WO2011108207A1 - ゴースト検出装置およびそれを用いる撮像装置、ゴースト検出方法、および、ゴースト除去方法 - Google Patents
ゴースト検出装置およびそれを用いる撮像装置、ゴースト検出方法、および、ゴースト除去方法 Download PDFInfo
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- WO2011108207A1 WO2011108207A1 PCT/JP2011/000906 JP2011000906W WO2011108207A1 WO 2011108207 A1 WO2011108207 A1 WO 2011108207A1 JP 2011000906 W JP2011000906 W JP 2011000906W WO 2011108207 A1 WO2011108207 A1 WO 2011108207A1
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- 238000003384 imaging method Methods 0.000 title claims abstract description 163
- 238000001514 detection method Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 132
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
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- 238000004088 simulation Methods 0.000 description 2
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B43/00—Testing correct operation of photographic apparatus or parts thereof
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/77—Retouching; Inpainting; Scratch removal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/58—Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/08—Stereoscopic photography by simultaneous recording
- G03B35/12—Stereoscopic photography by simultaneous recording involving recording of different viewpoint images in different colours on a colour film
Definitions
- the present invention relates to a method and apparatus for detecting a ghost in an imaging apparatus, an imaging apparatus including the apparatus, and a ghost removal method.
- Patent Document 1 When removing a ghost in the imaging apparatus, conventionally, as shown in Patent Document 1, for example, the position of a light source is estimated by some method, and the ghost position is determined by simulation from the position of the light source and removed. .
- Patent Document 2 proposes a method for estimating a ghost position by changing a focus or moving a pan head to estimate a light source position.
- the accuracy of ghost detection is a problem with the accuracy of light source position measurement and the accuracy of simulation, and it takes cost and time to obtain high accuracy.
- the method for estimating the position of the light source is based on the premise that the light source is reflected in the captured image, and there is a problem that it cannot be detected when the light source is not reflected. Further, with the method of Patent Document 2, it is impossible to detect a ghost in real time.
- An object of the present invention is to provide a ghost detection device capable of accurately detecting a ghost occurrence position in real time, an imaging device using the ghost detection device, and a ghost detection method.
- the ghost detection device of the present invention compares two imaging optical systems having different ghost occurrence conditions with each other in the same imaging condition, and mutually equivalent imaging ranges in the captured images of the two imaging optical systems. And a ghost determination unit for determining a ghost part.
- FIG. 1 is a block diagram of an imaging apparatus 1 that uses a ghost detection and removal method according to an embodiment of the present invention.
- the imaging apparatus 1 is realized as a so-called digital still camera, movie camera, or the like, and has a function of detecting a ghost and outputting a removed captured image as one function thereof.
- the imaging apparatus 1 includes an image processing apparatus 2 including a first camera C1 that is a main imaging optical system, a second camera C2 that is a sub imaging optical system, and a ghost determination unit for performing the ghost detection and removal. And is configured.
- the two cameras C1 and C2 have different ghost manifestations under the same imaging conditions. Specifically, these cameras C1 and C2 differ in at least one of an adjustment method of angle (field angle, optical axis direction), resolution (lens group, number configuration, etc.), and manufacturing variation. Thus, even if images are captured under the same image capturing conditions (capturing the same subject from approximately the same direction), a difference occurs in the ghost manifestation state.
- the first camera C1 constitutes the main imaging optical system capable of imaging with high definition image quality from a wide-angle range to a telephoto range
- the second camera C2 is mounted on a terminal device of a relatively wide-angle mobile phone.
- the inexpensive sub-imaging optical system is configured. In this case, even if the same subject 3 is imaged from the same direction, a ghost is generated on the wide-angle end side of the first camera C1 having a large lens group configuration and a large number of lenses and having a high resolution (resolution) as compared with the second camera C2. easy.
- first and second cameras C1 and C2 have the same imaging optical system, if the angle of view and the angle in the optical axis direction are different, a difference occurs in the ghost occurrence status. Further, the first and second cameras C1 and C2 have the same imaging optical system, and even if each is manufactured within a predetermined tolerance range, manufacturing variation occurs, and the lens barrel is assembled so that the variation is reduced. At the time of attachment, a difference occurs in the appearance of the ghost by rotating the lens halfway (180 °) between the first and second cameras C1 and C2.
