Real-time endoscopic image processing system

Details Real-time endoscopic image processing system Real-time endoscopic image processing system

1992-02-05

1993-08-24

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358168, 358174, H04N 521, A61B 104

Patent

active

052393755

ABSTRACT:
A real-time endoscopic image processing system for removing a net pattern from an image has an image processing section (1000) which includes a first controlling circuit (400) for receiving a video signal (S2) from one of a video signal S1 output from a television camera (14) and a VTR, or the like. A horizontal sample-hold circuit (500) generates a horizontal peak sample-hold signal (S5) by continuously sampling and holding the peak value of a sinusoidal video signal voltage from the video signal output (S2) which corresponds to the bright and dark portions of an image. A second controlling circuit (600) delays the horizontal peak sample-hold signal (S5) and compares a delay signal (S5D) with the horizontal peak sample-hold signal (S5) to detect the peak value of the original voltage which varies in a sinusoidal form with respect to the vertical scanning direction, and outputting a vertical peak sampling controlling signal (S6). A vertical sample-hold circuit (700) receives the vertical peak sampling controlling signal (S6) and the delay signal (S 5D) and outputs a continuous vertical peak sample-hold signal (S7) according to the vertical peak sampling controlling signal (S6). The vertical peak sample-hold signal (S7) output from the image processing section (1000) is displayed on a monitor.

REFERENCES:
patent: 4905668 (1990-03-01), Ohsawa
patent: 4977450 (1990-12-01), Yokota

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