Signal processing apparatus for endoscope capable of changing outline enhancement frequency
First Claim
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1. A signal processor for processing signals obtained from an electronic endoscope having an image pickup device, said signal processor, comprising:
- video signal processing means operably connected to said image pickup device for processing an output signal from said image pickup device so as to obtain desired video signals;
outline enhancing means operably connected to said image pickup device including said video signal processing means for changing a frequency range and for processing an output signal from said image pickup device to thereby effect outline enhancement; and
means operably connected to said outline enhancing means for selecting and setting said frequency range relating to the operation of said outline enhancing means.
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Abstract
A signal processor for processing signals obtained from an electronic endoscope having an image pickup device which performs photoelectric conversion, the processor having an outline enhancing circuit capable of enhancing outlines within one of a plurality of enhancement frequency ranges, and a circuit capable of selecting one these enhancement frequency ranges. Frequencies that define the range of outline enhancement are thereby varied depending upon the type of the object.
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Citations
18 Claims
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1. A signal processor for processing signals obtained from an electronic endoscope having an image pickup device, said signal processor, comprising:
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video signal processing means operably connected to said image pickup device for processing an output signal from said image pickup device so as to obtain desired video signals; outline enhancing means operably connected to said image pickup device including said video signal processing means for changing a frequency range and for processing an output signal from said image pickup device to thereby effect outline enhancement; and means operably connected to said outline enhancing means for selecting and setting said frequency range relating to the operation of said outline enhancing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic endoscope apparatus, comprising:
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an electronic endoscope having an elongated insertion portion, an illuminating optical means for emitting illuminating light from a head portion of said insertion portion, an imaging objective disposed in the head portion of said insertion portion, and an image pickup device for effecting photoelectric conversion of an image formed by said objective; a drive circuit means operably connected to said image pickup device for outputting a drive signal to be read by said image pickup device; signal processing means operably connected to said image pickup device for processing a signal output from said image pickup device in response to said drive signal so as to generate a predetermined image signal; monitor means operably connected to said signal processing means for displaying an object image on the basis of said predetermined image signal output from said signal processing means; light source means for supplying said illuminating optical means with illumination light; outline enhancing means including said signal processing means for effecting outline enhancement of the object image displayed on said monitor means in one of a plurality of enhancement frequency ranges; and change-over means for changing said plurality of enhancement frequency ranges. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification