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公开(公告)号：US11676255B2
公开(公告)日：2023-06-13
申请号：US17401957
申请日：2021-08-13
Applicant: Optos Plc
Inventor： Muzammil A. Arain , Jeffery Benshetler , Eugene Russiyanov , Tushar M. Ranchod
IPC: G06T5/50 , G06V40/18 , G06T7/73 , G06T3/40 , G06T11/00 , G06T7/11 , G06T7/64 , G06T7/00 , H04N23/90 , H04N23/698
CPC classification number: G06T5/50 , G06T3/4007 , G06T7/0014 , G06T7/11 , G06T7/64 , G06T7/73 , G06T11/00 , G06V40/193 , G06V40/197 , H04N23/698 , H04N23/90 , G06T2207/20021 , G06T2207/20068 , G06T2207/20081 , G06T2207/20221 , G06T2207/30041 , G06T2207/30204
Abstract: Generating a correction algorithm includes obtaining a model of an eye, the model including a front portion with optics to mimic a cornea and a lens of a human eye, and a rear portion having a generally hemispherical-shaped body to mimic a retina of the human eye. The rear portion includes physical reference lines on an inside surface of the generally hemispherical-shaped body. Images of the model are captured using an image capturing device aimed at the model. Vertices of the physical reference lines are identified according to a given projection technique for displaying generally hemispherical-shaped body in a two-dimensional image in the captured images. Idealized placement of the vertices of the physical reference lines is obtained according to the given projection technique. The result is a correction algorithm used to adjust any pixel of an image of an actual eye in the x-axis and in the y-axis.
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32.发明授权公开(公告)号：US11568540B2
公开(公告)日：2023-01-31
申请号：US16594934
申请日：2019-10-07
Applicant: OPTOS PLC
Inventor： David Clifton
Abstract: A method, system, and computer-readable medium, for detecting whether an eye blink or non-blink is captured in the image. The method includes filtering, from the image, one or more objects that are predicted to be unsuitable for determining whether an eye blink or no-blink is captured in the image, to provide a filtered image. The method also includes correlating the filtered image with a reference image, and determining, based on the correlating, whether the eye blink or non-blink is captured in the image. The eye blink is a full eye blink or a partial eye blink, and the images may be sequentially captured IR SLO images, in one example embodiment herein. Images determined to include an eye blink can be omitted from inclusion in a final (e.g., OCT) image.
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公开(公告)号：US11503994B2
公开(公告)日：2022-11-22
申请号：US16721902
申请日：2019-12-19
Applicant: Optos PLC
Inventor： Jano van Hemert , Derek Swan
Abstract: A computer-implemented method of searching for a region indicative of a pathology in an image of a portion of an eye acquired by an ocular imaging system, the method comprising: receiving image data defining the image; searching for the region in the image by processing the received image data using a learning algorithm; and in case a region in the image that is indicative of the pathology is found: determining a location of the region in the image; generating an instruction for an eye measurement apparatus to perform a measurement on the portion of the eye to generate measurement data, using a reference point based on the determined location for setting a location of the measurement on the portion of the eye; and receiving the measurement data from the eye measurement apparatus.
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公开(公告)号：US20220319070A1
公开(公告)日：2022-10-06
申请号：US17218480
申请日：2021-03-31
Applicant: OPTOS PLC
Inventor： Enrico Pellegrini
Abstract: A method of generating a segmentation confidence map by processing classification values each indicating a respective classification of a respective voxel of a retinal C-scan into a respective retinal layer class of a predefined set of retinal layer classes, the method comprising: generating, for each voxel, a respective confidence value which indicates a level of confidence in the classification of the voxel; for a retinal layer class of the predefined set, identifying a subset of the voxels such that the classification value generated for each voxel indicates a classification of the voxel into the retinal layer class; calculating, for each A-scan having voxels in the identified subset, a respective average of the confidence indicator values generated for the voxels; and using the calculated averages to generate the map, which indicates a spatial distribution of a level of confidence in the classification of the voxels.
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公开(公告)号：US20220142471A1
公开(公告)日：2022-05-12
申请号：US17492583
申请日：2021-10-02
Applicant: OPTOS PLC
Inventor： Praveen Ashok , Alan Anderson
Abstract: A method of processing C-scan data, which comprises a sequence of B-scans of an imaging target acquired by an OCT imaging system, to generate correction data for compensating for axial displacements between B-scans in the sequence caused by a relative motion of the OCT imaging system and the imaging target that varies a distance therebetween during acquisition of the B-scans, the correction data being generated by determining, for each pair of adjacent B-scans of a plurality of pairs of adjacent B-scans in the sequence, a respective indicator of an axial shift between respective representations of a common ocular feature in the adjacent B-scans; and determining, from a variation of the determined indicators with locations of the corresponding pairs of adjacent B-scans in the sequence, a first frequency component of the variation which is indicative of the relative motion during acquisition of the B-scans.
