WO2011132280A1 - 撮像装置及び撮像方法 - Google Patents
撮像装置及び撮像方法 Download PDFInfo
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- WO2011132280A1 WO2011132280A1 PCT/JP2010/057103 JP2010057103W WO2011132280A1 WO 2011132280 A1 WO2011132280 A1 WO 2011132280A1 JP 2010057103 W JP2010057103 W JP 2010057103W WO 2011132280 A1 WO2011132280 A1 WO 2011132280A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0075—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. increasing, the depth of field or depth of focus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
- G02B2207/125—Wavefront coding
Definitions
- the present invention relates to an imaging apparatus and an imaging method.
- An imaging device such as a camera mounted on a digital camera or a mobile phone generally performs imaging processing by imaging a subject on a two-dimensional imaging element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). I do.
- a technique called WFC Wivefront Coding may be employed in such an imaging apparatus.
- FIG. 10 is a diagram schematically illustrating an optical system of a conventional imaging apparatus in which WFC technology is employed.
- the conventional imaging apparatus includes an optical system 90 and an imaging element 95.
- lenses 91 to 93 and a phase plate 94 which is a light wavefront modulation element are arranged.
- the phase plate 94 is arranged so that the phase plate 94 regularly disperses the light beam emitted from the subject to be imaged, and is applied to the light receiving surface of the image sensor 95. Deform the imaging. As a result, the image sensor 95 obtains an image out of focus (hereinafter sometimes referred to as “intermediate image”). Then, the imaging apparatus generates a subject image by performing digital processing such as an inverse filter on the intermediate image captured by the imaging element 95.
- the intermediate image obtained by the imaging device employing the WFC technology has a small amount of fluctuation in the degree of blur even when the relative position between the imaging device and the subject varies.
- the fluctuation amount of the blur degree is small between the intermediate image when the distance between the imaging device and the subject is H1 and the intermediate image when the distance between the imaging device and the subject is H2 (> H1).
- An imaging apparatus employing the WFC technology can expand the depth of field by generating a subject image by performing digital processing on such an intermediate image with a small fluctuation amount of the blur degree.
- FIGS. 11 and 12 are diagrams showing examples of the shape of the conventional phase plate 94 shown in FIG.
- FIG. 12 shows the shape of the phase plate 94 viewed from the Z-axis direction of FIG.
- a phase plate 94 having the shape illustrated in FIGS. 11 and 12 is used in a conventional imaging apparatus employing the WFC technology.
- the shape of such a conventional phase plate 94 is represented by the following formula (1), for example.
- phase plate 94 having the shape represented by the above formula (1) has a phase distribution orthogonal to the X-axis direction and the Y-axis direction. Specifically, the light that has passed through the phase plate 94 is focused on a region of the light receiving surface of the image sensor 95 that is orthogonal to the X-axis direction and the Y-axis direction.
- phase distribution of the phase plate 94 is expressed by, for example, the following formula (2).
- the PSF (Point Spread Function) of the optical system 90 including such a phase plate 94 is dispersed in two directions, the X-axis direction and the Y-axis direction, as in the example shown in FIG. Is asymmetric.
- a conventional imaging apparatus acquires an intermediate image using such an optical system 90 having a PSF, and generates a subject image by performing digital processing on the intermediate image.
- the subject image generated by the conventional imaging device may include a ghost.
- G which is the result of Fourier transform of PSF “g”
- OTF Optical Transfer Function
- MTF Modulation Transfer Function
- the conventional imaging device When the conventional imaging device performs digital processing on the intermediate image “h” to obtain the subject image “f”, for example, “H” that is the result of Fourier transform of the intermediate image “h”
- the inverse filter “H inv ” of OTF “G” is multiplied, and the multiplication result is inverse Fourier transformed.
- the conventional imaging apparatus calculates the subject image “F” after Fourier transform by performing multiplication represented by the following equation (5).
- the conventional imaging device generates a subject image “f” by performing inverse Fourier transform on the subject image “F”.
- the inverse filter “H inv ” shown in the following equation (5) is represented by the following equation (6).
- the conventional imaging apparatus may generate the subject image “f” by performing inverse Fourier transform on the inverse filter “H inv ” to obtain the inverse kernel “h inv ”.
- the conventional imaging device generates a subject image “f” by performing a convolution operation between the intermediate image “h” and the inverse kernel “h inv ” as shown in the following Expression (7). May be.
