1173 results about "Visual range" patented technology

The presently disclosed invention is a device for measuring horizontal and vertical eye movement. The device is adaptable to utilize multiple measurement technologies (e.g., direct infrared, electro-oculography, ultrasound, or video), and is capable of measuring each eye individually or both eyes jointly. The present invention overcomes the shortcomings of the prior art by requiring minimal adjustment for accurate measurement, only minimally obstructing the user's visual range (i.e., slightly more than the user's own nose), being made of low cost and readily available material, and by being comprised of a comfortable and efficient design of an adjustable nose and forehead piece with an adjustable head strap. An additional advancement over the prior art is that the presently disclosed device does not require an aperture or frame, as did the prior art, or any additional optics such as, lenses, mirrors, or prisms. The device rests on the user's nose with the sensors located near the nasal area of the eye(s) utilizing a nose bridge component to house the measuring technology. The forehead piece and head strap provide for ease of alignment, added stability, and a wide range of test applications. The greater field of vision provided by this device allows for a wide range of test applications.

The invention relates to an on-board intelligent alarming method and a device, wherein, the method combines a longitudinal anti-collision pre-warning method based on the single-eye vision and an accident automatic help-calling method, realizes preventing the rear-end accidents, strives for helping time, reduces injuries and deaths, effectively prevents the collision accidents and personnel deaths caused by the collision, and improves the running safety of the automobile; the device mainly comprises three parts: an on-board terminal, a monitoring center and a user end; the method and the device use the machine vision technique to differentiate the moving vehicles in the front, have high precision and wide visible range, can effectively probe the obstacles, reduce the error reporting possibility and prevent the collision accidents. The method and the device can improve the safety of the vehicle, thus having extremely large application value and prospect.

A device for determining a reproduction position of a source of sound for audio-visual reproduction of a film scene from a plurality of individual pictures with regard to a reproduction surface having a predetermined width and a projection source having a projection reference point comprises means for providing a recording position of the source of sound, a camera position during recording, and an aperture angle of the camera during recording. In addition, provision is made of means for transforming the recording position of the source of sound to a camera coordinate system, the origin of which is defined, in relation to a camera aperture, to obtain a recording position of the source of sound in the camera coordinate system. Means for calculating the reproduction position of the source of sound in relation to the projection reference point determines whether the aperture angle of the camera equals a predetermined aperture angle, and whether or not a source of sound is located within the visual range of the camera. If the current aperture angle of the camera differs from the predetermined standard aperture angle, the reproduction position of the source of sound is spaced toward a viewer, or away from the viewer, by a distance which depends on the ratio of the standard aperture angle to the current aperture angle. Hereby, automatable sound-source positioning is achieved so as to provide not only a visually realistic, but also an acoustically realistic situation in a reproduction room using wave-field synthesis methods.

The invention relates to a miniature unmanned helicopter auto flight control system which comprises an on-board control system, wherein, an on-board computer gets signals from sensors through a serial port, and exchanges data with a ground-based computer through on-board and ground wireless Ethernet access points; the on-board computer carries out serial communication with a digital signal processor to control a steering engine set of the unmanned helicopter; a remote control signal receiver outputs to the digital signal processor and then is connected with the on-board computer through a serial port, and an auto control signal and a ground remote control signal are accumulated to get a current steering engine control signal. And the auto flight control system also comprises a ground control system, wherein, the ground-based computer transmits flight control instructions to the on-board computer and receives and records flight data; through operating a ground helicopter remote controller, manual control instructions can be transmitted to the on-board remote control signal receiver via wireless radio frequency signals. The invention can improve the auto flight ability of the miniature unmanned helicopter, strengthen system reliability, expand the application range of the unmanned helicopter and enable the helicopter to complete given missions beyond the visual range.