- FIG. 2 is a block diagram showing a functional configuration of the image processing apparatus 2. Since the image processing apparatus 2 is mounted on the digital still camera, movie camera, and the like, the image processing apparatus 2 includes a microprocessor and its peripheral circuit device (in FIG. 1, a personal computer is shown, but will be described later). This is the case of application to a simple ghost detection device).
- the image processing apparatus 2 is configured to store the captured image from the first and second cameras C1 and C2 temporarily, and the correspondence of the subject 3 between the two captured images. Based on the image position specifying unit 22 for specifying the position and the image position information obtained by the image position specifying unit 22, the mutually equal imaging ranges in the two captured images are compared with each other to obtain the luminance value.
- a ghost detection / removal unit 23 that determines a bright portion with a shift as the ghost location, creates an image from which the ghost is removed, and outputs the image to the storage device 21 as described above, and an image from which the ghost has been removed as appropriate
- an image output unit 24 for reading out and outputting the data.
- the ghost-removed image from the image output unit 24 is appropriately stored in a memory card, a hard disk device, or the like.
- the original image corresponding to the ghost-removed image is erased from the storage device 21.
- 3 and 4 are flowcharts for explaining the processing operation in the image processing apparatus 2.
- 3 shows a ghost detection operation
- FIG. 4 shows a ghost removal operation.
- captured images from the first and second cameras C1 and C2 are taken into the storage device 21 for one frame.
- the image position specifying unit 22 determines which part of the subject 3 in the captured image from the first camera C1, which is the main imaging optical system, of the captured image of the second camera C2, which is the sub-imaging optical system. Whether it exists at a position is specified by pattern matching using a corresponding point search method described later as an example.
- step S3 the ghost detection / removal unit 23 compares the luminance values of the same part of the subject 3 in the two captured images, and if there is a difference greater than or equal to a predetermined value. It is determined that a ghost has occurred, the higher one is regarded as a ghost, its position is determined, and output is made in step S4.
- step S13 the ghost detection / removal unit 23 compares the luminance values of the same part of the subject 3 in the two captured images, and if there is a difference greater than or equal to a predetermined value. It is determined that a ghost has occurred, and a ghost-removed image is created by adopting the lower luminance value, and is output in step S14.
- FIG. 5 is a diagram for explaining a method of specifying an image position in the image position specifying unit 22.
- the imaging range of the first camera C1 that is the above-described high-resolution main imaging optical system is W1
- the imaging range of the second camera C2 that is the low-resolution sub-imaging optical system is W2. If they are set in such a relationship that W1 is included in W2 as shown in FIG. 1, the obtained captured images are as shown in FIGS. 5 (a) and 5 (b), respectively.
- the image position specifying unit 22 uses a captured image of the first camera C1 as a standard image I1, and a captured image of the second camera C2 as a reference image I2, and associates similar feature points by the corresponding point search method, The position of each part of the subject 3 on each image is specified.
- the corresponding point search method calculates, for example, the similarity at a plurality of corresponding point candidate positions on the reference image I2 shown in FIG. 6B with respect to the point of interest P on the standard image I1 shown in FIG.
- a corresponding point candidate position having a high degree of similarity is detected. Specifically, it is determined where a certain point of interest P (single pixel or a plurality of pixel blocks) on the reference image I1 shown in FIG. 6A is on the reference image I2 shown in FIG. Starting from the same position as that on the base image I1, the correlation calculation is performed at each position while changing the position on the reference image I2 in the baseline length direction. When the correlation calculation is completed for all the pixels, the similarity peak having the highest similarity (reliability) on the reference image I2 with respect to the target point P set on the base image I1 is calculated from the correlation value. Search for.
- a window w1 having a size corresponding to each predetermined pixel is set on the standard image I1 in the vertical and horizontal directions.
- a window w2 having the same size is also set on the reference image I2, and the reference image I2 is started from the same position as the window w1 on the standard image I1, and the position is changed within a certain range in the baseline length direction.
- the correlation value R (x, y) is calculated at each position as follows. For these calculations, the brightnesses I 1 (i, j) and I 2 (i, j) between corresponding pixels at the same coordinates (i, j) in the windows w1 and W2 are used.
- the image position specifying unit 22 is different in the size and direction of the captured images of the first and second cameras C1 and C2, as in the case of the main imaging optical system and the sub imaging optical system. Furthermore, in order to make the contrasted imaging ranges and resolutions equal to each other, at the time of contrasting the captured images from the first and second cameras C1 and C2, at least one image is enlarged or reduced, By performing at least one of deformation and rotation, an imaging range and resolution equal to each other are obtained.