- the MTF does not become “0” until the spatial frequency becomes high, and the MTF is even when the focal position changes. There is a characteristic that the amount of fluctuation is small.
- the PSF of the conventional optical system 90 is dispersed in the orthogonal X-axis direction and Y-axis direction. Therefore, the absolute value MTF of OTF “G” calculated by Fourier transforming PSF “g” may be a value close to “0” in a region between the X-axis direction and the Y-axis direction.
- the MTF may be a value close to “0” in the region A11 or the like between the X-axis direction and the Y-axis direction.
- the inverse filter “H inv ” expressed by Equation (6) may have a large value in a region between the X-axis direction and the Y-axis direction, as in the example illustrated in FIG.
- a ghost may occur in the region between the X-axis direction and the Y-axis direction of the subject image “f”.
- FIG. 15 illustrates an example of a subject image generated using the inverse filter illustrated in FIG. In the example shown in FIG. 15, a ghost is generated in the areas A21 to A26 of the subject image.
- the PSF of the optical system is dispersed in two directions of the X axis direction and the Y axis direction, and thus the generated subject image includes a ghost. There is. That is, there are cases in which a conventional image pickup apparatus employing the WFC technology cannot generate a subject image with high accuracy.
- the disclosed technique has been made in view of the above, and an object thereof is to provide an imaging apparatus and an imaging method capable of generating a subject image with high accuracy.
- an imaging device disclosed in the present application includes an optical wavefront modulation element that disperses a light beam emitted from a subject in three or more directions, and an image sensor that receives and forms an image by receiving the light beam dispersed by the light wavefront modulation element And a generation unit that generates an image of the subject by performing processing corresponding to the dispersion on the subject image obtained by being imaged by the imaging element.
- FIG. 1 is a block diagram illustrating a configuration example of the imaging apparatus according to the first embodiment.
- FIG. 2 is a block diagram illustrating a configuration example of the imaging apparatus according to the second embodiment.
- FIG. 3 is a diagram illustrating an example of the shape of the phase plate in the second embodiment.
- FIG. 4 is a diagram illustrating an example of the shape of the phase plate in the second embodiment.
- FIG. 5 is a diagram illustrating an example of a PSF included in the optical system according to the second embodiment.
- FIG. 6 is a diagram illustrating an example of an inverse filter according to the second embodiment.
- FIG. 7 is a diagram illustrating an example of a subject image generated by the imaging apparatus according to the second embodiment.
- FIG. 1 is a block diagram illustrating a configuration example of the imaging apparatus according to the first embodiment.
- FIG. 2 is a block diagram illustrating a configuration example of the imaging apparatus according to the second embodiment.
- FIG. 3 is a diagram illustrating an example of the shape of the phase plate
- FIG. 8 is a diagram illustrating the depth of field characteristics of the imaging apparatus according to the second embodiment.
- FIG. 9 is a flowchart illustrating an imaging process procedure performed by the imaging apparatus according to the second embodiment.
- FIG. 10 is a diagram schematically illustrating an optical system of a conventional imaging apparatus in which WFC technology is employed.
- FIG. 11 is a diagram showing an example of the shape of the conventional phase plate shown in FIG.
- FIG. 12 is a diagram showing an example of the shape of the conventional phase plate shown in FIG.
- FIG. 13 is a diagram illustrating an example of a PSF included in a conventional optical system.
- FIG. 14 is a diagram illustrating an example of a conventional inverse filter.
- FIG. 15 is a diagram illustrating an example of a conventional subject image.
- FIG. 1 is a block diagram illustrating a configuration example of the imaging apparatus according to the first embodiment.
- the imaging apparatus 1 according to the first embodiment includes an optical system 10, an imaging element 20, and a generation unit 30.
- the optical system 10 makes light emitted from a subject to be photographed incident on the image sensor 20.
- the optical system 10 includes lenses 11 and 12 and a light wavefront modulation element 13.
- the lens 11 refracts light emitted from the subject.
- the light wavefront modulation element 13 disperses the luminous flux of the subject irradiated through the lens 11 in three or more directions, and the dispersed luminous flux enters the image sensor 20 via the lens 12.
- the light wavefront modulation element 13 forms an image of the light flux of the subject on a region of the light receiving surface of the imaging element 20 that is dispersed in three or more directions from an arbitrary position.
