80 results about "Right visual field" patented technology

In a method for testing the visual field of a patient especially the central visual field, stereoscopic or binocularly displaced fixation images are presented under computer control to the respective eyes of the patient. In addition, a series of test images viewable by only one of the patient's eyes is generated under the control of the computer. The fixation images, one for each eye, are presented on two separate electronic displays, while the test images may be produced on a third display member different from the electronic displays. The computer is programmed to precisely determine a boundary between points corresponding to unseen test images and points corresponding to seen test images, by automatically testing additional points in a region located about the curve and between points corresponding to unseen test images and points corresponding to seen test images.

A device and method are provided for treating the visual system of a human including the retina, visual cortex and/or other neuro-cellular structures. The method includes the steps of locating and defining a blind zone of deteriorated vision within the human's visual system, defining a treatment area which is located predominantly within the blind zone, and treating the human's visual system by presenting visual stimuli to the human's visual system. The majority of the visual stimuli are presented to at least a portion of the blind zone.

A game apparatus includes a CPU, and displays on a monitor a scene viewed from a virtual camera moving in a virtual game space. In the game apparatus, an aspect ratio of an image to be displayed on the monitor is acquired, and a moving speed of the virtual camera is set based on the aspect ratio. For example, a visual field of the virtual camera is set based on the aspect ratio, and as the image is laterally longer with respect to a longitudinal thereof, the visual field in a crosswise direction is made wider, and therefore a crosswise moving speed of the virtual camera is made smaller.

A visual field calculation apparatus capable of accurately calculating a visual field range of a user without using a complex configuration is provided. The visual field calculation apparatus includes a saccade detector that detects a saccade on the basis of a first gaze direction detected at a first timing and a second gaze direction detected at a second timing, a saccade speed calculator that calculates speed of the saccade on the basis of a time difference between the first timing and the second timing, the first gaze direction, and the second gaze direction, and a visual field range calculator that calculates a displacement vector of a saccade whose speed exceeds a first threshold, and calculates an area including a final point of the displacement vector as the visual field range of the user.

An automated unaided virtual perimetry system and underlying method for relative-threshold contrast sensitivity interrogation of the visual field via algorithmic presentation of visual stimuli on a screen and subsequent analysis of test response data for the detection of pathophysiologic scotomas as well response time registration and analysis for visual motor reflex testing. Launch of system via access from a remote server or direct installation of systems technology allows seamless capability at the local computer system to instruct, administer, and analyze output of stimuli and input of responses of test subjects or subjects independent of external input or control. Specific algorithmic test environment is designed to achieve comparable clinical efficacy and diagnostic utility to office-based perimetry system.

An endoscope includes a treatment tool, a right eye image capturing unit, and a left eye image capturing unit. The right eye image capturing unit and the left eye image capturing unit capture images which are to be displayed as a stereoscopic image of an image capturing target. The maximum convergence angle of arbitrary point in movable range of the treatment tool which exists in both visual fields of the right eye image capturing unit and the left eye image capturing unit is 30 degrees or less.

The invention discloses a head mounted type display device based on holographic waveguide. The head mounted type display device comprises inlet coupling grating (1), left visual field deflection grating (2), right visual field deflection grating (3), outlet coupling grating (4), and rectangular waveguide (5). The inlet coupling grating (1), the left visual field deflection grating (2), the right visual field deflection grating (3), and the outlet coupling grating (4) are attached to the upper surface or the lower surface of the rectangular waveguide (5). Whether the inlet coupling grating (1), the left visual field deflection grating (2), the right visual field deflection grating (3), the outlet coupling grating (4), and the rectangular waveguide (5) are attached to the upper surface or the lower surface is determined by an exit entrance pupil light design direction. By adopting a pupil remodeling way, a visual field separation problem of a conventional two-dimensional pupil dilation way under a large visual field angle condition is solved.

