4149 results about "Visual angle" patented technology

A method and system for imaging an artery contained in an arterial tree. A microprocessor generates a three-dimensional reconstruction of the arterial tree from two or more angiographic images obtained from different perspectives. The orientation of the axis of the artery in the arterial tree is then determined, and a perspective of the artery perpendicular to the axis of the artery is determined. A three dimensional reconstruction of the artery from angiographic images obtained from the determined perspective is then generated.

The invention discloses a method for forming a panoramic video based on multi-view video streaming, which comprises the following steps: 1) using a plurality of cameras to capture video with an omnidirectional coverage at different viewing angles; 2) establishing one-to-one correspondence of synchronous frames in each video streaming; 3) correcting each video streaming independently by the camera's calibration; 4) panoramically joining a group of the synchronous video frames and calculating the joint parameter of each frame; 5) applying the jointed parameter to the joint of each frame in each video streaming to obtain a panoramic video formed by the panoramic frames. Compared with the prior method that uses a concave lens or a convex lens to focus lights and then reduce into a panoramic video, the invention has the advantages of low cost, no picture distortion, and suitability for the shooting during movement.

Methods and systems for providing multiple perspectives of a venue activity to electronic hand held devices are disclosed. A system for providing venue-based data to venue-based wireless hand held device can include at least one processor for processing data captured by at least one venue-based video camera for transmission to remote wireless hand held devices and at least one transmitter for wirelessly transmitting the data to a the remote wireless hand held devices. Wireless hand held devices include a display screen for displaying received venue video data. A method for transmitting venue-based data to hand held devices includes steps of capturing video images from at least one perspective of a venue-based activity using at least one video camera, processing the video images into venue-based data formatted for transmission and use by at least one hand held device and transmitting the venue-based data to at least one hand held device. Hand held devices receive venue-based data, process the data for display on a display screen associated with hand held devices, and display processed data on the display screen, thereby enabling users of the hand held devices to view at least one perspective of venue-based data through the hand held devices.

The present invention relates to spacers that are configured to promote fusion. Windows or openings in the sidewalls of the fusion spacers may be provided to allow a physician to view the treated area to confirm that fusion has occurred or to check on the progress of treatment. Fusion spacers of the invention may have two or more pairs of openings or windows that allow viewing of the treated area from different perspectives.

A head-mounted camera of the present invention includes the following elements. A first image pickup device includes a first photographing optical system that can change the focal distance and a CCD for converting a subject image formed by the first photographing optical system into an image signal. A see-through image display portion displays a photographic frame indicating the photographic range as a virtual image so that it is superimposed on a subject substantially directly observed by a photographer. A remote controller includes a second operation switch for setting the visual angle of the photographic frame when viewed from the photographer. A controller/recorder includes a first CPU for setting the focal distance of the first photographing optical system so that the visual angle of the photographic frame set by the second operation switch coincides with the field angle of the first image pickup device.

The invention belongs to the technical field of video monitoring and in particular relates to a human-computer interaction device and a human-computer interaction method adopting human-eye tracking in the video monitoring. The device comprises a non-invasive facial eye image video acquisition unit, a monitoring screen, an eye tracking image processing module and a human-computer interaction interface control module, wherein the monitoring screen is provided with infrared reference light sources around; and the eye tracking image processing module separates out binocular sub-images of a left eye and a right eye from a captured facial image, identifies the two sub-images respectively and estimates the position of a human eye staring position corresponding to the monitoring screen. The invention also provides an efficient human-computer interaction way according to eye tracking characteristics. The unified human-computer interaction way disclosed by the invention can be used for selecting a function menu by using eyes, switching monitoring video contents, regulating the focus shooting vision angle of a remote monitoring camera and the like to improve the efficiency of operating videomonitoring equipment and a video monitoring system.

Provided herein is a method for use in medical applications that permits (1) affordable three-dimensional imaging of blood flow using a low-profile easily-attached transducer pad, (2) real-time blood-flow vector velocity, and (3) long-term unattended Doppler-ultrasound monitoring in spite of motion of the patient or pad. The pad and associated processor collects and Doppler processes ultrasound blood velocity data in a three dimensional region through the use of a planar phased array of piezoelectric elements. The invention locks onto and tracks the points in three-dimensional space that produce the locally maximum blood velocity signals. The integrated coordinates of points acquired by the accurate tracking process is used to form a three-dimensional map of blood vessels and provide a display that can be used to select multiple points of interest for expanded data collection and for long term continuous and unattended blood flow monitoring. The three dimensional map allows for the calculation of vector velocity from measured radial Doppler.

A thinned array (greater than half-wavelength element spacing of the transducer array) is used to make a device of the present invention inexpensive and allow the pad to have a low profile (fewer connecting cables for a given spatial resolution). The full aperture is used for transmit and receive so that there is no loss of sensitivity (signal-to-noise ratio) or dynamic range. Utilizing more elements (extending the physical array) without increasing the number of active elements increases the angular field of view. A further increase is obtained by utilizing a convex non-planar surface.

