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US 11,596,290 B2Granted
Image pickup system, endoscope system, and image pickup gain setting method
AssigneeOlympus Corporation
InventorSaeri Saito
Life of this patent
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Abstract
An image pickup system includes an image pickup device including an image pickup section, a first amplifier circuit capable of amplifying a video signal for each field, and a communication circuit configured to acquire a set gain of the first amplifier circuit, a second amplifier circuit configured to amplify the video signal outputted from the image pickup device, and a processor. According to a result of a detection indicating that the video signal is not amplified by the set gain in the first amplifier circuit, a correction gain to be set in the second amplifier circuit is calculated.
Claims12
An image pickup system comprising:
- an image pickup device comprising:
- an image sensor configured to pick up an image of an object and output a video signal;
- a first amplifier circuit configured to amplify and output the video signal of at least one of a plurality of fields;
- and
- a communication circuit configured to acquire, through communication with an outside of the image pickup system, a set gain to be set as a gain of the first amplifier circuit;
- an image-pickup control circuit configured to transmit, through communication with the communication circuit, the set gain of at least one of the plurality of fields to the image pickup device;
- a second amplifier circuit configured to amplify the video signal outputted from the image pickup device;
- and
- a processor,
- wherein the image-pickup control circuit or the processor is configured to detect whether the video signal is amplified by the set gain in the first amplifier circuit, and
- wherein the image-pickup control circuit or the processor is configured to calculate, according to a result of the detection indicating that the video signal is not amplified by the set gain in the first amplifier circuit, a correction gain set in the second amplifier circuit.
8 more elements
An endoscope system comprising:
- an endoscope;
- a light source apparatus configured to irradiate illumination light on an object, the illumination light having two or more kinds of light, each with a different wavelength band and assigned to a respective field of a plurality of fields;
- an image pickup device comprising:
- an image sensor provided in the endoscope and configured to pick up an image of the object and output a video signal;
- a first amplifier circuit configured to amplify and output the video signal of at least one of the plurality of fields;
- and
- a communication circuit configured to acquire, through communication with an outside of the endoscope, a set gain to be set as a gain of the first amplifier circuit;
- a video processor configured to perform image processing on the video signal outputted from the endoscope;
- an image-pickup control circuit configured to transmit, through communication with the communication circuit, the set gain of at least one of the plurality of fields to the image pickup device;
- a second amplifier circuit configured to amplify the video signal outputted from the image pickup device;
- and
- a processor,
- wherein the image-pickup control circuit or the processor is configured to detect whether the video signal is amplified by the set gain in the first amplifier circuit, and
- wherein the image-pickup control circuit or the processor is configured to calculate, according to a result of the detection indicating that the video signal is not amplified by the set gain in the first amplifier circuit, a correction gain set in the second amplifier circuit.
11 more elements
An image-pickup gain setting method for an image pickup system,
- wherein the image pickup system comprises:
- an image pickup device comprising:
- an image sensor configured to pick up an image of an object and output a video signal;
- a first amplifier circuit configured to amplify and output the video signal of at least one of a plurality of fields;
- and
- a communication circuit configured to acquire, through communication with an outside of the image pickup system, a set gain to be set as a gain of the first amplifier circuit;
- an image-pickup control circuit configured to transmit, through communication with the communication circuit, the set gain of at least one of the plurality of fields to the image pickup device;
- and
- a second amplifier circuit configured to amplify the video signal outputted from the image pickup device, and
- wherein the image-pickup gain setting method comprises:
- setting, in the first amplifier circuit, the set gain of at least one of the plurality of fields transmitted from the image-pickup control circuit to the communication circuit;
- acquiring an actual gain of the first amplifier circuit based on the video signal outputted from the image pickup device;
- comparing the set gain and the actual gain to thereby detect whether the video signal is amplified by the set gain in the first amplifier circuit;
- calculating, when a result of the detection indicating that the video signal is not amplified by the set gain in the first amplifier circuit is obtained by the set gain and the actual gain not coinciding with each other, a correction gain based on a difference between the actual gain and the set gain;
- and
- setting the correction gain in the second amplifier circuit.
13 more elements
Dependencies are inferred from the claim text.