The invention discloses a high-visual angle resolution 360-degree visual field three-dimensional displaying device. The device comprises an LED (light-emitting diode) light source, an illumination optical system, a space optical modulator, a projection optical system, a combined directional scattering screen, a rotating device, an image storage control module, a rotation detecting module and a light source pulse driving control module. The invention also discloses a method for realizing high-visual angle resolution 360-degree visual field three-dimensional displaying. The LED light source is matched with the rotation of the combined directional scattering screen in a pulse illuminating way through the light source pulse driving control module, high-density visual angle scanning is realized by using minimal deviation of the scattering direction of each directional scattering sub-screen, 360-degree visual field three-dimensional displaying with high visual angle resolution is realized, the quality of a three-dimensional display image is improved, and the habit of nature observation of human eyes is better satisfied.

The invention discloses a mutative scale-based high-precision optical three-dimensional measurement method. According to the method of the invention, a binocular vision measurement system is firstly built; through switching focal lengths under different visual field scales, two times or more times of scanning under different scales can be carried out in an area with enough overlapped feature points; point cloud data under a large visual field serve as the basis, after local point cloud data are acquired through scanning in a small visual field, splicing of data of two point clouds is carried out, and thus, three-dimensional point cloud rebuilding on the overall object including local detailed parts can be completed. Compared with the scanning method under other single scale, the method of the invention has the advantages that the scanning precision is higher; after the visual field scale is changed, a system calibration process is simple, no special calibration object is needed, the calibration result precision is high, and the matching and splicing result is stable and reliable in a condition with enough sharing feature points, and the method can be widely applied to a visual measurement occasion with high precision requirements.

A 3-dimensional displaying apparatus includes an image displaying panel having a plurality of pixels and a backlight panel spaced apart from one surface of the image displaying panel. The backlight panel includes a first line source set having a plurality of line sources arranged at regular intervals and a second line source set having line sources arranged spaced apart from the respective line sources of the first line source set by a predetermined interval. The first line source set and the second line source set are driven alternately. Thus, in a case where a horizontal location of an observer varies, the change of brightness of image information and the crosstalk between adjacent visual fields are minimized, and pseudo-stereoscopic vision is prevented. Also, the irregularity of brightness distribution in a visual field may be solved

The present invention discloses a target relay tracking algorithm based on intelligent street lamp partners. According to the present invention, a target is detected by utilizing a deep network model, and secondly, the features of the target are extracted by utilizing another one deep model. An intelligent street lamp partner can snapshot the images of a plurality of visual angles of an object, and save the features extracted at each visual angle. A system detects the target at set intervals, and fuses a detection result and a tracking result. When the object moves out from the visual field of the current intelligent street lamp partner and enters in the visual field of the next intelligent street lamp partner, the next intelligent street lamp partner similarly detects the target and extracts the features, and the extracted features are compared with the features saved by the last intelligent street lamp partner, so that whether the detected objects are the same object can be determined, and the target relay tracking is realized.

A rim portion or the like functioning as a boundary portion is arranged in a position corresponding to an interpupillary distance of an observer. Therefore, it is possible to cause a non-observer looking at the observer wearing a virtual image display apparatus from the outside to recognize that an outer frame portion is present in an appropriate position in terms of an eyeglass shape. It is possible to reduce a sense of discomfort given to the non-observer. Since the boundary portion is present in an appropriate position in terms of an eyeglass shape, a visual field same as a visual field obtained when the eyeglasses are worn is secured. Therefore, it is possible to sufficiently secure a visual field range for the observer in see-through.

The invention discloses a multiresolution large visual field angle high precision photogrammetry apparatus, which comprises: a dimensional visual sense system that at least comprises two large visual field cameras, wherein, an intersection of visual fields covers a detected area, and the two large visual field cameras are used for measuring low precision three dimensional positions of targets of the detected object in the detected area; multiple small visual field cameras, wherein, union of the visual fields covers the detected area, small visual field cameras are used for imaging the detected object; a data processing part, which connects to a three-dimensional visual sense system and multiple small visual field cameras, is used for determining which visual field of the small visual field cameras the detected object is located in, according to the low precision three dimensional positions of the detected object measured by the dimensional visual sense system, further determining a high precision three dimensional position of the detected object according to image positions of the detected object in these small visual field cameras.

