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45 results about "Foveola" patented technology

The foveola is located within a region called the macula, a yellowish, cone photo receptor filled portion of the human retina. The foveola is approximately 0.35 mm in diameter and lies in the center of the fovea and contains only cone cells, and a cone-shaped zone of Müller cells. In this region the cone receptors are found to be longer, slimmer and more densely packed than anywhere else in the retina, thus allowing that region to have the potential to have the highest visual acuity in the eye.

Wide-field of view (FOV) imaging devices with active foveation capability

The present invention comprises a foveated imaging system capable of capturing a wide field of view image and a foveated image, where the foveated image is a controllable region of interest of the wide field of view image.
Owner:MAGIC LEAP INC

System and method for high-resolution with a small-format focal-plane array using spatial modulation

This invention provides a system and method for balanced-demodulation procedures that remove image clutter even in the presence of scene motion. A system that employs balanced demodulation moves a chopping reticle located in the intermediate focal plane where front end optics focus a high-resolution image. The chopping reticle has a checkerboard pattern of clear and opaque cells and moves in an uneven rate (e.g. Δx≠Δy) along the x-axis and y-axis. The resulting image is projected on a focal plane array from which differences are calculated to generate the desired balanced demodulation value. This invention further provides a foveal enhancement of the baseline spatial-modulation staring sensor. In this enhancement the WFOV low-resolution conventional image is displayed to the operator, but with a selectable subarea of that image replaced by a conventionally generated high-resolution image at the same scale. The operator would be able to naturally select the region for foveal enhancement by simply pointing directly at the detail of special interest which would then be displayed to the user at high-resolution. The remainder of the scene would be displayed at low-resolution, typically with marks at the locations of point sources detected by the spatial modulation.
Owner:AERODYNE RES

Image re-projection for foveated rendering

Technologies for improving foveated rendering of an image by improving the position of the image to be displayed through image re-projection are disclosed. For example, a method may include receiving a first estimation of a predicted gaze point of a user on a display device that is determined before starting rendering a high-quality portion of the image. The method may further include causing the image to be rendered based on the first estimation of the predicted gaze point. The method may also include receiving a second estimation of the predicted gaze point. The second estimation of the predicted gaze point is determined after rendering of the high-quality portion of the image has started. Responsive to determining that the second estimation of the predicted gaze point is different from the first estimation, the method may include adjusting the rendered image based on the second estimation of the predicted gaze point and transmitting the adjusted image to the display device for display.
Owner:TOBII TECH AB

Ocular parameter-based head impact measurement using a face shield

ActiveUS20200305708A1Effectively mitigate concussionAlleviate concussionInput/output for user-computer interactionEye diagnosticsNystagmus presentVisual perception
A system and / or method for measuring a human ocular parameter comprises a human-wearable face shield which has an eye sensor, a head orientation sensor, and an electronic circuit, and a face shield. The eye sensor comprises a video camera that measures horizontal eye movement, vertical eye movement, pupillometry, and / or eyelid movement. The head orientation sensor measures pitch and / or yaw of the wearer's face. The electronic circuit is response to the eye sensor and the head orientation sensor and measures an ocular parameter such as vestibulo-ocular reflex, ocular saccades, pupillometry, pursuit tracking during visual pursuit, vergence, eye closure, focused position of the eyes, dynamic visual acuity, kinetic visual acuity, virtual retinal stability, retinal image stability, foveal fixation stability, or nystagmus.
Owner:NOVUTZ LLC

Ocular-performance-based head impact measurement applied to rotationally-centered impact mitigation systems and methods

A system or method for measuring human ocular performance can be implemented using an eye sensor, a head orientation sensor, and an electronic circuit. The device is configured for measuring vestibulo-ocular reflex, pupillometry, saccades, visual pursuit tracking, vergence, eyelid closure, dynamic visual acuity, retinal image stability, foveal fixation stability, focused position of the eyes or visual fixation of the eyes at any given moment and nystagmus. The eye sensor comprises a video camera that senses vertical movement and horizontal movement of at least one eye. The head orientation sensor senses pitch and yaw in the range of frequencies between 0.01 Hertz and 15 Hertz. The system is implemented as part of an impact reduction helmet that comprises an inner frame having interior pads configured to rest against a person's head and one or more shock absorption elements attached between the inner frame and the spherical shell that couple the spherical shell to the inner frame. The spherical shell has a circular geometry, that when viewed horizontally at its horizontal midplane, includes a center point that is the rotational center of the spherical shell. The one or more shock absorption elements are sized to provide greater spacing between the inner frame and the spherical shell at the sides and rear of the spherical shell than at the front of the spherical shell. The one or more shock absorption elements are sized to configure the alignment of the rotational center of the spherical shell with the proximate rotational center of the wearer's head.
Owner:NOVUTZ LLC

Bionic eye using system capable of preventing eyes from feeling tired after long time use and preventing and curing eye diseases such as shortsightedness

