Digital color imaging colposcopy: a matter of choice.
OBJECTIVE
To describe the technical performance of a digital color imaging colposcopy (DCIC) system.


METHODS
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.
Hopman
E H
EH
Department of Obstetrics and Gynecology, Free University Hospital, Amsterdam, The Netherlands.
Rozendaal
L
L
Verheijen
R H
RH
Kenemans
P
P
Helmerhorst
T J
TJ
D003127:Colposcopy / Q000379:methods*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D012680:Sensitivity and Specificity; D014741:Video Recording