Image templates are extracted from video images in real-time and stored in memory. Templates are selected on the basis of their ability to provide useful positional data and compared with regions of subsequent images to find the position giving the best match. From the position data a transform model is calculated. The transform model tracks the background motion in the current image to accurately determine the motion and attitude of the camera recording the current image. The transform model is confirmed by examining pre-defined image templates. Transform model data and camera sensor data are then used to insert images into the live video broadcast at the desired location in the correct perspective. Stored templates are periodically updated to purge those that no longer give valid or significant positional data. New templates extracted from recent images are used to replace the discarded templates.

In a three-dimensional image display apparatus provided with a shading mask with a minute aperture array in front of a color display device, the minute apertures are provided with color filters, a setting is provided so that the visual angles between the respective centers of the red-light transmitting part, green-light transmitting part, and blue-light transmitting part of the color filters become equal, in an identical parallax image pixel region, to the visual angles between the respective centers of the red, green, and blue sub-pixels of the color display device, the respective red, green, and blue sub-pixels are made so as to be always displayed in a lighted condition at a fixed area ratio, thus color reproduction wherein brightness ratio of the three primary colors in respective parallax image pixels is maintained at an appointed value is carried out.

The invention has two main embodiments, a first called column switching and blanking and a second embodiment called doubling. The first embodiment is a projector for displaying a stereoscopic image with projector using one or more digital micromirror devices positioned into a plurality of columns and rows. The projector itself includes a light source, an optical system, a video processing system and a data system for driving the micromirror devices. The data subsystem provides separate data to a plurality of column pairs of the micromirrors. The projector includes a stereoscopic control circuit having a first state of the control circuit for inputting a first eye view of the stereoscopic image and causing the micromirrors of a first column of each column pair to be in various on and off states during said first eye view of said stereoscopic image and for causing all of said micromirrors of a second column of each column pair to be in an off state during said first eye view of said stereoscopic image. A second state of the control circuit is used for inputting a second eye view of the stereoscopic image and causes the micromirrors of the second column of each column pair to be in various on and off states during the second eye view of the stereoscopic image and for causing all of the micromirrors of the first column of each column pair to be in an off state during the second eye view of said stereoscopic image. The second embodiment is a projector for displaying a stereoscopic image with the projector using one or more digital micromirror devices positioned into a plurality of columns and rows. The projector includes a light source, an optical system, a video processing system and a data system for driving said micromirror devices. The data subsystem provides separate data to a plurality of column pairs of the micromirrors. The projector includes a stereoscopic control circuit having a first state for inputting a first eye view of the stereoscopic image and causing each micromirror of each column pair to be in various but identical on and off states during said first eye view of said stereoscopic image. A second state of the control circuit for inputs a second eye view of the stereoscopic image and causes each micromirror of each column pair to be in various but identical on and off states during the second eye view of the stereoscopic image.

Movement through multi-dimensional space is simulated using a series of panoramic images which are projected or displayed in sequence. The user's direction of view, that is the selected view window, is maintained as the series of images is projected or displayed. Motion in directions other than forward or reverse is simulated by utilizing "branch" points in the sequence. Each path from a branch point simulates motion in a different direction. Branch points are generally indicated to a viewer by visual indicators called "hot spots"; however, branch points may also be hidden and activated in response to the viewer's selected direction of view. If a branch point is indicated by a visual indicator, a user can select motion in a desired direction by clicking on a "hot spot". In order to conserve storage space, the image representing each panorama can be stored in a compressed format. Only the portion of the panorama necessary to create a "view window" that is, the portion of the image displayed in response to the user's direction of view, is decompressed at view time. An index methodology is used to store the panoramic images. Use of the indexing methodology allows the images to be retrieved in both the forward and backward direction to simulate movement in either direction. Sound is provided in a special format, so that special effects can be provided based on the user's point of view and dependent upon the direction of motion selected by the user.

The invention discloses an indoor live-action navigation method and system. The method comprises the steps that a mobile terminal collects live-action images of the current position, the live-action images are matched with a first live-action image stored in an indoor live-action image database, and an initial coordinate of the current position is obtained; the position of a pedestrian is positioned and tracked in real time through a multi-source sensor fused position algorithm, and when the mobile terminal detects that the position of a user changes, a real-time position result and a walking trajectory are output; a second live-action image, closest to the indoor position result, in the indoor live-action image database is obtained according to the real-time indoor position result; the mobile terminal obtains a starting point and an ending point which are input by the user in the navigation process, a forward direction is obtained, a direction guided arrow is added on the second live-action image, and live-action navigation is conducted. By means of the indoor live-action navigation method and system, according to the position where the pedestrian is located, the live-action navigation images can be pushed automatically, the best navigation image visual angle can be judged automatically, and route guidance information such as the arrow is overlapped on the navigation images.

