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公开(公告)号：US10719933B2
公开(公告)日：2020-07-21
申请号：US15964871
申请日：2018-04-27
发明人： Charles A. Reisman , Zhenguo Wang , Atsushi Kubota , Jonathan Liu
摘要： Methods and systems for angiographic imaging with optical coherence tomography (OCT) are described using ratio-based and angiographic deviation based calculations. In using these calculations to determine motion, arbitrary interframe permutations may be used, post-calculated, non-linear results for projection visualization may be averaged, poor matches may be eliminated on an A-line by A-line basis, windowing functions may be used to improve results, partial spectrums may be used when capturing data, and a minimum intensity threshold may be used for determining which pixels to use.
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公开(公告)号：US10602129B2
公开(公告)日：2020-03-24
申请号：US15094190
申请日：2016-04-08
发明人： Fumio Ohtomo , Hitoshi Otani , Masayuki Momiuchi , Kazuki Osaragi
IPC分类号： G01J3/28 , H04N13/00 , H04N5/225 , H04N7/18 , G06K9/36 , H04N13/296 , H04N13/25 , H04N13/257 , G06T7/80 , G06T7/246 , G06T7/285 , G01C11/02 , B64C39/02 , B64D47/08 , G06K9/00 , G06K9/62
摘要： An image acquiring device comprises a first camera 14 for acquiring video images, consisting of frame images continuous in time series, a second camera 15 being in a known relation with the first camera and used for acquiring two or more optical spectral images of an object to be measured, and an image pickup control device 21, and in the image acquiring device, the image pickup control device is configured to extract two or more feature points from one of the frame images, to sequentially specify the feature points in the frame images continuous in time series, to perform image matching between the frame images regarding the frame images corresponding to the two or more optical spectral images based on the feature points, and to synthesize the two or more optical spectral images according to the condition obtained by the image matching.
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公开(公告)号：US20200029809A1
公开(公告)日：2020-01-30
申请号：US16591905
申请日：2019-10-03
发明人： Masahiro AKIBA
摘要： A controller included in a blood flow measurement apparatus controls a scanner to iteratively scan one or more cross sections of an interested blood vessel. An image forming unit forms a phase image that represents chronological change in phase difference in the one or more cross sections based on data acquired through iterative scan. An image processor outputs a predetermined signal based on the chronological change in phase difference represented by the phase image. Upon receiving the predetermined signal, the controller controls the scanner to start scan for acquiring blood flow information on the interested blood vessel.
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公开(公告)号：US10478058B2
公开(公告)日：2019-11-19
申请号：US15528080
申请日：2015-11-19
发明人： Jun Cheng , Jiang Liu , Wing Kee Damon Wong , Masahiro Akiba
摘要： An optical coherence tomography (OCT) image composed of a plurality of A-scans of a structure is analyzed by defining, for each A-scan, a set of neighboring A-scans surrounding the A-slices scan. Following an optional de-noising step, the neighboring A-scans are aligned in the imaging direction, then a matrix X is formed from the aligned A-scans, and matrix completion is performed to obtain a reduced speckle noise image.
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公开(公告)号：US10473462B2
公开(公告)日：2019-11-12
申请号：US15004051
申请日：2016-01-22
发明人： Nobuyuki Nishita , Kaoru Kumagai
摘要： The system includes a survey machine having an image-taking section, a section of measuring a distance to a target and a section of measuring an angle, a pointing rod which is positioned on the measurement point X and includes, at a position deviated from a fixed length L from the measurement point, the prism, and an inclination sheet having a mark. The three-dimensional position of the measurement point is measured by equipping the inclination sheet to the pointing rod, imaging a mark surface in the image-taking section, calculating the inclination angle of the inclination sheet with respect to the eye direction from the survey machine by image-analyzing the mark surface, and determining the three-dimensional position of the measurement point from a three-dimensional position of the prism, the inclination angle of the inclination sheet and the fixed length.
