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US 5,631,695 AGranted
Endoscope with smear extraction and correction
AssigneeOlympus Optical Co., Ltd.
InventorsKazunari Nakamura, Keiichi Hiyama
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Abstract
An image processing apparatus for an endoscope including a smearing component extraction device for extracting a smearing component caused by a high luminance light beam from an original image composed of an image signal of a subject to be imaged. The image processing apparatus also includes a device for correcting the original image composed of the image signal by use of the signal of the smearing component extracted by the smearing component extraction device and reduces or eliminates smearing when a laser treatment is carried out to thereby improve the quality of an image to be observed.
Claims31
An image processing apparatus for an endoscope, comprising:
- smearing component extraction means for extracting a smearing component caused by a high luminance light beam from an original image composed of an image signal of a subject to be imaged, wherein said smearing component extraction means takes predetermined correlations with respect to luminance information in respective directions in which smearing occurs in the original image composed of said image signal, removes components having a small correlation value in said directions, and then extracts a smearing component of an image signal output from an imaging means which receives a light beam from a subject and subjects the light beam to photo-electric conversion or a smearing component of an image signal output from image record/reproduction means for recording an output from said imaging means;
- and
- correction means for correcting said original image composed of said image signal by use of the signal of said smearing component extracted by said smearing component extraction means.
An image processing apparatus for an endoscope, comprising:
- smearing component extraction means for extracting a smearing component caused by a high luminance light beam from an original image composed of an electric signal output from imaging means for receiving a light beam and subjecting said received light beam to photoelectric conversion, wherein said smearing component extraction means determines average values of luminance information in respective transfer directions and extracts a portion where said average values are equal to or greater than a predetermined value as a smearing component;
- and
- correction means for correcting said electric signal output from said imaging means by use of the signal of said smearing component extracted by said smearing component extraction means.
An image processing apparatus for an endoscope comprising:
- smearing component extraction means for extracting a smearing component caused by a specific high luminance light beam from an original image composed of an electric signal output from imaging means for receiving a light beam and subjecting said received light beam to photo-electric conversion, wherein said smearing component extraction means determines average values of luminance information in respective transfer directions and extracts a portion where said average values are equal to or greater than a predetermined value as a smearing component;
- and
- correction means for correcting said electric signal output from said imaging means by use of said smearing component extracted by said smearing component extraction means.
An image processing apparatus for an endoscope comprising:
- smearing component extraction means for extracting a smearing component caused by a specific high luminance light beam from an original image composed of an electric signal output from imaging means for receiving a light beam and subjecting said received light beam to photo-electric conversion, wherein said smearing component extraction means determines average values of luminance information in respective transfer directions and extracts a portion where said average values are equal to or greater than a predetermined value as a smearing component;
- correction means for correcting said electric signal output from said imaging means by use of said smearing component extracted by said smearing component extraction means;
- and
- control means for controlling whether or not said correction means carries out a correcting operation according to at least one of the condition whether or not said specific high luminance light beam is irradiated and the condition whether or not there is a position where smearing is caused by said specific high luminance light beam in an image composed of an electric signal output from said imaging means.
1 more element
An image processing apparatus for an endoscope, comprising:
- smearing component extraction means for extracting a smearing component caused by a high luminance light beam from an original image composed of an image signal of a subject to be imaged, wherein said smearing component extraction means takes predetermined correlations with respect to luminance information in respective directions in which smearing occurs in the original image composed of said image signal, said smearing component extraction means removing components having a small correlation value in said directions and a luminance value equal to or greater than a predetermined value, said smearing component extraction means then detecting a smearing component by extracting a portion where a high correlation value is exhibited, thereby producing said smearing component of an image signal output from imaging means which receives a light beam from a subject and subjects the light beam to photo-electric conversion or a smearing component of an image signal output from image record/reproduction means for recording an output from said imaging means;
- and
- correction means for correcting said original image composed of said image signal by use of the signal of said smearing component extracted by said smearing component extraction means.
Dependencies are inferred from the claim text.