The invention discloses a bionic eye using system capable of preventing eyes from feeling tired after long time use and preventing and curing eye diseases such as shortsightedness. The reason that theancients and all land animals are hardly shortsighted is decoded in the aspect of bionics, and the essence of the reason is fused with the prior art to form the bionic eye using system capable of preventing eyes from feeling tired after long time use and preventing eye diseases such as shortsightedness. A reading rack comprises a movement guiding device, or a movement guiding device and a peripheral visual field stimulating device; the movement guiding device is used for driving a reading matter to move regularly, and aims to drive switching operation among different visual cells in the center of a retina, drive the ciliaris, crystalline lens, extraocular muscle and sclera to perform switching operation between a tensioned state and a relaxed state continuously, and utilizes the subconsciousness of all animals for the sensibility of dynamic conditions to adjust the visual desires; the peripheral visual field stimulating device is used for changing the peripheral visual field blood circulation of the eye ground, bidirectionally adjusting the lengths of optical axes, promoting the lengths of optical axes for shortsightedness and farsightedness to recover towards the emmetropia direction and promoting the periphery of the eye ground with astigmatism to recover towards the emmetropia direction by the elongated eye axes.
Owner:丛繁滋

Lens, glasses and device for preventing and controlling myopia and lens preparation method

The invention discloses a lens, glasses and device for preventing and controlling myopia and a lens preparation method. The lens is characterized in that the absolute value of the diopter of a lens body is smaller than the absolute value of the actual optometry diopter of the eyeballs of a myopia person, and a lightproof film is arranged on the surface of the central area of the lens body and provided with a plurality of micropores. Because the absolute value of the diopter of the lens body is smaller than the absolute value of the actual optometry diopter of the eyeballs of the myopic person,the lens body cannot completely correct the ametropia of the myopic person, and the permissible diffusion circle is located in front of the retina; after the central area is subjected to the action of the micropores, the allowable dispersion circle can move backwards, so that the allowable dispersion circle just falls into the central concave part of the macula lutea of the retina, clear centralvision is provided for the myopic person, and the allowable dispersion circle is still kept at a relatively front position due to the fact that the peripheral area of the lens body is not limited by the micropores. Therefore, myopia defocusing is formed on the peripheral retinas, and finally the effect of preventing and controlling juvenile myopia is achieved.
Owner:WENZHOU MEDICAL UNIV

Eye fundus image recognition method and device, equipment, storage medium and program product

The invention discloses an eye fundus image recognition method and device, equipment, a storage medium and a program product, and relates to the technical field of artificial intelligence such as computer vision, deep learning and intelligent medical treatment. A specific embodiment of the method comprises the following steps: acquiring a position of a fundus focus, a position of a macular fovea center, a lesion level of a retina and a lesion probability value of a macular region in a fundus image; establishing the correlation between each feature and the lesion type of the macular region based on the position of the fundus focus, the position of the fovea center of the macular, the lesion level of the retina and the lesion probability value of the macular region; performing feature screening based on the correlation between each feature and the lesion type of the macular region; and inputting the screened features into a pre-trained macular region classification decision tree to obtain the category of the macular region. According to the embodiment, computer-assisted eye fundus image recognition is utilized, so that the labor cost is greatly reduced.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD

Optimized shadows and adaptive mesh skinning in foveated rendering system

A method for implementing a graphics pipeline. The method includes building a first shadow map of high resolution, and building a second shadow map based on the first shadow map of lower resolution. The method includes determining a light source affecting a virtual scene, and projecting geometries of objects of an image of the virtual scene onto a plurality of pixels of a display from a first point-of-view. The method includes determining a foveal region when rendering the image, wherein the foveal region corresponds to where an attention of a user is directed. The method includes determininga first set of geometries is drawn to a first pixel, determining the first set of geometries is in shadow based on the light source, and determining the first set of geometries is outside of the foveal region. The method includes rendering the first set of geometries using the second shadow map.
Owner:SONY COMPUTER ENTERTAINMENT INC

Ocular-performance-based head impact measurement using a faceguard

A system or method for measuring human ocular performance can be implemented using an eye sensor, a head orientation sensor, and an electronic circuit. The device is configured for measuring vestibulo-ocular reflex, pupillometry, saccades, visual pursuit tracking, vergence, eyelid closure, dynamic visual acuity, retinal image stability, foveal fixation stability, focused position of the eyes or visual fixation of the eyes at any given moment and nystagmus. The eye sensor comprises a video camera that senses vertical movement and horizontal movement of at least one eye. The head orientation sensor senses pitch and yaw in the range of frequencies between 0.01 Hertz and 15 Hertz. The system is implemented as part of a faceguard.
Owner:NOVUTZ LLC

OCT image-based Alzheimer's disease risk prediction method and system and medium

The invention relates to an OCT image-based Alzheimer's disease risk prediction method and system and a medium. The OCT image-based Alzheimer's disease risk prediction method comprises the following steps that a fundus OCT image is input into a trained retina segmentation model to obtain a segmentation mask of a retina region; a fundus OCT image is input into a trained choroid segmentation model to obtain a segmentation mask of a choroid region; the position of a macular central recess is detected; the distance between the upper and lower boundaries of the retina segmentation mask and the choroid segmentation mask at the macular central recess is calculated to obtain the retina thickness and the choroid thickness at the corresponding positions; and the omentum thickness, the choroid thickness and the age and gender information of the person taking the fundus OCT image are input into an optimized multi-index Logistic regression model to obtain the disease risk level of the Alzheimer's disease. The retina and choroid segmentation and thickness measurement are carried out by adopting a Unet network structure, the accuracy is high, a multi-factor disease risk prediction model is constructed, and a more reliable result for predicting the Alzheimer's disease patient can be provided.
Owner:PING AN TECH (SHENZHEN) CO LTD

