Fujifilm Corporation

Yousuke Naruse

Kenkichi Hayashi

Masahiko Sugimoto

Kosuke Irie

Takashi Kunugise

Junichi Tanaka

Kousuke Irie

Hiroshi Endo

Michio Cho

Yasunobu Kishine

Takuya Tanaka

Provided are an image processing device, an image processing system, an image processing method, and an imaging optical system group capable of suppressing an increase in costs and appropriately restoring an image. In the imaging optical system, in a case where a first MTF curve Mindicating an MTF value in a first azimuth direction with respect to an amount of defocus from a focal position is compared with a second MTF curve Mindicating an MTF value in a second azimuth direction with respect to the amount of defocus from the focal position, a ratio of a peak value Pof the first MTF curve Mto a peak value Pof the second MTF curve Mis equal to or greater than 2, and a ratio of a half-value width HWof the second MTF curve Mto a half-value width HWof the first MTF curve Mis equal to or greater than 1.25. The restoration filter is a common filter corresponding to a representative value of transfer functions in a plurality of same type imaging optical systems.

Image processing device, image processing system, image processing method, and imaging optical system group

Provided are an image processing device, an imaging device, and an image processing method which are capable of obtaining a captured image with desired image quality. An image processing unit functioning as an image processing device includes a point image restoration processing unit that performs point image restoration processing using a restoration filter based on a point spread function of a lens unit on image data obtained from an imaging element through imaging of a subject using an imaging unit having a lens unit including a lens and the imaging element, and a determination unit that determines whether or not to perform the point image restoration processing using the point image restoration processing unit based on spherical aberration of the lens changed by an imaging condition. The point image restoration processing unit performs the point image restoration processing only in a case where the determination unit determines to perform the point image restoration processing.

Point image restoration device and method

Provided are an image processing device, an imaging device, and an image processing method which are capable of obtaining a captured image with desired image quality. An image processing unit functioning as an image processing device includes a point image restoration processing unit that performs point image restoration processing using a restoration filter based on a point spread function of a lens unit on image data obtained from an imaging element through imaging of a subject using an imaging unit having the lens unit including a lens and the imaging element, and a determination unit that determines to perform the point image restoration processing using the point image restoration processing unit in a case where a modulation transfer function in a predetermined spatial frequency in which the point image restoration processing contributes is smaller than a threshold value. Here, the modulation transfer function is changed by an imaging condition. The point image restoration processing unit performs the point image restoration processing only in a case where the determination unit determines to perform the point image restoration processing.

For causing a near-infrared light image obtained through imaging in a second imaging mode to be easily viewed while suppressing an increase in size and number of components, in a case where an imaging unit is operating in the second imaging mode, a change region where there is a change is detected through comparison with the second image data that the imaging unit has acquired before the second image data, from within the second image data acquired by the imaging unit. Combination image data obtained by combining the change region image data corresponding to the change region within the second image data with background image data of a color image generated on the basis of first image data acquired in a first imaging mode immediately before the second imaging mode by the imaging unit and corresponding to a background region different from the change region within the second image data is generated on the basis of the detection result of the change region.

Imaging device, image processing method and program for imaging device

An image processing device, an image processing system, and an image processing method capable of easily correcting image deterioration caused by nonuniform optical characteristics around an optical axis of a lens according to a position in a rotational direction of a lens barrel are provided. An image processing device includes a communication unit () that inputs a first image indicating a correction reference position in a rotation direction of a lens barrel () and a second image that is a correction target, the first image and the second image being obtained by imaging of the imaging device (), a rotation position recognition unit () that recognizes the correction reference position in the rotational direction on the basis of the first image, a correction information acquisition unit () that acquires correction information on the basis of the correction reference position in the rotation direction, and an image correction unit () that corrects the second image on the basis of the correction information.

Image processing device, image processing system, and image processing method

In a case where IR data of a near-infrared light image is data in which a visible light component and a near-infrared light component coexist, a point image restoration process is performed on the IR data using a first point image restoration filter based on a first point spread function for visible light of the optical system and a second point image restoration filter based on a second point spread function for near-infrared light of the optical system. An appropriate point image restoration process is performed on the IR data that is captured in a time zone of twilight or dawn by performing weighted averaging on a point image restoration process using the first point image restoration filter and a point image restoration process using the second point image restoration filter using a first gain &#x3b1; and a second gain &#x3b2; according to a light amount ratio between visible light and near-infrared light at the time of capturing the IR data.

Image processing device, imaging device, image processing method, and image processing program

Image data obtained by imaging of an imaging element capable of imaging a subject with sensitivity to a wavelength band of visible light and a wavelength band of near-infrared light via an optical system is acquired. A point image restoration process using a common restoration filter is performed on the image data of the subject captured with sensitivity to the wavelength band of the visible light by the imaging element and the image data of the subject captured with sensitivity to the wavelength band of the near-infrared light by the imaging element. The common restoration filter is calculated on the basis of average optical characteristics of the optical system obtained by performing weighted averaging of first optical characteristics with respect to the visible light of the optical system and second optical characteristics with respect to the near-infrared light of the optical system.

