Endoscope photometric apparatus
First Claim
1. An endoscope photometric apparatus comprising:
- an endoscope imaging apparatus;
a photometric means, connected to said endoscope imaging apparatus, for detecting brightness of an image based on an input image signal from said endoscope imaging apparatus;
an extracting means, connected to said endoscope imaging apparatus, for extracting, from the input image signal from said endoscope imaging apparatus, a bright part of the image signal in which a difference in brightness level at a periphery of the image is above a predetermined value and a spatial size of said bright part is below a predetermined value; and
a limiting means, connected to said endoscope imaging apparatus, said extracting means and said photometric means, for limiting input into said photometric means of a part, corresponding to said bright part, in said image signal by using an output of said extracting means in order to reduce the influence of said bright part on the brightness of the entire image.
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Abstract
An endoscope photometric apparatus includes a photometric apparatus for detecting the brightness of an image based on an image signal from an endoscope imaging apparatus. An extracting apparatus extracts, from the image signal from the imaging apparatus, a bright part in which the brightness level from the peripheral of the image is above a predetermined value and the spatial size of the bright part is below a predetermined value. A limiting device limits the input image signal into the photometric apparatus of the part, corresponding to the bright part, in the image signal by using the output of the extracting apparatus in order to reduce the influence of the bright part on the brightness of the entire image.
64 Citations
15 Claims
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1. An endoscope photometric apparatus comprising:
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an endoscope imaging apparatus; a photometric means, connected to said endoscope imaging apparatus, for detecting brightness of an image based on an input image signal from said endoscope imaging apparatus; an extracting means, connected to said endoscope imaging apparatus, for extracting, from the input image signal from said endoscope imaging apparatus, a bright part of the image signal in which a difference in brightness level at a periphery of the image is above a predetermined value and a spatial size of said bright part is below a predetermined value; and a limiting means, connected to said endoscope imaging apparatus, said extracting means and said photometric means, for limiting input into said photometric means of a part, corresponding to said bright part, in said image signal by using an output of said extracting means in order to reduce the influence of said bright part on the brightness of the entire image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An endoscope apparatus comprising:
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an endoscope body having an elongate insertable part including an observing window at a tip and an image forming optical system for forming an endoscope image by receiving light, from an object, incident through said observing window; an imaging means for imaging said endoscope image formed by said imaging forming optical system as an image signal; a photometric means for detecting brightness of said endoscope image based on the image signal from said imaging means; a brightness controlling means for controlling the brightness of said endoscope image based on an output of said photometric means; an extracting means for extracting, from the image signal from said imaging means, a bright part in which a difference in brightness level at a periphery of the endoscope image is above a predetermined value and a spatial size of said bright part is below a predetermined value; and a limiting means for limiting a part of the image signal input into said photometric means corresponding to said bright part, by using an output of said extracting means in order to reduce the influence of said bright part on the brightness of the entire image. - View Dependent Claims (12, 13, 14, 15)
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Specification