High-specificity diabetic retinopathy characteristic detection method and storage equipment

The invention relates to the technical field of medical image processing, in particular to a high-specificity diabetic retinopathy characteristic detection method and storage equipment. The high-specificity diabetic retinopathy characteristic detection method comprises the following steps: carrying out focus characteristic detection on a lesion area of a fundus image through a preset step; preprocessing the fundus image processed by the preset step; extracting a main blood vessel of the preprocessed fundus image; performing optic disc delineation and macular foveal delineation on the preprocessed fundus image according to the main blood vessel; and further perfecting the specificity of focus feature detection according to the optic disc delineation result, the macular fovea delineation result and the main blood vessel. Compared with a method which can only reflect the eye fundus image level, an eye fundus image classification method based on the image level or a focus characteristic extraction method only through deep learning can reduce focus detection errors by directly obtaining the positions, types and numbers of red and bright color focuses, and the focus feature detection specificity is improved.
Owner:FUZHOU YIYING HEALTH TECH CO LTD

Near-eye foveal display

An apparatus and system for a display screen for use in near-eye display devices. Small light emitting devices are placed behind a plurality of light-directing beads. The light emitting devices and light-directing beads for a display device and system placed in front of a user for near-eye display. This allows a user to experience near-eye display with greater resolution, wider field of view and faster frame rate. Other embodiments are described herein.
Owner:SOLIDDD

Predictive, foveated virtual reality system

A predictive, foveated virtual reality system may capture views of the world around a user using multiple resolutions. The system may include one or more cameras configured to capture lower resolutionimage data for a peripheral field of view while capturing higher resolution image data for a narrow field of view corresponding to a user's line of sight. Additionally, the system may also include one or more sensors or other mechanisms, such as gaze tracking modules or accelerometers, to detect or track motion. The system may also predict, based on a user's head and eye motion, the user's futureline of sight and may capture image data corresponding to a predicted line of sight. When the user subsequently looks in that direction the system may display the previously captured (and augmented)view.
Owner:APPLE INC

Optimized deferred lighting and foveal adaptation of particles and simulation models in a foveated rendering system

A method for implementing a graphics pipeline is provided. The method includes determining a plurality of light sources affecting a virtual scene. Geometries of objects of an image of the scene is projected onto a plurality of pixels of a display from a first point-of-view. The pixels are partitioned into a plurality of tiles. A foveal region of highest resolution is defined for the image as displayed, wherein a first subset of pixels is assigned to the foveal region, and wherein a second subset of pixels is assigned to a peripheral region that is outside of the foveal region. A first set of light sources is determined from the plurality of light sources that affect one or more objects displayed in a first tile that is in the peripheral region. At least two light sources from the first setare clustered into a first aggregated light source affecting the first tile when rendering the image in pixels of the first tile.
Owner:SONY COMPUTER ENTERTAINMENT INC

Method for treating stage 1 macular hole without vitectomy and the instrument for realisation thereof

The invention relates to ophthalmology, in particular to the surgical treatment technique of macular holes at the early stages without vitrectomy. The method for treating stage 1 macular hole without vitrectomy comprises peeling the posterior hyaloid membrane away from the foveola, wherein an ophthalmological instrument is inserted through the vitreous body until it comes into contact with the posterior hyaloid membrane in the macular area, the posterior hyaloid membrane then being gripped by said instrument and peeled away from the foveola, in accordance with the invention, and after the contact between the instrument and the posterior hyaloid membrane an opening is made therein, whereby the edge of the opening is then used to lift the posterior hyaloid membrane and peel it away from the foveola until the layers are separated; wherein the instrument used is an ophthalmological membrane spatula comprising a handle 1 and a pointed working part 2 with a tip 3 shaped as a hook. The improved grip of the posterior hyaloid membrane, better visual control and maintaining the hold of said membrane continuously through the manipulations until the peeling from the foveola is complete, made it possible to reduce the trauma associated with surgical management of stage 1 macular hole without vitrectomy and to decrease the number of related complications.
Owner:BAYBORODOV YAROSLAV VLADIMIROVICH

Method of compressing image data for network transport

A method for improved compression and filtering of images for foveated transport applications. The improvements including calculating along at least one axis of the full-resolution image data set, the distance from the foveal point to edges of full-resolution image data set, calculating the distance from each edge of the full resolution data set to the closest point on a foveal region surrounding the foveal point, calculating the distribution of available space in the adjacent peripheral regions of the image using a compression parameter, and calculating a compression curve wherein the compression of both adjacent peripheral regions is such that neither side of the adjacent peripheral regions are compressed more than the other.
Owner:TOBII TECH AB
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