Electronic endoscope system
First Claim
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1. An electronic endoscope system for detecting an image of an object using an imaging device, comprising:
- a light source that emits light to illuminate said object;
an image capturing element that receives an optical image of said object illuminated by said light source and outputs color image signals of said object;
an analog-to-digital converter that converts said color image signals into color image digital signals;
a plurality of memories that store said color image digital signals, corresponding to said color image signals, outputted by said analog-to-digital converter;
a video processing circuit that generates a video signal based on said color image digital signals stored in said plurality of memories;
a brightness data generating circuit that generates brightness data based on said color image digital signals stored in said plurality of memories;
a histogram circuit that applies histogram processing to said brightness data, generated by said brightness data generating circuit, to output histogram data; and
a controller that controls an amount of light emitted by said light source in accordance with a result of said histogram processing by said histogram circuit.
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Abstract
In an electronic endoscope system for detecting an image of an object using a CCD, a brightness signal is generated based on the output of the CCD, and a histogram processing is applied to the brightness signal. An aperture size for regulating the amount of light emitted to an object to be viewed is controlled in accordance with the calculation based on the histogram data.
143 Citations
22 Claims
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1. An electronic endoscope system for detecting an image of an object using an imaging device, comprising:
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a light source that emits light to illuminate said object; an image capturing element that receives an optical image of said object illuminated by said light source and outputs color image signals of said object; an analog-to-digital converter that converts said color image signals into color image digital signals; a plurality of memories that store said color image digital signals, corresponding to said color image signals, outputted by said analog-to-digital converter; a video processing circuit that generates a video signal based on said color image digital signals stored in said plurality of memories; a brightness data generating circuit that generates brightness data based on said color image digital signals stored in said plurality of memories; a histogram circuit that applies histogram processing to said brightness data, generated by said brightness data generating circuit, to output histogram data; and a controller that controls an amount of light emitted by said light source in accordance with a result of said histogram processing by said histogram circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 21)
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14. An electronic endoscope system for detecting an image of an object using an imaging device, comprising:
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means for emitting light to illuminate said object; means for capturing an optical image of said object illuminated by said emitting means, said capturing means outputting color image signals of said object; means for converting said color image signals into color image digital signals; means for storing said color image digital signals, corresponding to said color image signals, outputted by said converting means; means for producing a video signal based on said color image digital signals stored in said storing means; means for generating brightness data based on said color image digital signals stored in said storing means; means for histogram processing said brightness data, generated by said brightness generating means, to output histogram data; and means for controlling an amount of light emitted by said emitting means in accordance with a result of said histogram processing by said histogram processing means. - View Dependent Claims (15, 16, 17, 18, 22)
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19. An electronic endoscope system for detecting an image of an object using an imaging device, comprising:
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a light source that emits light to illuminate said object; an image capturing device that receives an optical image of said object illuminated by said light source and outputs color image signals of said object; a converter that converts said color image signals into color image digital signals; a memory that stores said color image digital signals, corresponding to said color image signals, outputted by said converter; a processor that generates a video signal, corresponding to an image, that is outputted to a display unit, said video signal being based on said color image digital signals stored in said memory; a brightness data generating circuit that generates brightness data based on said color image digital signals stored in said memory; a histogram circuit that applies histogram processing to said brightness data, generated by said brightness data generating circuit, to output histogram data; a controller that controls an amount of light emitted by said light source in accordance with a result of said histogram processing by said histogram circuit; and an enlargement processing device that enlarges said image outputted to said display unit, a part of said image being displayed on said display unit when an enlargement processing is applied by said enlargement processing device, said histogram circuit applying said histogram processing to only a part of said brightness data corresponding to said part of said image displayed on said display unit. - View Dependent Claims (20)
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Specification