The present invention discloses a stereoscopic display, which is suitable for watching by an observer wearing a spectacle. The spectacle is provided with two cycle partial lenses with different polarization characteristics. The stereoscopic display comprises a flat display panel, a quarter wave plate and a nano-pattern half-wave plate. The flat display panel is provided with a plurality of pixels which are arranged in array and is suitable for displaying a partial line pattern. The quarter wave plate is arranged between the flat display panel and the spectacle. The nano-pattern half-wave plate is arranged between the flat display panel and the spectacle. The nano-pattern half-wave plate is corresponded to the part of the pixel. The present invention also provides a manufacturing method for the stereoscopic display. The nano-pattern half-wave plate of the present invention is provided with different phase delays in different areas. The quarter wave plate is used for transforming the line partial pattern to the cycle partial pattern. So the observer can see the stereoscopic display effect with low visual angle dependency. The present invention uses a single distribution direction for integrating the quarter wave plate and the nano-pattern half-wave plate, which can reduce the working complexity.

The invention discloses a method, a system and equipment for acquiring scene information through a mobile terminal. The method comprises the following steps: establishing a scene database, and binding and saving the information and attributes of scenes, wherein each scene attribute contains scene figure features, position information and shooting visual angle information; sending shot scene photographs to business processing equipment at the network side by the mobile terminal; acquiring the position information and the shooting visual angle information of the shot target scenes through interaction of the business processing equipment and the mobile terminal; acquiring scene features by the business processing equipment according to the photographs, searching the scene figure features from the scene database, searching the scenes in the geographic position range from the scene database, and matching corresponding scenes according to the search results; and sending the information of the matched scenes to the mobile terminal by the business processing equipment. The invention improves the accuracy and the speed for recognizing scene information, and can provide excellent real-time scene information services for users.

A liquid crystal display apparatus has a pair of substrates opposing to each other and a liquid crystals sandwiched between the pair of substrates. One side of substrate is provided with gate lines and signal lines which approximately cross each other. TFTs are provided close to intersection portion of the gate line and the signal line. Pixel electrodes and common electrodes are provided at each pixel enclosed by the gate line and the signal line. Each of pixel electrodes and common electrodes has bent points more than one and is alternately formed in parallel with each other. Both the pixel electrode and the common electrode are made up of bent sections and projected sections projecting toward concave sections of opposite electrodes from convex side top sections of the bent sections. In the liquid crystal display apparatus, improvement of visual angle characteristics and response characteristics is planned in such a way that the projected section allows electric field close to the bent section to be stabilized, and allows electric field strength to be enhanced.

The invention discloses a display screen visual angle regulating method and a television. The method comprises the following steps: firstly, utilizing a camera module to obtain a two-dimensional image and depth information of a part in front of the display screen, and transmitting the two-dimensional image and depth information to a microprocessor module; utilizing the microprocessor module to extract a face information from the received two-dimensional image, and locating the central positions of pupils; and then working out an adjusting angle and / or an up-down displacement of the display screen according to the central positions of the pupils and the central position of the display screen, and driving the display screen to carry out the visual angle adjustment through a driving module. By the implementation of the display screen visual angle adjusting technology in the invention, the display device can automatically track user position so that the visual angle of the screen does not need to be regulated manually when a user uses the display device, thus the automatic regulation of the display screen visual angle is truly realized; and the visual angle regulation precision is improved, the user can watch a video program at the best visual angle from any position in the same room, and the visual experience of the user is greatly improved.

The invention discloses a visual angle regulator for flat televisions and displays, which comprises an elevator, a horizontal rotation regulator and a screen pitching-angle regulator. The visual angleof the flat televisions and the displays can be conveniently regulated through the elevator, the horizontal rotation regulator and the screen pitching-angle regulator, wherein the regulation comprises the regulation of the parameters such as the horizontal height, the horizontal rotation, the pitching angle and the like of a screen. The visual angle regulator has perfect functions and can be regulated to the best visual angle for appreciation as required.

A technology of determining obstacles around a vehicle through utilizing bird's-eye-view images; wherein, a plurality of image fetching devices disposed in various positions of said vehicle fetch a plurality of images around said vehicle, said images of two adjacent regions contain at least an overlapped region; an image processor transforms said images into said respective independent bird's-eye-view images; and an obstacle detection unit compares said overlapped region in said independent bird's-eye-view images of two adjacent regions, so as to obtain their correlations, and existence of said obstacle is determined based on said correlations. Moreover, a correspondence table is set up containing a set of space transformation information based on vehicle driving condition information. Therefore, a surrounding bird's-eye-view image of an appropriate visual angle can be produced quickly and a position of said obstacle is marked on said surrounding bird's-eye-view image.

A method of detecting breast masses and calcifications in digitized images, includes providing a plurality of 2-dimensional (2D) digital X-ray projectional breast images acquired from different viewing angles, extracting candidate lesions and 2D features from said 2D projectional images, computing spicularity characteristics of said candidate lesions, including location, periodicity, and amplitude, applying learning algorithms to said candidate lesions to predict a probability of malignancy of said lesion, receiving from said learning algorithm a probability map of detections for each breast image, said detections comprising associating pixels with a probability of being associated with a malignancy, creating a synthetic 2D slice for each X-ray image wherein malignant regions are indicated by ellipses on a non-malignant background, and constructing a synthetic 3-dimensional (3D) image volume from said 2D synthetic slices.