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.

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.

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.

An imaging device 10 according to an aspect of the present invention includes: an image generation section 100 that generates a moving image; a filter acquisition section 105 that acquires a restoration filter corresponding to a transfer function for the point distribution of an optical system; an aperture value detection section 110 that detects an aperture value of the optical system; a restoration processing determination section 115 that determines whether or not the aperture value detected by the aperture value detection section 110 is equal to or greater than a small-aperture-blurring reference aperture value; and a restoration processing execution section 120 that executes the restoration processing on the moving image through the restoration filter, in case where the restoration processing determination section 115 determines that the aperture value detected by the aperture value detection section 110 is equal to or greater than the small-aperture-blurring reference aperture value.

A distance detecting device includes a distance calculation unit configured to calculate a distance to a target of imaging based on a first signal corresponding to a luminous flux having passed through a first pupil region of an exit pupil in an imaging optical system, and a second signal corresponding to a luminous flux having passed through a second pupil region different from the first pupil region, and a signal processing unit configured to perform a filtering process on at least one of the first signal and the second signal by using a band pass filter having a lower number of cells in a first direction than a number of cells in a second direction perpendicular to the first direction, and a filter for phase correction having a higher number of cells in the first direction than the number of cells in the second direction.

A focusing adjustment apparatus includes a focusing unit, a first acquisition unit, a second acquisition unit, and a control unit. The focusing unit outputs a first signal for a focusing operation. The first acquisition unit acquires first information, which is related to characteristics of a signal used for outputting the first signal, and second information, which is related to characteristics of a captured image and is predetermined. The second acquisition unit acquires third information on aberrations of an imaging optical system. The control unit calculates a correction value based on the first information, the second information, and the third information. By using the correction value, the control unit changes the first signal, output from the focusing unit, to a second signal used in the focusing operation.

At least one image processing apparatus is provided for preventing inadequate correction of, and to properly correct, a blur component in an image from occurring. The at least one image processing apparatus generates an image recovery filter for correcting chromatic aberration from an optical transmission function (OTF), and corrects the chromatic aberration of a captured image using the image recovery filter. Further, the at least one image processing apparatus calculates characteristics of a color blur of each area in a case where the image recovery filter has been used. Furthermore, the at least one image processing apparatus detects the remaining color blur in an edge of the image on which the chromatic aberration has been corrected using the image recovery filter from a result of calculating the characteristics of the color blur, and removes the color blur.

Disclosed are an image processing device, an imaging device, an image processing method, and an image processing program capable of, when recovering a deteriorated image due to a point spread function of an optical system, effectively performing phase recovery and suppressing the occurrence of artifact due to frequency recovery processing. The image processing device includes a phase recovery processing unit which subjects image data acquired from an imaging element by capturing an object image using an optical system to phase recovery processing using a phase recovery filter based on a point spread function of the optical system, a gradation correction processing unit which subjects image data subjected to the phase recovery processing to nonlinear gradation correction, and a frequency recovery processing unit which subjects image data subjected to the gradation correction to frequency recovery processing using a frequency recovery filter based on the point spread function of the optical system.

Disclosed are an image processing device, an imaging device, an image processing method, and an image processing program capable of, when recovering a deteriorated image due to a point spread function of an optical system, suppressing the occurrence of artifact and color gradation and achieving reduction in computational costs. The image processing device includes a frequency recovery processing unit which subjects image data acquired from an imaging element by capturing an object image using an optical system to frequency recovery processing using a frequency recovery filter based on a point spread function of the optical system, a gradation correction processing unit which subjects image data subjected to the frequency recovery processing to nonlinear gradation correction, and a phase recovery processing unit which subjects image data subjected to the gradation correction to phase recovery processing using a phase recovery filter based on the point spread function of the optical system.

A restoration filter generation device that generates a restoration filter for a restoration process on the basis of a point spread in an optical system, the restoration process being performed on luminance system image data as image data concerning a luminance which is generated on the basis of image data for each color of plural colors acquired by an image pickup device having the optical system, the restoration filter generation device includes a first transfer function acquisition device, a correction information acquisition device, a second transfer function acquisition device, a third transfer function calculation device, and a restoration filter generation device that generates the restoration filter for the restoration process on the basis of the third transfer function calculated by the third transfer function calculation device.