- the imaging element 20 receives the light beam dispersed by the light wavefront modulation element 13 and forms an image.
- the generation unit 30 generates a subject image by performing digital processing on a subject image obtained by being imaged by the image sensor 20. In other words, the generation unit 30 restores the subject image from the subject image that is an intermediate image.
- the imaging apparatus 1 according to the first embodiment disperses light beams emitted from the subject in three or more directions, and forms an image of the dispersed light beams.
- the imaging apparatus 1 according to the first embodiment has fewer regions in which the MTF has a value close to “0” during digital processing, as compared with the imaging apparatus in which the PSF illustrated in FIG. 13 is dispersed in two directions. That is, since the imaging apparatus 1 according to the first embodiment has a small area where the inverse filter “H inv ” has a large value, the area affected by noise can be reduced, and as a result, a ghost is generated in the subject image. This can be prevented. For this reason, the imaging apparatus 1 according to the first embodiment can generate a subject image with high accuracy.
- Example 2 an example of an imaging apparatus having PSFs distributed in three directions will be described.
- a configuration example of the imaging apparatus according to the second embodiment, a depth-of-field characteristic of the imaging apparatus according to the second embodiment, and an imaging process procedure performed by the imaging apparatus according to the second embodiment will be described in order.
- FIG. 2 is a block diagram illustrating a configuration example of the imaging apparatus according to the second embodiment.
- 2 is, for example, a digital camera, a camera mounted on a portable information terminal such as a mobile phone, a camera mounted on an image inspection apparatus, an industrial camera for automatic control, or the like.
- the imaging apparatus 100 includes an optical system 110, an imaging element 120, an ADC (Analog To Digital Converter) 130, a timing control unit 140, an image processing unit 150, a signal, A processing unit 160 and a control unit 170 are included.
- ADC Analog To Digital Converter
- the optical system 110 makes light emitted from a subject to be photographed incident on the image sensor 120.
- the optical system 110 includes lenses 111 to 113 and a phase plate 114.
- the lenses 111 and 112 refract light emitted from the subject to be imaged.
- the phase plate 114 is, for example, an optical wavefront modulation element, and disperses the luminous flux of the subject irradiated through the lenses 111 and 112 in three directions.
- the light beam dispersed by the phase plate 114 forms an image on the image sensor 120 via the lens 113.
- the phase plate 114 forms an image of the light flux of the subject on a region of the light receiving surface of the image sensor 120 that is dispersed in three directions from an arbitrary position.
- FIGS. 3 and 4 are diagrams illustrating examples of the shape of the phase plate 114 in the second embodiment.
- the phase plate 114 shown in FIG. 3 is arranged so that the XY plane of the phase plate 114 and the lens 112 and the lens 113 face each other.
- the phase plate 114 is inserted into the optical system 110 so that the lens 112 and the lens 113 are arranged in the Z-axis direction.
- the surface shape of the phase plate 114 is a shape in which three combinations of protruding convex portions and concave concave portions are formed.
- the surface shape of the phase plate 114 has a convex portion projecting in the direction in which the lens 112 is located on the periphery of the XY plane, and a recess in the direction in which the lens 112 is located. This is a shape in which three combinations with the recessed portions are formed.
- the phase plate 114 has three sets of convex portions protruding in the direction approaching the lens 112 and convex portions protruding in the direction away from the lens 112 alternately on the periphery of the XY plane. Shape.
- the shape of such a phase plate 114 is represented by the following formula (8), for example.
- phase plate 114 having the shape represented by the above formula (8) has a phase distribution dispersed in three directions from an arbitrary position on the XY plane. Specifically, the phase distribution of the phase plate 114 is expressed by, for example, the following formula (9).
- ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 shown in the above formula (9) are arbitrary coefficients.
- ⁇ 1 is “0.0196”
- ⁇ 2 is “ ⁇ 0.1363”
- ⁇ 3 is “ ⁇ 0.0288”
- ⁇ 4 is “0.0373”.
- the phase plate 114 in the second embodiment has a shape as illustrated in FIGS. 3 and 4 and has the phase distribution illustrated in the above formula (8), so that the light beam emitted from the subject can be dispersed in three directions. it can.
- the image sensor 120 forms an image of the light beam incident from the optical system 110. Specifically, the image sensor 120 receives the light beam dispersed by the phase plate 114 through the lens 113 and forms an image.
