Abstract: An endoscope apparatus includes a processor. The processor performs controlling a focus position of an objective optical system, acquiring images sequentially captured by an image sensor, and combining the images in N frames thus captured into a depth of field extended image in one frame. The processor controls the focus position such that focus positions at timings when the respective images in N frames are captured differ from each other. The processor combines the images in N frames that have been controlled to receive a constant quantity of light emission of illumination light or the images in N frames that have undergone a correction process to make image brightness constant, into the depth of field extended image.

Abstract: An imaging device includes a processor including hardware. The processor is configured to implement controlling a focus position of an objective optical system configured to form an image of a subject on an image sensor, acquiring L×N images per second captured by the image sensor, and combining acquired M images into one extended depth of field image to extend a depth of field, and outputting L extended depth of field images per second. The processor sets one of the M images as a reference image, performs positioning of the other image or images of the M images with respect to the reference image, and combines the thus positioned M images into the one extended depth of field image.

Abstract: A blur correction device includes a processor including hardware, and the processor obtains an object image from an imaging section, sets any one of a first region where a blur correction is not applied and a second region where the blur correction is applied, based on the object image, finds a third region representing a result of the blur correction applied to the second region, and combines the third region and the first region.

Abstract: An autofocus control device includes a processor. The processor performs an image acquisition process of acquiring an object image captured by an imaging section, a treatment determination process of determining whether or not treatment is being performed based on the object image, a focus evaluation area setting process of setting either a preset area or a treatment area set based on the object image, as a focus evaluation area in the object image based on a determination result of the treatment determination process, and a focus control process of performing focus control of the imaging section based on a focus evaluation value of the focus evaluation area.

Abstract: An imaging device includes a processor. The processor, in a manual focus mode, sets a focus evaluation area to have a larger size than the focus evaluation area set in an auto focus mode, generates assist information assisting adjustment of the in-focus object plane position based on a focus evaluation value obtained from an image of the focus evaluation area, and outputting the assist information to a display section.

Abstract: An endoscope apparatus includes an imaging device that acquires a plurality of images with different focus positions at different timings and a processor including hardware. The processor aligns the plurality of images with different focus positions, combines the plurality of images with different focus positions that have been aligned into a single depth of field increased image to increase a depth of field, obtains a risk index indicating a risk of occurrence of artifact in the depth of field increased image, and corrects the depth of field increased image on a basis of the risk index.

Abstract: An imaging device includes a processor including hardware. The processor is configured to implement controlling a focus position of an objective optical system configured to form an image of a subject on an image sensor, acquiring L×N images per second captured by the image sensor, and combining acquired M images into one extended depth of field image to extend a depth of field, and outputting L extended depth of field images per second. The processor sets one of the M images as a reference image, performs positioning of the other image or images of the M images with respect to the reference image, and combines the thus positioned M images into the one extended depth of field image.

Abstract: An endoscope apparatus comprises a processor comprising hardware. The processor is configured to implement a motion amount calculation process and a focus control process. The processor implements the motion amount calculation process that calculates a plurality of local motion amounts, calculates a correlation between each of the plurality of local motion amounts and a peripheral local motion amount, and calculates the relative motion amount based on a local motion amount among the plurality of local motion amounts that has the correlation higher than a given correlation. And the processor implements the focus control process that calculates a cumulative motion amount by accumulating the relative motion amount over N frames (wherein N is a natural number equal to or larger than 3), and causes the imaging section to perform a focus operation when it has been determined that the cumulative motion amount is larger than the first threshold value.

Abstract: An endoscope apparatus includes a processor comprising hardware. The processor implements a motion information acquisition process that acquires motion information representing a relative motion with respect to an imaging section and an object, a motion information determination process that determines motion information reliability indicating reliability of the motion information, and a focus control process that determines whether or not to perform a focus operation to cause the imaging section to bring the object into focus based on the motion information and the motion information reliability.

Abstract: An endoscope apparatus includes a processor. The processor performs controlling a focus position of an objective optical system, acquiring images sequentially captured by an image sensor, and combining the images in N frames thus captured into a depth of field extended image in one frame. The processor controls the focus position such that focus positions at timings when the respective images in N frames are captured differ from each other. The processor combines the images in N frames that have been controlled to receive a constant quantity of light emission of illumination light or the images in N frames that have undergone a correction process to make image brightness constant, into the depth of field extended image.

