Olympus Corporation

Yoichiro Sakanoue

Satoshi Tanaka

Yusuke Yabe

Noriko Kohira

An endoscope system includes: a light source including one or more semiconductor light sources; an image pickup apparatus configured to pick up an image of the object irradiated with the illumination light to obtain the image; and a processor. The processor is configured to detect brightness of the image, to change one of a current value and an application period of a current applied to the semiconductor light source when the brightness of the image belongs to a first brightness range, to change the brightness of the image by predetermined processing, to which the image is subjected, when the brightness of the image belongs to a second brightness range, and to change the other of the current value and the application period of the current applied to the semiconductor light source when the brightness of the image belongs to a third brightness range.

Endoscope system, processor for endoscope, method of controlling endoscope system, and recording medium

An endoscope apparatus includes a light emitting element, an image pickup device of a rolling shutter scheme, and a control section. The control section performs control for switching between a first illumination mode for irradiating light on a subject in a readout period in which readout of an electric signal is performed in order for each of lines in the image pickup device and a second illumination mode for not irradiating light on the subject in the readout period. The control section controls the image pickup device to perform electronic shutter processing in all-line exposure period in which exposure of a plurality of lines is simultaneously performed in a frame corresponding to timing when one of the first illumination mode and the second illumination mode is switched to the other illumination mode.

Endoscope apparatus and video processor

An endoscope apparatus includes: a light-emitting element; a rolling shutter-type image pickup device allowing an exposure period in which the plurality of lines are simultaneously exposed and a reading period in which image pickup signals of the respective lines are sequentially read to be alternately switched to each other; and a control section. The control section controls an intensity of the light emitted by the light-emitting element. The control section can perform switching between a first illumination mode in which the light is applied from the light-emitting element in the exposure period and the reading period and a second illumination mode in which the light is applied from the light-emitting element only in the exposure period, and if the intensity of the light is controlled so as to have a predetermined value, performs control to switch one of the first mode and the second mode to the other.

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Hachioji, Japan

Yoichiro Sakanoue