- the coordinate position conversion method in the case of enlargement and reduction can be expressed as follows, for example, by muffin conversion. However, (x ′, y ′) is an xy coordinate to be enlarged or reduced, (x, y) is an xy coordinate to be enlarged or reduced (that is, before conversion), and a, b, c, d are converted. It is a parameter, and s and t are shift amounts.
- the ghost detection / removal unit 23 performs the processing shown in FIG. As shown in FIG. 8B, the luminance values of the same part of the subject 3 in the two captured images I1 and I2 are compared, and if there is a difference greater than or equal to a predetermined value, it is determined that a ghost has occurred. Then, as indicated by reference numeral G in FIG. 8 (a), the higher one is regarded as a ghost, and its position is determined.
- the ghost detection / removal unit 23 adopts a lower luminance value for a portion having a luminance difference equal to or greater than the predetermined value, so that the ghost detection / removal unit 23 as shown by a reference symbol G ′ in FIG. A high-resolution reference image I1 ′ from which G has been removed can be obtained.
- the photographing apparatus 1 is provided with two cameras C1 and C2 for detecting and removing a ghost in a digital still camera, a movie camera, and the like, and between these cameras C1 and C2.
- the resolution resolution
- the image processing apparatus 2 compares the mutually equal imaging ranges W1 in the captured images I1 and I2 of the two cameras C1 and C2 with each other by pattern matching, and shows a bright part having a deviation in luminance value. It is determined that the ghost G as shown in FIG.
- the image of the bright part is the same subject position (that is, dark) in the other camera as shown in FIG. Since the captured image I1 ′ is generated by replacing the ghost G generated in the bright part as indicated by the reference symbol G ′, the ghost G generation position is accurately and in real time. It is possible to make a determination, and it is possible to create a captured image I1 ′ in which the ghost G is removed accurately and in real time.
- the sizes and directions of the captured images I1 and I2 ′ are different, and at least one of enlargement or reduction, deformation, and rotation of the reference image I2 ′.
- 7A particularly when enlargement as shown in FIGS. 7A to 7B is performed, if a low luminance value is simply used to remove the ghost G, the image I1 ′ after removal is removed. Resolution may be degraded.
- the average luminance ave (I2) around the ghost G occurrence location in the reference image I2 ′ and the average luminance ave (I1) around the ghost G occurrence location in the reference image I1. Is subtracted from the luminance value I1 (i, j) of the reference image I1. That is, if x and y are the amounts of displacement in the respective directions, the output image I1 ′ (i, j)
- I1 ′ (i, j) I1 (i, j) - ⁇ Ave (I1 (i, j))-ave (I2 (ix, jy)) ⁇ Can be obtained from
- the second camera C2 added for detecting and removing the ghost G as described above includes a foveal lens in its imaging optical system, so that the imaging range W2 of the second camera C2 is increased. Even if the imaging range W1 of the first camera C1 is included, the ghost G can be detected with high accuracy with a relatively high resolution (resolution) in the vicinity of the center. The enlargement process as described above can be reduced.
- the foveal lens is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-272578 filed by the present applicant.
- the image position determination unit 22 may maintain the corresponding position for a predetermined period instead of searching for the corresponding position by the corresponding point search method every time the images I1 and I2 are captured.
- the corresponding position relationship may be stored in advance. In this case, it is possible to eliminate a complicated processing for searching for corresponding points.
- the above-described corresponding point search method since alignment is performed by pattern matching, ghost detection with higher accuracy can be performed.
- the optical focal length in the first camera C1 is F1
- the imaging element size (diagonal length) is S1
- Is F2 and the image sensor size is S2, S1 / F1 ⁇ S2 / F2
- the numerical aperture (NA) of the second camera C2 is larger, and therefore the resolution (resolution) of the first camera C1 is higher as described above. It becomes the main imaging optical system, and the imaging range (field angle, field of view) W1 of the first camera C1 is included in the imaging range W2 of the second camera C2.
- the above equation is such that the optical focal length F1 is satisfied within a predetermined range on the short focal side. That is, on the long focal point side where the possibility of occurrence of ghost G is small, the above expression is removed.
- the numerical aperture (NA) is increased unnecessarily, and therefore it is not necessary to reduce the resolution (resolution).
- the first camera C1 having a variable magnification optical system can be used. Can be detected and removed with high accuracy.