Abstract: An endoscope apparatus includes a processor. The processor acquires motion information representing a relative motion with respect to an imaging section and an object, and determines whether or not to perform a focus operation of causing an imaging section to bring an object into focus based on the motion information. The processor obtains global motion information representing a global relative motion with respect to the imaging section and the object based on the motion information, determines global motion information reliability that is reliability of the global motion information, and determines whether or not to perform the focus operation based on two or more frame images including a first frame image corresponding to a high reliability frame before a low reliability frame and a second frame image corresponding to the high reliability frame after the low reliability frame.

Abstract: A blur correction device includes a processor including hardware, and the processor obtains an object image from an imaging section, sets any one of a first region where a blur correction is not applied and a second region where the blur correction is applied, based on the object image, finds a third region representing a result of the blur correction applied to the second region, and combines the third region and the first region.

Abstract: An autofocus control device includes a processor. The processor performs an image acquisition process of acquiring an object image captured by an imaging section, a treatment determination process of determining whether or not treatment is being performed based on the object image, a focus evaluation area setting process of setting either a preset area or a treatment area set based on the object image, as a focus evaluation area in the object image based on a determination result of the treatment determination process, and a focus control process of performing focus control of the imaging section based on a focus evaluation value of the focus evaluation area.

Abstract: An endoscope device includes: a light source unit; an imaging device; a color filter in which a filter unit is arranged, the filter unit in which the number of filters which transmit light of a green wavelength band is equal to or larger than half the total number of filters and the number of filters which transmit light of a blue wavelength band is equal to or larger than the number of filters which transmit the light of the green wavelength band; and a noise reducing unit configured to select a pixel of interest based on used filter information determined according to the light emitted by the light source unit and a characteristic of each filter forming the color filter and detect motion between images captured at different times by using an electric signal output by the pixel of interest, thereby reducing a noise component included in the image signal.

Abstract: An endoscope apparatus includes a processor. The processor acquires motion information representing a relative motion with respect to an imaging section and an object, and determines whether or not to perform a focus operation of causing an imaging section to bring an object into focus based on the motion information. The processor obtains global motion information representing a global relative motion with respect to the imaging section and the object based on the motion information, determines global motion information reliability that is reliability of the global motion information, and determines whether or not to perform the focus operation based on two or more frame images including a first frame image corresponding to a high reliability frame before a low reliability frame and a second frame image corresponding to the high reliability frame after the low reliability frame.

Abstract: An imaging device includes a processor. The processor, in a manual focus mode, sets a focus evaluation area to have a larger size than the focus evaluation area set in an auto focus mode, generates assist information assisting adjustment of the in-focus object plane position based on a focus evaluation value obtained from an image of the focus evaluation area, and outputting the assist information to a display section.

Abstract: An endoscope apparatus includes a processor comprising hardware. The processor implements a motion information acquisition process that acquires motion information representing a relative motion with respect to an imaging section and an object, a motion information determination process that determines motion information reliability indicating reliability of the motion information, and a focus control process that determines whether or not to perform a focus operation to cause the imaging section to bring the object into focus based on the motion information and the motion information reliability.

Abstract: An endoscope system includes an image acquisition section, an attention area setting section, and a dimming control section. The image acquisition section acquires a captured image that includes an object image. The attention area setting section sets an attention area within the captured image based on information from the endoscope system. The dimming control section performs a dimming control process that controls the intensity of illumination light based on the attention area set by the attention area setting section.

Abstract: An endoscope apparatus comprises a processor comprising hardware. The processor is configured to implement a motion amount calculation process and a focus control process. The processor implements the motion amount calculation process that calculates a plurality of local motion amounts, calculates a correlation between each of the plurality of local motion amounts and a peripheral local motion amount, and calculates the relative motion amount based on a local motion amount among the plurality of local motion amounts that has the correlation higher than a given correlation. And the processor implements the focus control process that calculates a cumulative motion amount by accumulating the relative motion amount over N frames (wherein N is a natural number equal to or larger than 3), and causes the imaging section to perform a focus operation when it has been determined that the cumulative motion amount is larger than the first threshold value.

Abstract: An endoscope system includes an image acquisition section, an attention area setting section, and a dimming control section. The image acquisition section acquires a captured image that includes an object image. The attention area setting section sets an attention area within the captured image based on information from the endoscope system. The dimming control section performs a dimming control process that controls the intensity of illumination light based on the attention area set by the attention area setting section.