- Such an image sensor 120 is, for example, a CCD or a CMOS. Note that the subject image obtained by being imaged by the imaging device 120 is a blurred image in an out-of-focus state and an intermediate image because the light flux is dispersed by the phase plate 114.
- the ADC 130 converts the intermediate image of the analog signal input from the image sensor 120 into a digital signal, and outputs the intermediate image converted into the digital signal to the image processing unit 150.
- the timing control unit 140 controls the drive timing of the image sensor 120 and the ADC 130 in accordance with instructions from the signal processing unit 160.
- the image processing unit 150 performs a digital process on the intermediate image of the digital signal input from the ADC 130 to generate a subject image.
- the image processing unit 150 includes a buffer 151, a storage unit 152, a convolution operation control unit 153, and a convolution operation unit 154.
- the buffer 151 stores an intermediate image of the digital signal input from the ADC 130.
- the storage unit 152 stores kernel data for convolution calculation determined by the PSF of the optical system 110. Specifically, the storage unit 152 stores kernel data “h inv ” obtained by performing an inverse Fourier transform on an inverse filter “H inv ” of OTF “G” that is a result of Fourier transform of PSF “g”. For example, the storage unit 152 stores kernel data “h inv ” in association with the optical magnification. For example, the storage unit 152 stores kernel data “h inv ” in association with distance information between the imaging device 100 and the subject.
- the convolution operation control unit 153 performs replacement control of kernel data used for the convolution operation in accordance with control by the control unit 170. Specifically, the convolution calculation control unit 153 uses the kernel data used for the convolution calculation among the kernel data stored in the storage unit 152 based on the exposure information determined when the exposure is set by the control unit 170 described later. Select.
- the convolution operation unit 154 generates a subject image “f” by performing a convolution operation on the intermediate image of the digital signal stored in the buffer 151 based on the kernel data selected by the convolution operation control unit 153. To do. For example, when the intermediate image is “h” and the kernel data selected by the convolution operation control unit 153 is “h inv ”, the convolution operation unit 154 performs the convolution operation shown in the above equation (7). Thus, the subject image “f” is generated.
- FIG. 2 shows an example in which the convolution operation unit 154 generates a subject image by performing a convolution operation on the digital signal of the intermediate image based on the kernel data stored in the storage unit 152.
- the image processing unit 150 according to the second embodiment may generate a subject image by performing processing other than the above example.
- the storage unit 152 may store the inverse filter “H inv ” shown in the above equation (6) in association with the optical magnification or the like. Then, the convolution calculation control unit 153 selects a reverse filter for calculation from the reverse filters stored in the storage unit 152 based on the exposure information and the like determined by the control unit 170. Then, the convolution operation unit 154 performs the multiplication shown in the above equation (5) using the inverse filter selected by the convolution operation control unit 153 and the intermediate image of the digital signal stored in the buffer 151. Then, the convolution operation unit 154 may generate the subject image “f” by performing inverse Fourier transform on the multiplication result.
- the signal processing unit 160 performs color interpolation processing, white balance, YCbCr conversion processing, and the like on the subject image generated by the image processing unit 150. Further, the signal processing unit 160 stores the subject image subjected to the color interpolation processing or the like in a memory (not shown) or controls display on a display unit (not shown).
- the signal processing unit 160 is, for example, a DSP (Digital Signal Processor).
- the control unit 170 controls the entire imaging apparatus 100. Specifically, the control unit 170 controls the exposure of the light to the image sensor 120 or the ADC 130, the image processing unit 150, and the signal processing unit 160 according to the operation content input to the operation unit (not shown). Control the operation.
- FIG. 5 is a diagram illustrating an example of a PSF included in the optical system 110 according to the second embodiment.
- FIG. 6 is a diagram illustrating an example of an inverse filter according to the second embodiment.
- FIG. 7 is a diagram illustrating an example of a subject image generated by the imaging apparatus 100 according to the second embodiment.
- the PSF of the optical system 110 is dispersed in three directions.
- MTF which is the result of Fourier transform of such PSF, has a symmetric property and a smaller area close to “0” than MTF obtained by Fourier transform of PSF dispersed in two orthogonal directions.
- the inverse filter “H inv ” used by the imaging apparatus 100 according to the second embodiment has symmetry as in the example illustrated in FIG. For this reason, the inverse filter “H inv ” used by the imaging apparatus 100 according to the second embodiment has a smaller area susceptible to noise as compared to the example illustrated in FIG. 14.