- FIG. 9 is a perspective view showing a schematic configuration of the camera 11 in the imaging apparatus using the ghost detection and removal method according to another embodiment of the present invention.
- the camera 11 includes two optical systems (compound eyes) C1a and C2a that are equal (compound eyes) to each other.
- Each of the optical systems C1a and C2a includes lenses L1 and L2 and imaging elements S1 and S2. It should be noted that the two lenses L1 and L2 are integrally formed. As a result, the angle (the angle of view, the optical axis direction) between the two imaging optical systems C1a and C2a can be adjusted collectively.
- the focal points of the two optical systems C1a and C2a are fixed in this way, and they are configured integrally, and the calibration is appropriately performed, thereby corresponding points between the two captured images I1 and I2. Is suitable for determining (decision) in advance.
- one image sensor S0 may be divided into areas to form a plurality (four in FIG. 10) of image sensors of lenses L1 to L4. Thereby, it is possible to suppress a shift in projection position due to aging or the like between the imaging optical systems.
- a so-called stereo camera is configured by setting the two imaging optical systems to the same configuration, and 2 in the stereo camera.
- the detection and removal of ghosts in one imaging optical system can be performed in common with other imaging optical systems.
- the accuracy can be further improved by providing three or more similar imaging optical systems and detecting and removing ghosts between any two imaging optical systems.
- the first and second cameras C ⁇ b> 1 and C ⁇ b> 2 that are imaging optical systems and the image processing device 2 that is a ghost determination unit are configured to be separable from each other
- the image processing apparatus 2 can be a ghost inspection apparatus for the two cameras C1 and C2, and the ghost appearance of the two cameras C1 and C2 can be inspected at the time of manufacturing the lens.
- the imaging apparatus 1 only detects the ghost G as described above, only the processing of FIG. 3 may be performed, and when only the removal is performed, only the processing of FIG. 4 may be performed.
- the ghost detection device of the present invention compares two imaging optical systems having different ghost occurrence conditions with each other in the same imaging condition, and mutually equivalent imaging ranges in the captured images of the two imaging optical systems. And a ghost determination unit for determining a ghost part.
- the ghost detection apparatus of the present invention is characterized by further comprising a ghost removal unit that creates a captured image from which the ghost has been removed from the ghost location determined by the ghost determination unit.
- the ghost removing unit may replace the ghost portion in the image captured by one imaging optical system with an image of the same subject position in the other imaging optical system or correct the ghost. It is characterized by removing.
- the ghost determination unit determines that a portion having a luminance difference of a predetermined value or more is a ghost portion as a result of the comparison of captured images by the two imaging optical systems. .
- the two imaging optical systems are characterized in that at least one of an imaging range, a resolution, and a method for adjusting variations at the time of manufacture is different.
- two image pickup optical systems are provided for detecting the ghost for the purpose of removing the ghost.
- at least one of an imaging range, an angle of the imaging optical system (field angle, optical axis direction), resolution (lens group, number configuration, etc.), and a manufacturing variation adjustment method are provided between these imaging optical systems.
- the ghost determination unit determines a ghost part by comparing image pickup ranges obtained by the two image pickup optical systems with the same image pickup range by pattern matching. Specifically, a bright part having a difference in luminance value in the contrast image is determined as the ghost location. Therefore, it is possible to accurately detect the ghost occurrence position in real time.
- the ghost determination unit performs at least one of enlargement, reduction, deformation, and rotation on at least one of the images captured by the two imaging optical systems.
- the captured images of the two imaging optical systems are compared.
- the ghost determination unit performs at least one of enlargement or reduction, deformation, and rotation on at least one image before the comparison.
- the same imaging range can be compared for ghost detection even if the size and direction of the captured image are different. Also, there may be a difference in the size and capability of the imaging optical system as in the main and sub imaging optical systems, and the sub imaging optical system added for ghost detection can be simplified to reduce the cost. You can also
- the optical focal length in one of the two imaging optical systems is F1
- the imaging element size is S1
- the optical focal length in the other imaging optical system is F2.
- the element size is S2, S1 / F1 ⁇ S2 / F2.
- the other imaging optical system has a larger numerical aperture (NA), and thus one imaging optical system has higher resolution (resolution), and the sub imaging optical system and the main imaging optical system, respectively.
- the imaging range of the main imaging optical system (view angle and field of view) is included in the imaging range of the sub imaging optical system.
- the one imaging optical system can be scaled, and the optical focal length F1 is a predetermined range on the short focal side in the one imaging optical system.