The invention relates to test-retest variability in tests of visual fields, and methods and systems useful in reducing this variability. The various methods and systems of the invention use gaze-direction data to improve the estimate of scotoma edges and to otherwise adjust for test-retest variability in perimetry. This may be useful in assessing progression of a patient's condition, such as glaucoma

The invention discloses a method for automatically adjusting a visual field of a rearview mirror. The method comprises the steps that a biological parameter of a driver is acquired in real time after a door opening signal is detected; whether the information of the driver is stored or not is determined, if the information of the driver is stored, the corresponding adjustment parameter is obtained, and the rearview mirror is adjusted according to the adjustment parameter; if the information of the driver is not stored, a general model is invoked according to the biological parameter to obtain the pre-adjustment parameter of the driver, and the rearview mirror is adjusted according to the pre-adjustment parameter; the sitting posture data after the driver sits in the driving position is obtained, the precise adjustment parameter is generated according to the sitting posture data according to a first predetermined rule, and the rearview mirror is adjusted according to the precise adjustment parameter; and during the vehicle travelling process, the rearview mirror is dynamically adjusted according to at least one of second preset rules according to at least one trigger condition. According to the method for automatically adjusting the visual field, the rearview mirror can be quickly and intelligently adjusted, and the driving safety is improved.

The invention discloses a large visual field non-diffracting Bessel light sheet microscopic scanning imaging method and system. The method comprises following steps: generating two collimated Gauss laser beams with same intensity by a laser source; converting two Gauss laser beams into two Bessel beams by a Bessel light generating element respectively; aligning two Bessel beams, projecting the Bessel beams on two sides of a scanned sample to excite the sample to generate fluorescence; collecting the fluorescence by a detector with an electron slit, using the fluorescence to carry out exposureimaging to obtain the image of the sample, and adopting a detection object lens with a low value aperture to carry out large visual field imaging by the detector. Two Bessel beams are used to enhancethe transmission depth in a same visual field, the position of the electron slit is opposite to the center of two Bessel beams, under a condition of large depth of field, the side lobe effect is eliminated, and the depth of the electron slit is matched with the diameter of the center of two Bessel beams. The provided method and system can realize large visual filed and large depth of field imagingand improves the imaging quality of sample images.

A three-dimensional (3D) graphics clipping method, a 3D graphics displaying method, and a 3D graphics processing apparatus using the same are provided. The 3D graphics clipping method includes following steps. A plurality of vertexes of a triangle is obtained, wherein a 3D object is constructed by using a plane of the triangle. Whether a view point is located between a first near clipping plane and a far clipping plane is determined. A second near clipping plane is set according to the determination result, and a view field is set between the second near clipping plane and the far clipping plane. A near clipping procedure is executed on the triangle according to the second near clipping plane. In the 3D graphics clipping method, a correct view field is determined in advance so that a graphics processing procedure is efficiently sped up and the accuracy of the near clipping procedure is increased.

The invention discloses a method and a device for adjusting and controlling the visual field of a PT camera. The method can provide the direct perception of the camera pointing direction to an operator, the direct direction perception is also provided through the panoramic picture, and the PT camera can be quickly positioned in any orientation. The method and the device realize a high efficient man-machine interaction mode, the operator faces to the global view image and directly operates during the positioning process, the visual field can be adjusted, and the operator can conveniently realize the WYSIWYG operating and controlling effect and can well realize the accurate and quick PT positioning in PT camera visual field under the circumstance that the operator is unfamiliar with the mounting position and the control method of the camera.

The invention relates to a method for designing a plane control cabinet windshield specific to a visual field in order to solve the problems in the prior art. In the invention, the two-dimensional design is required to be three-dimensional and visualized. In addition, the invention also provides a novel technology for generating a coverage chart, wherein an accurate control cabin coverage chart is generated by using an accurate topological deformation technology.

A virtual reality system can perform a visual field test for detecting an ocular disorder. The system can include a display unit and a virtual reality headset. The virtual reality headset can be in wireless communication with the display unit. The virtual reality headset can include a display screen configured to present a test scene to a patient to thereby detect the ocular disorder.