- FIG. 7 shows an example of a subject image generated by the convolution operation unit 154. As shown in FIG. 7, the subject image generated by the convolution operation unit 154 does not cause a ghost compared to the subject image shown in FIG. 15. From the above, the imaging apparatus 100 according to the second embodiment can generate a subject image with high accuracy.
- FIG. 8 is a diagram illustrating the depth of field characteristics of the imaging apparatus 100 according to the second embodiment.
- the imaging device 100 according to the second embodiment and the imaging device in which the PSF is distributed in two directions will be compared to describe the depth of field characteristics.
- the distance between the imaging device and the subject is changed to “z1” and “z2”, and the square sum of the OTF differences is used as the evaluation function.
- the evaluation function EF Error Function
- the PSF dispersed in three directions as in the optical system 110 in the second embodiment has a smaller MTF difference according to the subject distance than the PSF dispersed in two orthogonal directions.
- the imaging device 100 according to the second embodiment can improve the depth of field characteristics as compared with the imaging device in which the PSF is distributed in two directions.
- FIG. 9 is a flowchart illustrating an imaging process procedure performed by the imaging apparatus 100 according to the second embodiment.
- the control unit 170 performs exposure control on the imaging element 120, and the ADC 130 and image processing are performed.
- the operations of the unit 150 and the signal processing unit 160 are controlled.
- the phase plate 114 disperses the luminous flux of the subject irradiated through the lenses 111 and 112 in three directions (step S102). Then, the light beam dispersed by the phase plate 114 forms an image on the image sensor 120 through the lens 113 (step S103). Thereby, the imaging apparatus 100 can obtain an intermediate image corresponding to the subject image to be photographed. Subsequently, the image processing unit 150 generates a subject image by performing a convolution operation on the intermediate image of the digital signal based on the kernel data (step S104).
- the imaging apparatus 100 according to the second embodiment includes the optical system 110 in which the PSF is dispersed in three directions, there are few regions where the MTF has a value close to “0” during digital processing. That is, since the imaging apparatus 100 according to the second embodiment has a small area where the inverse filter has a large value, the area affected by noise can be reduced, and as a result, a ghost is prevented from being generated in the subject image. be able to. For this reason, the imaging apparatus 100 according to the second embodiment can generate a subject image with high accuracy.
- phase plate 114 of the imaging apparatus 100 has the shape illustrated in FIGS. 3 and 4, the light beam emitted from the subject can be dispersed in three directions.
- phase plate 114 of the imaging apparatus 100 has a phase distribution represented by the above formula (9), the light beam emitted from the subject can be dispersed in three directions.
- the phase plate 114 may disperse light beams emitted from the subject in four or more directions.
- the surface shape of the phase plate 114 includes a convex portion that protrudes in the direction in which the lens 112 is located on the periphery of the XY plane, and a concave portion that is recessed in the direction in which the lens 112 is located. This can be realized by forming four or more combinations.
- the phase plate 114 has the shape illustrated in FIGS. 3 and 4 to disperse the light beam emitted from the subject in three directions.
- the phase plate 114 may be anything as long as it deforms the wavefront.
- the phase plate 114 may be an optical element such as a gradient index wavefront modulation lens whose refractive index changes.
- the optical system 110 has the phase plate 114.
- the lens 111, the lens 112, and the like of the optical system 110 may be integrated with the phase plate 114 so that the light beam emitted from the subject is dispersed in three directions.
- the light beam emitted from the subject may be dispersed in three directions.