The invention provides an image-based visibility measurement solution in which an image is used to calculate a visibility (visual range). In one embodiment, a lighting condition for the image is determined and the visibility calculation is adjusted based on the lighting condition. Further, the invention can obtain image data for a set of portions of the image and estimate a visual range based on each portion. The estimated visual ranges can be combined to calculate the visibility for the image. Still further, multiple metrics can be calculated, each of which is used to estimate a visual range. Subsequently, the visual ranges can be used to calculate the visibility for the image. Even further, configuration data that is based on a set of training images can be used to calculate the visibility for a new image. To this extent, the invention can incorporate the lighting condition, portions of the image having differing features, multiple metrics, and / or feedback through training images to accurately measure visibility based on an image.

The invention discloses a mechanical arm system based on stereo visual serving and a calibrating method thereof; the mechanical arm system comprises a mechanical arm, visual equipment and main control equipment, wherein a vision marker is mounted at the tail end of the mechanical arm; the vision marker is positioned within a vision range of the visual equipment; the visual equipment and the mechanical arm are independently mounted and used for obtaining images of a target object and the vision marker so as to identify and position the posture of the vision marker relative to the target object; and the main control equipment is used for figuring out the angle of each joint of the mechanical arm according to an image of the vision marker, so as to control the mechanical arm to operate the target object. According to the invention, the mechanical arm can be corrected when the joints on the mechanical arm have gaps between each other, so that accurate operation tasks can be finished by using the mechanical arm system.

A visible wavelength range proximity sensor includes a visible light emitter with a peak wavelength in a visible wavelength range, and a plasmonic ambient light sensor, where a proximity sensing mode and an ambient light sensing mode are time multiplexed.

The invention discloses a flight control method of a small unmanned helicopter. According to the method, a flight execution unit, a state sensor unit, a parachute unit, a flight control unit, a ground control terminal and a remote controller unit are adopted, so that the effects of obstacle-avoidance flight, water-surface-avoidance landing, self-adaptive flight attitude control, power monitoring, automatic parachute opening in case of engine stop, flight control through a flight control panel, flight path generation through a signal panel and the like can be achieved. The flight control method of the small unmanned helicopter has the advantages that the self-adaptive obstacle-avoidance flight capacity of the small unmanned helicopter can be improved; the small unmanned helicopter can operate in a beyond visual range according to a preset instruction, can slowly land by using a parachute in an emergency of the engine stop in the air, is protected from being damaged, and can automatically avoid a water surface during landing.

A gate inhibition and work attendance device based on face discrimination technique are disclosed those include: cam used to read the face images, embedded system used to transmit the video information, input device used to input the identification information and computer used to distinguish the images and manage the work attendance. Said cam is connected with the embedded system, said embedded system is connected with the input device, and said embedded system is connected with the computer data. The gate inhibition and work attendance device also include mirror face used to confirm the side position of face, the cam is mounted on the top of mirror face, the optimal visual range of the cam is matched with the mirror face; said computer includes: image acquisition module, face image library, face detecting position module, image preprocessing module, face exercising module and face discrimination module. The invention provides the gate inhibition and work attendance device based on face discrimination technique with characterized that high discrimination success rate, easy to realize, high-speed to discriminate and judge, convenient to install and low implement cost.

An optical sight system that comprises a combination of a thermal scope with a CCD visual-range attachment connectable to the thermal scope with a quick-release connector. The system is equipped with a device that automatically activates the CCD visual-range attachment when the latter is connected to the thermal scope and with a comparator that compares the video signal of the CCD attachment with the video signal of the thermal scope for sending the brightest video signal to the thermal scope display.

A head-up display device includes a light source, a display unit for producing display virtual images including an alarm display image, a mirror for reflecting the light to show the alarm display image in a field of front view of a driver, at least one on-vehicle device that the driver operates, a visual-line shift detecting means and a display position shifting means. The mirror reflects the light representing the alarm display image so that a driver can see the alarm display image in a display area that is set on one of a front windshield and a combiner in front of the driver and in a field of front vision of the driver. The visual-line shift detecting means detects a visual line shift of the driver from a usual forward visual range of the driver toward the on-vehicle device that the driver operates. The display position shifting means shifts positions of the display area to a position between the usual forward visual range and a portion / part, of the on-vehicle device at operation, which the driver watches during the operation when the visual-line shift detecting means detects the visual line shift from the usual forward visual range toward the on-vehicle device.

