A signal processing device includes: a processor including at least one or more pieces of hardware, the processor being configured to: switch to one of a first state in which an input of a clock signal for operating an imager to the imager is permitted and a second state in which the input of the clock signal to the imager is prohibited, and temporarily switch from the first state to the second state when a first synchronization signal output from a first synchronization signal generation circuit and a second synchronization signal output from a second synchronization signal generation circuit are not synchronized.

An endoscope system includes an endoscope, a control apparatus to which the endoscope is connected, at least one accessory device used in combination with the endoscope and the control apparatus, and data tags respectively provided in the endoscope and the accessory device. The control apparatus reads first data of the respective data tags, compares second data respectively registered about the endoscope and the accessory device and the first data, and performs warning when the first data and the second data do not coincide.

An endoscope includes: an image sensor in which a color filters having two or more colors is disposed at an imaging position and has a predetermined array pattern; and a correction processing unit configured to repeatedly perform processing of changing a target pixel value at a target imaging position to a median value between a neighboring pixel value and the target pixel value, while changing the target imaging position, when a pixel value at a neighboring imaging position near the target imaging position including at least two most neighboring imaging positions on a row closest to the target imaging position with the target imaging position interposed therebetween at an imaging position of a color filter, which is on a row along one direction identical to the target imaging position in image data output from the image sensor, and has a same color as a color filter at the target imaging position, is set as a neighboring pixel value.

An endoscope includes: an image sensor in which a color filters having two or more colors is disposed at an imaging position and has a predetermined array pattern; and a correction processing unit configured to repeatedly perform processing of changing a target pixel value at a target imaging position to a median value between a neighboring pixel value and the target pixel value, while changing the target imaging position, when a pixel value at a neighboring imaging position near the target imaging position including at least two most neighboring imaging positions on a row closest to the target imaging position with the target imaging position interposed therebetween at an imaging position of a color filter, which is on a row along one direction identical to the target imaging position in image data output from the image sensor, and has a same color as a color filter at the target imaging position, is set as a neighboring pixel value.

A medical image processing device acquires an endoscopic image obtained by imaging a subject with an endoscope, detects a gravity direction in the endoscopic image on the basis of the endoscopic image, generates a gravity direction indication indicating the gravity direction, and displays the gravity direction indication on a display. An endoscope system includes the medical image processing device and the endoscope.

A medical image processing device acquires an endoscopic image obtained by imaging a subject with an endoscope, detects a gravity direction in the endoscopic image on the basis of the endoscopic image, generates a gravity direction indication indicating the gravity direction, and displays the gravity direction indication on a display. An endoscope system includes the medical image processing device and the endoscope.

Provided are a measurement support device, an endoscope system, a processor for an endoscope system, and a measurement support method capable of easily and highly accurately measuring the size of a subject. In the measurement support device related to one aspect of the invention, the position of a spot by measurement auxiliary light is measured, and information indicating the actual size of a subject is acquired on the basis of the measurement result to create and display a marker. Moreover, an optical axis of the measurement auxiliary light has an inclination angle that is not 0 degrees with respect to an optical axis of the imaging optical system in a case where the optical axis of the measurement auxiliary light is projected on a plane including the optical axis of the imaging optical system.

Provided are a measurement support device, an endoscope system, a processor for an endoscope system, and a measurement support method capable of easily and highly accurately measuring the size of a subject. In the measurement support device related to one aspect of the invention, the position of a spot by measurement auxiliary light is measured, and information indicating the actual size of a subject is acquired on the basis of the measurement result to create and display a marker. Moreover, an optical axis of the measurement auxiliary light has an inclination angle that is not 0 degrees with respect to an optical axis of the imaging optical system in a case where the optical axis of the measurement auxiliary light is projected on a plane including the optical axis of the imaging optical system.

A medical observation system includes: a plurality of types of sensor units that measure information regarding an internal environment; an acquisition unit (131) that acquires individual sensor values of the plurality of types of sensor units; a comparison unit (132) that compares the individual sensor values of the plurality of types of sensor units acquired by the acquisition unit (131); and a determination unit (134) that determines a sensor unit to be used for observing the internal environment among the plurality of types of sensor units based on a comparison result obtained by the comparison unit (132).

A medical observation system includes: a plurality of types of sensor units that measure information regarding an internal environment; an acquisition unit (131) that acquires individual sensor values of the plurality of types of sensor units; a comparison unit (132) that compares the individual sensor values of the plurality of types of sensor units acquired by the acquisition unit (131); and a determination unit (134) that determines a sensor unit to be used for observing the internal environment among the plurality of types of sensor units based on a comparison result obtained by the comparison unit (132).