- the variable magnification optical system is provided in one imaging optical system in which the resolution (resolution) is high as described above.
- the optical focal length F1 is satisfied within a predetermined range on the short focal side.
- NA numerical aperture
- the ghost detection device of the present invention is characterized in that the two imaging optical systems are integrally formed. According to the above configuration, since the lens and the like are integrally formed, the angles (view angle and optical axis direction) between the two imaging optical systems can be collectively adjusted.
- the image pickup device in the two image pickup optical systems is realized by dividing one image pickup device into areas. According to this configuration, it is possible to suppress a deviation due to aging between the two imaging optical systems.
- the other imaging optical system includes a foveal lens. According to this configuration, even if the other imaging optical system includes the imaging range of the one imaging optical system, it is possible to perform ghost detection with high accuracy with a relatively high resolution (resolution) near the center.
- the ghost detection device of the present invention is further characterized by further comprising a third imaging optical system having the same characteristics as the one imaging optical system.
- the one imaging optical system and the third imaging optical system constitute a so-called stereo camera, and ghost detection in the two imaging optical systems in the stereo camera is performed with respect to the other imaging optical system. Can be done.
- the two imaging optical systems and the ghost determination unit can be separated from each other, and the ghost determination unit serves as a ghost inspection device for the two imaging optical systems.
- the ghost determination unit can be a ghost inspection device when manufacturing two imaging optical systems such as lenses.
- the imaging device of the present invention is characterized by including the above-described ghost detection device. According to said structure, the imaging device which can detect the ghost generation
- the present invention relates to a ghost detection method, and the method includes an acquisition step of acquiring two captured images by two imaging optical systems having different ghost expression conditions under the same imaging condition; Comparing the same imaging range in the two captured images acquired in the acquisition step; And a ghost determination step of determining a portion having a luminance difference equal to or greater than a predetermined value as a ghost portion as a result of the comparison.
- the ghost detection method of the present invention is characterized by further comprising a ghost removal step of creating a picked-up image from which the ghost has been removed from the ghost location determined by the determination step.
- two image pickup optical systems are provided in creating a picked-up image from which a ghost is removed in a digital still camera, a movie camera, or the like.
- at least one of the angle (field angle, optical axis direction), resolution (lens group, number configuration, etc.) and manufacturing variation adjustment method of the imaging optical system is different between the imaging optical systems.