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Patent Agency Ranking
公开(公告)号：US20210298592A1
公开(公告)日：2021-09-30
申请号：US17207077
申请日：2021-03-19
Applicant: OPTOS PLC
Abstract: A technique for generating a mapping relating values of a scan parameter of an ocular imaging apparatus that are indicative of scan locations in an eye at which the apparatus acquires digital images of imaged regions of the eye, to respective values of a conversion factor for calculating a distance between designated ocular features in the imaged regions, by: simulating light ray propagation to relate each value of the scan parameter in a sequence of scan parameter values to a corresponding location in a model eye; calculating, for each scan parameter value, a distance between the corresponding location in the model eye and a location in the model eye corresponding to an adjacent value in the sequence; and using the calculated distances to generate a respective value of the conversion factor for each scan parameter value.
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公开(公告)号：US11080851B2
公开(公告)日：2021-08-03
申请号：US16543063
申请日：2019-08-16
Applicant: Optos PLC
Inventor： Peter Robert Wakeford , David Clifton
Abstract: A method, apparatus, and computer-readable medium, for assessing image quality of an image produced by a scanning imaging system. The method comprises acquiring (S10) image data of an image produced by the scanning imaging system and calculating (S20 to S40), for each section of the image: a respective first value measuring at least one of sharpness or contrast of at least a part of the section, the measuring depending on noise, a respective second value measuring noise in at least a part of the section, and a respective third value indicating image quality, by combining the first and second values. The combining is such that calculated third values have a weaker dependency on the noise than the first values. The method further comprises determining (S50) a quality score that is indicative of image quality of the image based on a variation of the calculated third values among the sections.
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38.发明申请公开(公告)号：US20210104041A1
公开(公告)日：2021-04-08
申请号：US16594934
申请日：2019-10-07
Applicant: OPTOS PLC
Inventor： David Clifton
Abstract: A method, system, and computer-readable medium, for detecting whether an eye blink or non-blink is captured in the image. The method includes filtering, from the image, one or more objects that are predicted to be unsuitable for determining whether an eye blink or no-blink is captured in the image, to provide a filtered image. The method also includes correlating the filtered image with a reference image, and determining, based on the correlating, whether the eye blink or non-blink is captured in the image. The eye blink is a full eye blink or a partial eye blink, and the images may be sequentially captured IR SLO images, in one example embodiment herein. Images determined to include an eye blink can be omitted from inclusion in a final (e.g., OCT) image.
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公开(公告)号：US20210100448A1
公开(公告)日：2021-04-08
申请号：US17036184
申请日：2020-09-29
Applicant: Optos Plc
Inventor： Daniel Hurst
Abstract: An imaging system for generating an image of a region of an eye, comprising: an ocular imaging device controlled by a control module to acquire, from a first viewpoint, a first ocular image of the region having an image artefact caused by obstruction from imaging of a part of the region by an object, and a second ocular image from a predetermined second viewpoint, which shows at least a portion of the part of the region that was obstructed from imaging during acquisition of the first ocular image; and an image data processing module for combining the first and second ocular images to generate an enhanced ocular image having an image artefact caused by obstruction from imaging by the object which is smaller in relation to the image artefact in the first or second ocular image, or no such image artefact.
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公开(公告)号：US20210093194A1
公开(公告)日：2021-04-01
申请号：US17035152
申请日：2020-09-28
Applicant: NIKON CORPORATION , OPTOS PLC
Inventor： Gonzalo MUYO , Alistair GORMAN , David M. WILLIAMSON , Makoto FUJIMOTO , Yasufumi NISHI , Azuna NONAKA , Katsuya WATANABE , Miwako YOSHIDA , Kyoya TOKUNAGA , Masahiro MIZUTA
Abstract: The ophthalmic optical system is configured to apply an angular scanning light ray to an eye. M=|ωout/ωin| is defined, where ωin represents an angle between an incident light ray to the ophthalmic optical system and an optical axis of the ophthalmic optical system, and ωout represents an angle between an exiting light ray exiting from the ophthalmic optical system toward the eye and the optical axis. The ophthalmic optical system satisfies a conditional expression Mpar
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