Imaging device, and image processing method and program for imaging device

An image processing device and an image processing method capable of satisfactorily performing a point image restoration process of a visible light image and a point image restoration process of a near-infrared light image are provided. A point image restoration process is performed on luminance data Y indicating a visible light image and IR data indicating a near-infrared light image using a first point image restoration filter based on a first point spread function with respect to visible light of an optical system and a second point image restoration filter based on a second point spread function with respect to near-infrared light of the optical system. An appropriate point image restoration process is performed on the IR data so that restoration strength (second gain &#x3b2;) in the point image restoration process for the IR data captured with radiation of near-infrared light is higher than restoration strength (first gain &#x3b1;) in the point image restoration process for the luminance data Y.

The present invention provides an image processing device, an imaging device, an image processing method, and a program which are capable of accurately correcting blurring caused in first image data of an image using a near-infrared ray as a light source and, accurately performing a point image restoration process on second image data of an image using visible light and a near-infrared ray as a light source. An image processing device according to an aspect of the present invention includes an image input unit, a determination unit that determines whether image data is first image data or second image data, a first restoration processing unit that performs a first restoration process using first restoration filters for performing phase correction and amplitude restoration on the determined first image data, and a second restoration processing unit that performs a second restoration process using second restoration filters for performing amplitude restoration without phase correction on the determined second image data.

Image processing device, imaging device, image processing method, and program

A restoration processing unit performs a restoration process based on an optical transfer function of an optical system for a target image. The entire angle of view of the optical system is greater than 90 degrees. A light amount evaluation region of the optical system is a region in which a distance from the center of an image formation plane is not less than 80% of half of the length of a diagonal line of an imaging surface of an imaging element. When a first evaluation wavelength is used, the ratio of the amount of light in the light amount evaluation region to the amount of light in a region of the optical system corresponding to the center of the image formation plane is not less than 25%. When a second evaluation wavelength is used, the value of the MTF of the optical system acquired at half of the Nyquist frequency of the imaging element is not less than 15%.

Imaging device, image processing device, image processing method, program, and recording medium

An optical system has the entire angle of view at a wide-angle end of not smaller than 90 degrees. A spatial frequency at which an MTF of the optical system acquired using an evaluation wavelength in a region of an image formation plane in which the distance from the center of the image formation plane is not less than 80% and less than 95% of half of the length of a diagonal line of an imaging surface of an imaging element image is not more than 30% is higher at the wide-angle end than at a telephoto end. When F&#x2265;&#x221a;(Fw&#xd7;Ft) is satisfied (where F indicates the focal length of the optical system when the target image is captured, Fw indicates the focal length at the wide-angle end, and Ft indicates the focal length at the telephoto end), a sharpening processing unit performs a restoration process based on an optical transfer function of the optical system as a sharpening process.

An image capturing apparatus according to an aspect of the present invention includes an image capturing unit, a display unit that displays an imaged picture imaged by the image capturing unit and a guide linearly shaped along a sagittal direction or a tangential direction in the imaged picture, the guide assisting imaging of a calibration image used for calibration in a point image restoration process, and a parameter calculation unit that calculates a parameter for the point image restoration process on the basis of the calibration image imaged by the image capturing unit with assistance from the guide.

Image capturing apparatus, calibration method, and non-transitory computer-readable medium for calculating parameter for a point image restoration process

A restoration filter generation device which generates a restoration filter for performing a restoration process on luminance system image data, the restoration process being based on a point-image distribution in an optical system, the luminance system image data being image data relevant to luminance and being generated based on image data for each color of multiple colors, the restoration filter generation device including an MTF acquisition device which acquires a modulation transfer function MTF for the optical system; and a restoration filter generation device which generates the restoration filter based on the modulation transfer function MTF, the restoration filter suppressing an MTF value of image data for each color of the multiple colors to 1.0 or less at least in a region of a particular spatial frequency or less, the image data for each color of the multiple colors corresponding to the luminance system image data after the restoration process.

Restoration filter generation device and method, image processing device and method, imaging device, and non-transitory computer-readable medium

An imaging lens consists of, in order from the object side, a first lens group fixed during focusing, and a positive second lens group moved toward the object side during focusing from a distant object to a close object. The second lens group consists of, in order from the object side, a first cemented lens consisting of a biconvex lens and a negative lens having a smaller absolute value of curvature radius of the object-side surface than that of the image-side surface, and a second cemented lens as a whole having a positive refractive power and consisting of a negative lens having a smaller absolute value of curvature radius of the image-side surface than that of the object-side surface and a positive lens having a smaller absolute value of curvature radius of the object-side surface than that of the image-side surface. The imaging lens satisfies specific condition expressions.

Imaging lens and imaging apparatus

Further, there are provided a filter acquisition apparatus, a filter acquisition method, a program, and a recording medium, capable of acquiring a filter which is suitably usable in such a filtering process. An image processing apparatusincludes a filtering process unitthat performs an image filtering process that has a plurality of times of filtering processes. The filtering process unitapplies a filter to processing target data to acquire filter application process data, applies a gain to the filter application process data to acquire gain application process data, in each filtering process. In each filtering process, the gain applied to the filter application process data is acquired based on a target frequency characteristic of the image filtering process.

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Saitama, Japan

Yousuke Naruse