Abstract
Toshiba-Machida developed an electronic endoscope (TV Endoscope) in 1985, which was incorporated a CCD (charge coupled device) in its tip and had a highly resolving power (about 100, 000 picture elements). We can, therefore, observe and record the mucosal surface structure such as gastric pits which cannot be observed by using the standard type of fiberscope. In order to record more clearly such minute surface structure and make it possible to process easily their images by the computor, we added an aperture controller to TV-Endoscope system, which could control the frequency characteristic of NTSC color picture signals. Then we could get more easily and cheaper the similar edge enhancement of the TV-Endoscopic pictures with the hardware than with the software.
