJECTIVE: To describe the technical performance of a digital color imaging colposcopy (DCIC) system. STUDY DESIGN: A videocamera has been selected on the basis of physical size and technical performance. Four digitizer boards with different analogue input signals and different digitizing properties, have been tested with a video test image. The technical performance of a DCIC-system has been analyzed. RESULTS: A 3-CCD color videocamera gives the best analogue registration. Signal transfer by RGB-videosignal gives superior color and spatial resolution when compared to Y/C in composite videotransfer. Digitalization of the analogue videoimage with less than 24-bit resolution digitizer boards resulted in unwanted side effects that were related to the color measurement accuracy. CONCLUSIONS: Digital imaging colposcopy requires a 3-CCD videocamera of which the videosignal is transferred as an RGB-signal to a digitizerboard with 24-bit resolution that provides 16 million different colors. To store the image a large medium that is easily accessible is needed.
OBJECTIVE: To describe the technical performance of a digital color imaging colposcopy (DCIC) system. STUDY DESIGN: A videocamera has been selected on the basis of physical size and technical performance. Four digitizer boards with different analogue input signals and different digitizing properties, have been tested with a video test image. The technical performance of a DCIC-system has been analyzed. RESULTS: A 3-CCD color videocamera gives the best analogue registration. Signal transfer by RGB-videosignal gives superior color and spatial resolution when compared to Y/C in composite videotransfer. Digitalization of the analogue videoimage with less than 24-bit resolution digitizer boards resulted in unwanted side effects that were related to the color measurement accuracy. CONCLUSIONS: Digital imaging colposcopy requires a 3-CCD videocamera of which the videosignal is transferred as an RGB-signal to a digitizerboard with 24-bit resolution that provides 16 million different colors. To store the image a large medium that is easily accessible is needed.
Authors: Christopher T Lam; Marlee S Krieger; Jennifer E Gallagher; Betsy Asma; Lisa C Muasher; John W Schmitt; Nimmi Ramanujam Journal: PLoS One Date: 2015-09-02 Impact factor: 3.240