Abstract
Description
まず、図2を用いて、実施例2に係る撮像装置について説明する。図2は、実施例2に係る撮像装置の構成例を示すブロック図である。図2に示した撮像装置100は、例えば、デジタルカメラ、携帯電話機等の携帯情報端末に搭載されるカメラ、画像検査装置に搭載されるカメラ、自動制御用産業カメラ等である。
次に、図8を用いて、実施例2に係る撮像装置100における被写界深度特性について説明する。図8は、実施例2に係る撮像装置100における被写界深度特性を示す図である。ここでは、実施例2に係る撮像装置100と、PSFが2方向に分散する撮像装置とを比較して、被写界深度特性について説明する。
上述してきたように、実施例2に係る撮像装置100は、PSFが3方向に分散する光学系110を有するので、デジタル処理時にMTFが「0」に近い値となる領域が少ない。すなわち、実施例2に係る撮像装置100は、逆フィルタが大きい値になる領域が少ないので、ノイズの影響を受ける領域を少なくすることができ、その結果、被写体画像にゴーストが生じることを防止することができる。このようなことから、実施例2に係る撮像装置100は、被写体画像を高精度に生成することができる。
10 光学系
11、12 レンズ
13 光波面変調素子
20 撮像素子
30 生成部
90 光学系
91 レンズ
94 位相板
95 撮像素子
100 撮像装置
110 光学系
111、112、113 レンズ
114 位相板
120 撮像素子
130 ADC
140 タイミング制御部
150 画像処理部
151 バッファ
152 記憶部
153 畳み込み演算制御部
154 畳み込み演算部
160 信号処理部
170 制御部
Claims (6)
- 被写体から発せられる光束を3方向以上に分散させる光波面変調素子と、
前記光波面変調素子により分散された光束を受光して結像する撮像素子と、
前記撮像素子により結像されて得られる被写体像に対して前記分散に対応する処理を施すことにより前記被写体の画像を生成する生成部と
を備えたことを特徴とする撮像装置。 - 前記光波面変調素子の表面形状は、
前記被写体から発せられる光束を受光する受光面の周縁に、突起している凸部と窪んでいる凹部との組合せが3個以上形成される形状であることを特徴とする請求項1に記載の撮像装置。 - 前記光波面変調素子により分散された光束を受光する前記撮像素子の受光面上において直交する2方向をx方向及びy方向とすると、
前記光波面変調素子は、
位相分布P(x,y)が、
P(x,y)=exp(i(α1x3+α2x2y+α3xy2+α4y3))
ただし、α1、α2、α3、α4は任意の値
であることを特徴とする請求項1に記載の撮像装置。 - 前記生成部は、
前記光波面変調素子を含む光学系の点像分布関数をフーリエ変換した光学伝達関数の逆フィルタに基づいて、前記撮像素子により結像されて得られる被写体像に対してデジタル処理を施すことにより前記被写体の画像を生成する
ことを特徴とする請求項1~3のいずれか一つに記載の撮像装置。 - 前記生成部は、
前記光波面変調素子を含む光学系の点像分布関数をフーリエ変換した光学伝達関数の逆フィルタを逆フーリエ変換した結果である逆カーネルに基づいて、前記撮像素子により結像されて得られる被写体像に対して畳み込み演算を行うことにより前記被写体の画像を生成する
ことを特徴とする請求項1~3のいずれか一つに記載の撮像装置。 - 被写体を撮像する撮像装置による撮像方法であって、
前記撮像装置が、
前記被写体から発せられる光束を3方向以上に分散させ、
分散された光束を結像して被写体像を取得し、
前記被写体像に対して前記分散に対応する処理を施すことにより前記被写体の画像を生成する
ことを特徴とする撮像方法。
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CN103916574A (zh) * | 2012-12-28 | 2014-07-09 | 株式会社日立制作所 | 摄像装置 |
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CN104580879B (zh) * | 2013-10-09 | 2018-01-12 | 佳能株式会社 | 图像处理设备、图像拾取设备以及图像处理方法 |
US20170296666A1 (en) * | 2016-04-18 | 2017-10-19 | Amneal Pharmaceuticals Company Gmbh | Stable Pharmaceutical Composition Of Amorphous Ticagrelor |
WO2018112433A1 (en) * | 2016-12-15 | 2018-06-21 | Ntt Docomo, Inc. | Ghost image elimination of doe using fourier optics method |
CN111641762B (zh) * | 2020-05-28 | 2021-11-02 | 维沃移动通信有限公司 | 摄像模组及电子设备 |
CN114615427B (zh) * | 2022-02-19 | 2023-11-28 | 复旦大学 | 一种基于小样本的波前编码场景数据集增强方法 |
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JP2014131099A (ja) * | 2012-12-28 | 2014-07-10 | Hitachi Ltd | 撮像装置 |
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US20130002893A1 (en) | 2013-01-03 |
CN102845052B (zh) | 2015-06-24 |
US8860845B2 (en) | 2014-10-14 |
JP5477464B2 (ja) | 2014-04-23 |
JPWO2011132280A1 (ja) | 2013-07-18 |
CN102845052A (zh) | 2012-12-26 |
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