Method and circuit for reducing the influence of a bright image area in an endoscope image signal
First Claim
Patent Images
1. A method of reducing influence of a bright part of an image in an endoscope image signal comprising respective steps of:
- extracting, from said endoscope image singal, a signal component of said bright part of said image in which a difference in brightness level at a periphery of said image is above a predetermined value and a spatial size of said bright part is below a predetermined value; and
depressing said bright part of said image in said endoscope image signal or a signal based on said endoscope image signal by using said signal component of said bright part of said image.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and circuit reduces the influence of a bright image area in an endoscope image signal. From the endoscope image signal, a signal component of the bright image area of a level difference from the periphery above a predetermined value and a spatial size below a predetermined value are extracted. The part, corresponding to the bright image area in the image signal or a signal based on the image signal, is depressed using the signal component of the bright image area.
-
Citations
33 Claims
-
1. A method of reducing influence of a bright part of an image in an endoscope image signal comprising respective steps of:
-
extracting, from said endoscope image singal, a signal component of said bright part of said image in which a difference in brightness level at a periphery of said image is above a predetermined value and a spatial size of said bright part is below a predetermined value; and depressing said bright part of said image in said endoscope image signal or a signal based on said endoscope image signal by using said signal component of said bright part of said image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A circuit for reducing influence of a bright area in an endoscope image signal comprising:
-
an extracting means for extracting, from an endoscope image signal, a signal component of a bright area in which a difference in brightness level at a periphery of said bright area is above a predetermined value and a spatial size of said bright area is below a predetermined value; and a depressing means for depressing said bright area in said endoscope image signal or a signal based on said endoscope image signal by using said signal component of said bright area extracted by said extracting means. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. An endoscope apparatus comprising:
-
an endoscope body having an elongate insertable part including an observing window at a tip and an image forming optical system receiving light coming from an object to be imaged and incident through said observing window and forming an endoscope image; an imaging means for imaging said endoscope image formed by said image forming optical system; an extracting means for extracting a signal component of a bright image area in which a difference in brightness level at a periphery of said bright image area is about a predetermined value and a spatial size of said bright image area is below a predetermined value from the endoscope image signal obtained by said imaging means; and a depressing means for depressing said bright image area in said endoscope image signal based on said endoscope image signal by using said signal component of said bright image area extracted by said extracting means. - View Dependent Claims (32, 33)
-
Specification