Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Source image data is subjected to a logarithmic process (gamma correction process) (S11), and the luminance distribution of source image data is acquired (S12). Then, it is determined whether or not the luminance distribution of source image data corresponds to “a high luminance scene (highlight scene) biased toward a high luminance side” based on a characteristic of a luminance value equal to or greater than a first threshold value in the luminance distribution of source image data (S13). According to the determination result (Y/N of S13), a restoration process based on a point spread function of an optical system is controlled (S14, S15). A restoration filter which is used in the restoration process has a filter coefficient corresponding to image data before the logarithmic process.

Abstract: 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 apparatus 35 includes a filtering process unit 41 that performs an image filtering process that has a plurality of times of filtering processes. The filtering process unit 41 applies 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.

Abstract: There are provided an image processing apparatus, an image processing method, a program, and a recording medium capable of compatibly achieving a high-accuracy filtering process and reduction in a necessary storage capacity. An image processing apparatus 35 includes a filtering process unit 41 that performs an image filtering process including a plurality of filtering processes. The filtering process unit 41 applies a filter to processing target data to acquire filter application process data, and 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 determined according to a pixel position in original image data.

Abstract: In a camera system including a camera body (200) and an interchangeable lens (100), the camera body includes a body-side communication unit, and a body-side control unit that transmits a request signal to the interchangeable lens via the body-side communication unit, and receives a response signal corresponding to the transmitted request signal from the interchangeable lens via the body-side communication unit, the interchangeable lens includes a lens-side communication unit, and a lens-side control unit that transmits the response signal corresponding to the received request signal to the camera body via the lens-side communication unit when receiving the request signal via the lens-side communication unit, and the lens-side control unit transmits lens information in synchronization with a frame of a video without receiving a request signal for lens information from the camera body at least in a video recording mode.

Abstract: 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.

Abstract: There are provided an image processing apparatus, an image processing method, a program, and a recording medium capable of compatibly achieving a high-accuracy filtering process and reduction in a necessary storage capacity. An image processing apparatus includes a filtering process unit that performs an image filtering process including a plurality of filtering processes. The filtering process unit applies a filter to processing target data to acquire filter application process data, and 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” specified based on an optical characteristic of an optical system used when the original image data is acquired, that is, the optical characteristic according to an imaging condition when the original image data is acquired.

Abstract: There are provided an image processing apparatus, an image processing method, and a program capable of realizing a desired image filtering process specified based on an optical characteristic of an individual optical system with high accuracy using a simple computation process. Further, there are provided a filter acquisition apparatus, a filter acquisition method, program, and a recording medium capable of acquiring a filter which is suitably usable in an image filtering process. A filtering process unit 41 (image processing apparatus 35) applies 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.

Abstract: An image processing unit 36 includes an information acquisition unit 40, a filter acquisition unit 42, and a filter processing unit 44. The information acquisition unit 40 acquires imaging information of original image data which is acquired by capturing an object image using an optical system. In a case in which the imaging information includes the first imaging condition and does not include the second imaging condition, the filter acquisition unit 42 acquires a sharpening filter which is associated with the first imaging condition and is associated with a representative condition of the second imaging condition. The filter processing unit 44 applies the sharpening filter acquired by the filter acquisition unit 42 to the original image data to acquire sharp image data.

Abstract: An image processing device according to an embodiment of the present invention obtains recovery image data by performing restoration processing using a restoration filter based on a point spread function of an optical system, on original image data obtained from an imaging element by imaging using the optical system. The restoration filter used in this restoration processing (a combination filter and realization filter Fr) is generated by combining multiple base filters Fb. Base filter Fb may be arbitrarily selected from filters that are confirmed beforehand to be effective to prevent image quality degradation.

Abstract: An image processing unit 36 includes a frequency analysis unit 40, an optical characteristic acquisition unit 42, and a filter acquisition unit 44. The frequency analysis unit 40 acquires data in the frequency domain of each of first image data and second image data which are acquired by capturing an object image using a first optical system and a second optical system, respectively. The optical characteristic acquisition unit 42 compares the data in the frequency domain of the first image data with the data in the frequency domain of the second image data to acquire frequency characteristic data related to optical characteristics of the second optical system. The filter acquisition unit 44 acquires a sharpening filter associated with the second optical system from a plurality of sharpening filters associated with the first optical system.

Abstract: An image processing unit 36 includes a frequency analysis unit 40, an optical characteristic acquisition unit 42, and a filter acquisition unit 44. The frequency analysis unit 40 acquires data in the frequency domain of each of first image data and second image data which are acquired by capturing an object image using a first optical system and a second optical system, respectively. The optical characteristic acquisition unit 42 compares the data in the frequency domain of the first image data with the data in the frequency domain of the second image data to acquire frequency characteristic data related to optical characteristics of the second optical system. The filter acquisition unit 44 acquires a sharpening filter associated with the second optical system from a plurality of sharpening filters associated with the first optical system.

Abstract: An image capturing device 100 includes: an image pickup unit 248; a chart storage unit 240; a chart transmission control unit 242; a calibration necessity determination unit 244 that determines whether or not calibration of the parameters of the point image restoration processing is required based on a calibration image that is obtained by imaging a calibration chart displayed on an external display device using the image pickup unit 248; a calibration control unit 246 that controls the execution of the calibration according to the determination regarding whether or not the calibration is required that has been performed by the calibration necessity determination unit 244; and a calibration execution unit 247.

Abstract: An image processing unit 36 includes an information acquisition unit 40, a filter acquisition unit 42, and a filter processing unit 44. The information acquisition unit 40 acquires imaging information of original image data which is acquired by capturing an object image using an optical system. In a case in which the imaging information includes the first imaging condition and does not include the second imaging condition, the filter acquisition unit 42 acquires a sharpening filter which is associated with the first imaging condition and is associated with a representative condition of the second imaging condition. The filter processing unit 44 applies the sharpening filter acquired by the filter acquisition unit 42 to the original image data to acquire sharp image data.

Abstract: 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.

Abstract: 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.

Abstract: There is provided an image processing device that acquires restored image data by performing restoration processing using a restoration filter based on the PSF of an optical system for original image data acquired by capturing a subject image using the optical system. This device includes a restoration processing unit 38 that performs restoration processing by applying the restoration filter to the original image data, a quasi-focus region detection unit 50 that detects a quasi-focus region in an original image corresponding to the original image data, and a sharpness restoration control unit 37. The sharpness restoration control unit adjusts the restoration strength magnification U for original image data of the detected quasi-focus region so as to be smaller than the restoration strength magnification U for original image data of at least a focus region.

Abstract: 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.