- the ghost can be removed by comparing mutually equal imaging ranges in the captured images of the two imaging optical systems by pattern matching or the like.
- a bright part having a deviation in luminance value is a ghost part, so that the image of the bright part is replaced with an image of the same subject position (that is, the dark part side) in the other imaging optical system or
- a captured image from which the ghost generated in the bright part is removed is created. Therefore, it is possible to create a captured image in which ghosts are accurately removed in real time.
- two imaging optical systems having different ghost occurrence states are used, and the ghost occurrence location is determined by comparing the same captured images in the captured images of the two imaging optical systems.
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Abstract
Description
上記構成要素を備えることで本願発明においては、ゴーストの発生位置を正確に、かつリアルタイムで検出することができる。
図1は、本発明の実施の一形態に係るゴースト検出および除去方法を用いる撮像装置1のブロック図である。この撮像装置1は、いわゆるデジタルスチルカメラやムービーカメラなどとして実現され、その1つの機能としてゴーストを検出し、除去した撮像画像を出力する機能を有するものとする。この撮像装置1は、主撮像光学系である第1のカメラC1と、副撮像光学系である第2のカメラC2と、前記ゴースト検出および除去を行うためのゴースト判定部を含む画像処理装置2とを備えて構成される。
-{ave(I1(i,j))-ave(I2(i-x,j-y))}
から求めることができる。
S1/F1≦S2/F2
の関係に設定されている。その場合、前記第2のカメラC2の方が開口数(NA)が大きくなり、したがって前述のように第1のカメラC1の方が分解能(解像度)が高くなり、それぞれ前述の副撮像光学系および主撮像光学系となり、第2のカメラC2の撮像範囲W2に第1のカメラC1の撮像範囲(画角、視野)W1が包含されるようになる。
図9は、本発明の実施の他の形態に係るゴースト検出および除去方法を用いる撮像装置におけるカメラ11の模式的構成を示す斜視図である。このカメラ11は、相互に等しい(複眼)2つの光学系(複眼)C1a,C2aを備えて構成される。各光学系C1a,C2aは、レンズL1,L2と、撮像素子S1,S2とを備えて構成される。注目すべきは、前記2つのレンズL1,L2レンズが一体として形成されていることである。これによって、2つの撮像光学系C1a,C2a間のアングル(画角、光軸方向)を一括して調整することができる。
前記取得工程において取得された2つの撮像画像における相互に等しい撮像範囲を対比する工程と、
前記対比の結果、所定値以上の輝度差がある箇所をゴースト箇所と判定するゴースト判定工程とを有することを特徴とする。
Claims (17)
- 同じ撮像条件において、ゴーストの発現状況が相互に異なる2つの撮像光学系と、
前記2つの撮像光学系の撮像画像における相互に等しい撮像範囲を相互に対比することで、ゴースト箇所を判定するゴースト判定部とを有することを特徴とするゴースト検出装置。 - 前記ゴースト判定部により判定されたゴースト箇所に対し、ゴーストを除去した撮像画像を作成するゴースト除去部をさらに備えたことを特徴とする請求項1記載のゴースト検出装置。
- 前記ゴースト除去部は、一方の撮像光学系による撮像画像におけるゴースト箇所を他方の撮像光学系における同じ被写体位置の画像で置き換え、または、補正することにより、ゴーストを除去することを特徴とする請求項2記載のゴースト検出装置。
- 前記ゴースト判定部は、前記2つの撮像光学系による撮像画像の対比の結果、所定値以上の輝度差がある箇所をゴースト箇所と判定することを特徴とする請求項1~3のいずれか1項に記載のゴースト検出装置。
- 前記2つの撮像光学系間は、撮像範囲、解像度、および製造時のばらつきの調整方法の内の少なくとも1つが異なることを特徴とする請求項1~4のいずれか1項に記載のゴースト検出装置。
- 前記ゴースト判定部は、前記2つ撮像光学系による撮像画像に対して、相互に等しい撮像範囲をパターンマッチングによって対比することにより、ゴースト箇所を判定することを特徴とする請求項1~5のいずれか1項に記載のゴースト検出装置。
- 前記ゴースト判定部は、前記2つの撮像光学系による撮像画像のうち、少なくとも一方の画像に対して、拡大、縮小、変形および回転の少なくとも1つを行うことで、前記2つの撮像光学系の撮像画像を対比することを特徴とする請求項1~6のいずれか1項に記載のゴースト検出装置。
- 前記2つの撮像光学系のうち、一方の撮像光学系における光学焦点距離をF1、撮像素子サイズをS1とし、他方の撮像光学系における光学焦点距離をF2、撮像素子サイズをS2とするとき、
S1/F1≦S2/F2
であることを特徴とする請求項1~7のいずれか1項に記載のゴースト検出装置。 - 前記一方の撮像光学系が変倍可能であり、前記光学焦点距離F1は、前記一方の撮像光学系における短焦点側の所定範囲であることを特徴とする請求項8に記載のゴースト検出装置。
- 前記2つの撮像光学系が一体として形成されていることを特徴とする請求項1~7のいずれか1項に記載のゴースト検出装置。
- 前記2つの撮像光学系における撮像素子が、1つの撮像素子をエリア分割して構成されていることを特徴とする請求項10に記載のゴースト検出装置。
- 前記他方の撮像光学系に、中心窩レンズを備えることを特徴とする請求項8に記載のゴースト検出装置。
- 前記一方の撮像光学系と同一特性の第3の撮像光学系をさらに備えることを特徴とする請求項8,9、または、12のいずれか1項に記載のゴースト検出装置。
- 前記2つの撮像光学系とゴースト判定部とは分離可能であることを特徴とする請求項1~12のいずれか1項に記載のゴースト検出装置。
- 前記請求項1~13のいずれか1項に記載のゴースト検出装置を備えることを特徴とする撮像装置。
- 同じ撮像条件において、ゴーストの発現状況が相互に異なる2つの撮像光学系により2つの撮像画像を取得する取得工程と、
前記取得工程において取得された2つの撮像画像における相互に等しい撮像範囲を対比する対比工程と、
前記対比の結果、所定値以上の輝度差がある箇所をゴースト箇所と判定するゴースト判定工程とを有することを特徴とするゴースト検出方法。 - 前記判定工程により判定されたゴースト箇所に対し、ゴーストを除去した撮像画像を作成するゴースト除去工程をさらに備えたことを特徴とする請求項16記載のゴースト検出方法。
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