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公开(公告)号：US20190290117A1
公开(公告)日：2019-09-26
申请号：US15928915
申请日：2018-03-22
发明人： Zhenguo Wang , Zhijia Yuan , Charles A. Reisman , Kinpui Chan
摘要： An interferometric imaging apparatus utilizes a split spectrum and/or frequency filtering process for generating fundus images. According to the split spectrum process, a bandwidth of a light source is divided into sub-spectrums of light, each used to generate pixel data for the fundus image. Data capture can thus be increased by a factor corresponding to the number of sub-spectrums. According to the frequency filtering process, a frequency filter associated with a depth of interest selectively retains data corresponding to that depth.
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公开(公告)号：US10331972B2
公开(公告)日：2019-06-25
申请号：US15008632
申请日：2016-01-28
摘要： A technique for making multiple still images, which are photographed by a traveling mobile body, and the traveled route of the photographing correspond to each other, is obtained. A survey data processing device includes an input unit 101, an image processing unit 102, and a synchronous processing unit 103. The input unit 101 is configured to receive image data of multiple still images, which are photographed from a mobile body flying, and receive flight data, in which a flight route of the mobile body is measured. The image processing unit 102 is configured to estimate a flight route of the mobile body based on changes in positions of feature points included in the multiple still images on a screen. The synchronous processing unit 103 is configured to specify a matching relationship between the flight route of the flight data and the estimated flight route.
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公开(公告)号：US10295328B2
公开(公告)日：2019-05-21
申请号：US15121470
申请日：2015-02-24
发明人： Akira Takada
IPC分类号： G01B9/02
摘要： A calibration method for improving distortion of a waveform of a point-spread-function without constantly executing feedback control to a wavelength-swept light source is provided. An interference signal is generated by varying voltage to be applied to a light source within one period, the interference signal is sampled at equal time intervals on a time axis, the point-spread-function is obtained through Fourier transform by multiplying by a first window function, and a complex analysis signal including frequency information of light is obtained through inverse Fourier transform by multiplying the point-spread-function by a second window function. After a variation in a frequency of the light relative to a time within one period is obtained at equal time intervals by unwrapping phase information of the complex analysis signal, a correspondence relationship between the variation in the frequency of the light within one period and a variation in voltage within one period is obtained.
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公开(公告)号：US10226175B2
公开(公告)日：2019-03-12
申请号：US15335861
申请日：2016-10-27
发明人： Jun Sakai , Makoto Fujino , Keisuke Arima , Ryoichi Yahagi
摘要： A fundus imaging apparatus includes a scanning optical system, a control circuit, and an image forming unit. The scanning optical system scans a fundus of a subject's eye with light from a light source, and receives return light from the fundus by a light receiver. The control circuit controls the scanning optical system such that a scanning locus is formed by the light in the fundus. The image forming unit forms an image of the fundus based on a light receiving signal from the light receiver and a position of the scanning locus. The control circuit is capable of performing an alignment mode, in which the control circuit controls the scanning optical system to project an alignment indicator for aligning the scanning optical system with the subject's eye on the fundus based on the light from the light source.
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公开(公告)号：US20180372492A1
公开(公告)日：2018-12-27
申请号：US16115805
申请日：2018-08-29
发明人： Fumio Ohtomo , Kaoru Kumagai
摘要： The invention provides a surveying instrument, which comprises a light emitting element for emitting a distance measuring light, a distance measuring light projecting unit for projecting the distance measuring light, a light receiving unit for receiving a reflected distance measuring light, a photodetection element for receiving the reflected distance measuring light and for producing a photodetection signal and a distance measuring unit for performing a distance measurement based on a light receiving result from the photodetection element, further comprises a first optical axis deflecting unit disposed on a projection optical axis of the distance measuring light for deflecting an optical axis of the distance measuring light at a deflection angle as required and in a direction as required, a second optical axis deflecting unit disposed on a light receiving optical axis for deflecting the reflected distance measuring light at the same deflection angle and in the same direction as the first optical axis deflecting unit and a projecting direction detecting unit for detecting a deflection angle and a deflecting direction by the first optical axis deflecting unit, wherein it is so arranged that the distance measuring light is projected through the first optical axis deflecting unit and the reflected distance measuring light is received by the photodetection element through the second optical axis deflecting unit and a three-dimensional data of a measuring point is obtained based on a distance measuring result of the distance measuring unit and a detection result of the projecting direction detecting unit.
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