Olympus Corporation

Keiji Higuchi

Koichiro Yoshino

Yasunori Morita

Naoya Kuriyama

Seigo On

Jumpei Takahashi

An endoscope apparatus including an imaging section that includes a phase difference detection element for implementing phase detection autofocus, and acquires a captured image; a phase difference calculation section that calculates a phase difference based on a signal output from the phase difference detection element; a lens position selection section that selects a lens position that is either a near point-side lens position or a far point-side lens position based on the phase difference, the near point-side lens position and the far point-side lens position being discrete lens positions set in advance; a driver section that changes a lens position of the imaging section to the lens position selected by the lens position selection section; and a control section that controls an intensity of illumination light that is applied to an object. The lens position selection section determines whether or not the intensity is smaller than a given threshold value when the phase difference calculation section cannot detect the phase difference, selects the near point-side lens position when the lens position selection section has determined that the intensity is smaller than the threshold value, and selects the far point-side lens position when the lens position selection section has determined that the intensity is larger than the threshold value.

Endoscope apparatus and focus control method for endoscope apparatus

A reflected light image and a fluorescent light image of an observed region are acquired with an imaging system. A gradation level of the reflected light image is set on the basis of a feature value of the acquired reflected light image. The focus of the imaging system is controlled in accordance with the set gradation level. The fluorescent light image is corrected using a focus-controlled reflected light image of the observed region. Accordingly, the image of an object in the observed region from which the fluorescent light is generated is sharpened.

Image processing device, imaging device, computer-readable storage medium, and image processing method

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.

Endoscope system and method for operating endoscope system

An endoscope apparatus includes an imaging section that includes a phase difference detection element for implementing phase detection autofocus, and acquires a captured image, a phase difference calculation section that calculates a phase difference based on a signal output from the phase difference detection element, a lens position selection section that selects a lens position that is either a near point-side lens position or a far point-side lens position based on the phase difference, the near point-side lens position and the far point-side lens position being discrete lens positions set in advance, and a driver section that changes a lens position of the imaging section to the lens position selected by the lens position selection section.

An endoscope system includes an image acquisition section, an attention area setting section, and a scaling 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 scaling section performs a local scaling process that relatively enlarges the attention area as compared with another area.

Endoscope system which enlarges an area of a captured image, and method for operating endoscope system

A focus control device in an endoscope system, implements an autofocus operation in an appropriate state by setting a focus mode of an imaging optical system. The focus control device includes a focus control section that controls a focus of an imaging optical system that includes at least a zoom lens that adjusts an optical magnification, and sets a focus mode of the imaging optical system, and an image acquisition section that acquires an image through the imaging optical system, the focus mode including a fixed focus mode and an autofocus (AF) mode, and the focus control section switching the focus mode between the fixed focus mode and the AF mode corresponding to whether the zoom lens is positioned on a wide-angle side or a telescopic side relative to a reference point that is situated between a wide-angle end and a telescopic end.

Focus control device, endoscope device, and focus control method

An object is to improve noise reduction. Provided are an image-capturing-mode selecting portion () that selects one image-capturing mode from a plurality of image-capturing modes; and a noise-reduction processing portion () that performs noise-reduction processing for input image signals by employing, in the case in which the image-capturing mode selected by the image-capturing-mode selecting portion () is a specific image-capturing mode, an applied noise model in which a noise model employed for a predetermined signal-value region differs from a reference noise model determined on the basis of properties of an image-acquisition element.

Image processing apparatus, method, and computer-readable recording medium having image processing program recorded thereon

An image signal processing apparatus that performs a noise reduction process on an image signal of an image captured by an imaging device is provided. By performing a first smoothing process on an input signal of an image signal that is received from an imaging unit and that is subjected to a first image processing, a first smoothed signal creating unit creates a first smoothed signal in which noise is reduced. By performing a second smoothing process that is different from the first smoothing process on the input signal, the second smoothed signal creating unit creates a second smoothed signal in which noise is reduced. A mixing processing unit mixes the first smoothed signal and the second smoothed signal in accordance with a mixing ratio according to a value of the input signal.

Image signal processing apparatus and image signal processing method

An image processing device includes a normal light image acquisition section that acquires a normal light image including an object image that includes information within a wavelength band of white light, a special light image acquisition section that acquires a special light image including an object image that includes information within a specific wavelength band, an isolated point determination section that performs an isolated point determination process on a normal light processing target pixel based on a pixel value of the normal light processing target pixel, the normal light processing target pixel being a processing target pixel included in the normal light image, and a correction control section that controls a correction process performed on the special light image based on the isolated point determination process performed by the isolated point determination section.

Image processing device and information storage medium

A device includes a first isolated-point candidate detection section calculates a parameter value used for detecting an isolated-point candidate from a near-field region of a target pixel of a color image signal, a color-space conversion section combines a plurality of signals constituting the color image signal together, and converts the combined signals into a plurality of color signals on defined color space, a second isolated-point candidate detection section calculates a parameter value used for detecting an isolated-point candidate from a near-field region of a target pixel of the converted color signal, and an isolated-point degree determination section determines an isolated-point degree on the basis of parameter values calculated by the isolated-point candidate detection sections.

Image processing device and image processing program

An image processing device includes a predominant color edge detection unit for detecting an edge using a predominant color signal which is a color signal with a highest appearance frequency from among plural color signals forming an input image signal, and a sub-color parameter calculation unit for calculating, with respect to a sub-color signal which is a color signal other than the predominant color signal in the plural color signals, from a pixel of interest and neighboring pixels of a same color as the pixel of interest, a sub-color parameter value related to a degree of isolated point of the pixel of interest. The image processing device further includes a sub-color isolated point correction unit for correcting the pixel of interest based on the sub-color parameter value and information of the detected edge.

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Kunitachi, Japan

Keiji Higuchi