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公开(公告)号：US11547293B2
公开(公告)日：2023-01-10
申请号：US16637052
申请日：2017-08-14
Applicant: Optos PLC
Inventor： David Clifton
Abstract: A method of processing a sequence of images of a retina acquired by an ophthalmic device to generate retinal position tracking information indicative of retina movement during acquisition. The method includes (i) receiving one or more images of the retina; (ii) calculating a cross-correlation between a reference image and an image based on the received image(s) to acquire an offset between the image and reference image; and repeating processes (i) and (ii) to acquire, as the tracking information, respective offsets for images that are based on the respective received image(s). Another step includes modifying the reference image during the repeating, by determining a measure of similarity between correspondingly located regions of pixels in two or more received images and accentuating features in the reference image representing structures of the imaged retina in relation to other features in the reference image based on the determined measure of similarity.
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公开(公告)号：US20200058122A1
公开(公告)日：2020-02-20
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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3.发明申请METHODS AND APPARATUS FOR IMAGE PROCESSING, AND LASER SCANNING OPHTHALMOSCOPE HAVING AN IMAGE PROCESSING APPARATUS 有权用于图像处理的方法和装置，以及具有图像处理装置的激光扫描眼镜公开(公告)号：US20150254849A1
公开(公告)日：2015-09-10
申请号：US14404162
申请日：2013-05-28
Applicant: Optos PLC
Inventor： David Clifton
CPC classification number: G06T7/0014 , A61B3/1225 , G06K9/0061 , G06K9/4628 , G06K2009/00932 , G06T3/0068 , G06T3/0093 , G06T7/0016 , G06T7/42 , G06T2207/10004 , G06T2207/10024 , G06T2207/10056 , G06T2207/20016 , G06T2207/20032 , G06T2207/20036 , G06T2207/20064 , G06T2207/30041 , G06T2207/30201
Abstract: A laser scanning ophthalmoscope obtains images of a retina. An image is processed by (i) mapping an image along a one dimensional slice; (ii) computing a wavelet scalogram of the slice; (iii) mapping ridge features from the wavelet scalogram; repeating steps (i), (ii) and (iii) for one or more mapped image slices. The mapped ridge features from the slices are superimposed. Textural information is derived from the superimposed mapped ridge features. The analysis can be tuned to detect various textural features, for example to detect image artefacts, or for retinal pathology classification.
Abstract translation: 激光扫描检眼镜获得视网膜的图像。 通过（i）沿着一维切片映射图像来处理图像; （ii）计算切片的小波缩放图; （iii）从小波图示中绘制脊特征; 对于一个或多个映射的图像切片重复步骤（i），（ii）和（iii）。 来自切片的映射脊特征被叠加。 纹理信息是从叠加的映射脊特征导出的。 可以调整分析以检测各种纹理特征，例如检测图像伪影或视网膜病理学分类。
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4.发明申请公开(公告)号：US20240415385A1
公开(公告)日：2024-12-19
申请号：US18743202
申请日：2024-06-14
Applicant: Optos plc
Inventor： David Clifton
Abstract: Aspects of the present invention relate to a method of suppressing a banding artefact in an ophthalmic image of a patient's eye. The method comprises: partitioning the ophthalmic image into a plurality of segments that partially overlap each other, applying an image correction algorithm, which computes a discrete cosine transform of each segment of the plurality of segments to suppress the banding artefact in the plurality of segments removing at least part of the one or more overlapping regions from each segment to remove an artefact introduced by the image correction algorithm to generate a respective corrected segment; and combining the corrected segments to generate a corrected ophthalmic image that comprises less of the banding artefact than the ophthalmic image.
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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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Patent Agency Ranking
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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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：US20200237209A1
公开(公告)日：2020-07-30
申请号：US16637052
申请日：2017-08-14
Applicant: Optos PLC
Inventor： David Clifton
Abstract: A method of processing a sequence of images of a retina acquired by an ophthalmic device to generate retinal position tracking information indicative of retina movement during acquisition. The method includes (i) receiving one or more images of the retina; (ii) calculating a cross-correlation between a reference image and an image based on the received image(s) to acquire an offset between the image and reference image; and repeating processes (i) and (ii) to acquire, as the tracking information, respective offsets for images that are based on the respective received image(s). Another step includes modifying the reference image during the repeating, by determining a measure of similarity between correspondingly located regions of pixels in two or more received images and accentuating features in the reference image representing structures of the imaged retina in relation to other features in the reference image based on the determined measure of similarity.
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9.发明授权Methods and apparatus for image processing, and laser scanning ophthalmoscope having an image processing apparatus 有权用于图像处理的方法和装置，以及具有图像处理装置的激光扫描检眼镜公开(公告)号：US09390499B2
公开(公告)日：2016-07-12
申请号：US14404162
申请日：2013-05-28
Applicant: Optos PLC
Inventor： David Clifton
CPC classification number: G06T7/0014 , A61B3/1225 , G06K9/0061 , G06K9/4628 , G06K2009/00932 , G06T3/0068 , G06T3/0093 , G06T7/0016 , G06T7/42 , G06T2207/10004 , G06T2207/10024 , G06T2207/10056 , G06T2207/20016 , G06T2207/20032 , G06T2207/20036 , G06T2207/20064 , G06T2207/30041 , G06T2207/30201
Abstract: A laser scanning ophthalmoscope obtains images of a retina. An image is processed by (i) mapping an image along a one dimensional slice; (ii) computing a wavelet scalogram of the slice; (iii) mapping ridge features from the wavelet scalogram; repeating steps (i), (ii) and (iii) for one or more mapped image slices. The mapped ridge features from the slices are superimposed. Textural information is derived from the superimposed mapped ridge features. The analysis can be tuned to detect various textural features, for example to detect image artifacts, or for retinal pathology classification.
Abstract translation: 激光扫描检眼镜获得视网膜的图像。 通过（i）沿着一维切片映射图像来处理图像; （ii）计算切片的小波缩放图; （iii）从小波图示中绘制脊特征; 对于一个或多个映射的图像切片重复步骤（i），（ii）和（iii）。 来自切片的映射脊特征被叠加。 纹理信息是从叠加的映射脊特征导出的。 可以调整分析以检测各种纹理特征，例如检测图像伪像，或用于视网膜病理学分类。
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公开(公告)号：US20170032502A1
公开(公告)日：2017-02-02
申请号：US15222728
申请日：2016-07-28
Applicant: Optos PLC
Inventor： Jano van Hemert , Alan Fleming , David Clifton
IPC: G06T5/00
Abstract: The present disclosure provides a method of processing an image comprising receiving a measured image, producing a sharpened image by filtering the measured image to increase its sharpness, and transforming the sharpened image using at least one selected geometric transformation. The present disclosure further provides a computer readable media storing program instructions which, when executed, perform the method of processing an image and a system for processing an image comprising a receiving module which receives a measured image, a sharpening module which produces a sharpened image by filtering the measured image to increase its sharpness, and a transformation module which transforms the sharpened image using at least one selected geometric transformation.
Abstract translation: 本公开提供了一种处理图像的方法，包括接收测量图像，通过对所测量的图像进行滤波来提高其锐度，并使用至少一个选择的几何变换来变换锐利图像来产生锐化图像。 本公开还提供了一种存储程序指令的计算机可读介质，所述程序指令在被执行时执行处理图像的方法和用于处理包括接收测量图像的接收模块的图像的系统，所述锐化模块通过 过滤测量的图像以增加其清晰度;以及变换模块，其使用至少一个选择的几何变换来转换锐化的图像。
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