The invention provides an optical tag, method and apparatus for identifying the optical tag. The optical tag comprises N light-emitting sources; the change modes of light emitted by the N light-emitting sources in a period represent the code information of the N light-emitting sources, wherein the code information contains synchronization information and unique identification information, wherein the synchronization information is used for locating the unique identification information, and the unique identification information specifies an item bound with the optical tag. The optical tag provided by the invention can be fast identified remotely by personal equipment provided with an image pick-up device, the identification distance of the optical tag can be the visual range of a user, and therefore, the identification distance of an existing RFID tag and an existing two-dimensional code tag can be greatly improved. The personal equipment can identify an optical tag in a video in network transmission.

A dynamic range expanding apparatus in an image processing system, capable of more stably expanding dynamic visual range by removing motion blurring caused when images each having different exposure levels are combined, and a dynamic range expanding method, are provided. In this apparatus, a video multiplexing unit divides a digital video signal, which is converted from an analog video signal output by a charged coupled device, into an over-exposed video signal and an under-exposed video signal having different exposure levels. A motion correction unit corrects the moving part of an excessively-exposed video according to the amount of movement of an image acquired by the charged coupled device, using the output of the video multiplexing unit. A video output unit interpolates a dark part of a resultant signal corrected by the motion correction unit and a bright part of the under-exposed video signal using a luminance weight produced from the under-exposed video signal, and outputs the interpolated result as an expanded video signal having an expanded dynamic range.

The invention relates to a non-overlapping visual field multiple-camera human body target tracking method, in particular to a method for carrying out target matching and tracking in multi-camera videos of a non-overlapping visual field under the condition of known topological relation among multiple cameras, comprising the following steps: firstly, establishing a topological relation matrix among multiple cameras, then extracting a foreground image of a pedestrian target followed by selecting a tracking target in the visual range of a certain camera by a human-machine interaction interface, using a mixed Gaussian model to extract the appearance characteristics of the target, comprising colour histogram characteristic and UV colour characteristic, in the whole tracking process, adopting a tree structure to manage tracking task, using Bayesian model to estimate overall similarity, and searching for the optimal matching target according to the overall similarity. The invention has the advantages of high precision, simple algorithm, easy realization, strong instantaneity and the like, and can provide a new real-time and reliable method for multi-camera target recognition and tracking.

The invention discloses an image-brightness-characteristic-based pan / tilt / zoom (PTZ) video visibility detection method, which comprises the following steps of: acquiring a road condition video image by using a PTZ video camera, extracting a region of interest (ROI) of the road surface, and acquiring high consistency of the selected pixels; obtaining an accurate road surface region by utilizing a Nagao-filtering-based regional growth algorithm, and ensuring consistent illumination of the selected pixels in a world coordinate; in the road surface region, extracting a contrast curve reflecting the road surface brightness change, searching brightness curve characteristic points, and calculating the farthest pixel which can be identified by human eyes in the image through an extinction coefficient; and combining the camera to calibrate and convert the maximum visual range, and determining a visibility value. In the method, artificial markers are not needed to be set, the existing PTZ camera is fully utilized to shoot road condition and acquire images, can monitor the road condition in real time, and is low in monitoring cost; moreover, the requirement on large-area road condition monitoring is met, the monitoring is stable and is not interfered by external environment, and the visibility monitoring method is easy to implement, high in accuracy and good in effect.

The invention provides an information display system capable of automatically adjusting the visual range and a display method of the information display system. After a sensing module is used for capturing the information of a driver and detecting the distance between the sensing module and the driver, the face feature information comprising the positions of the eyes, the face deflection angle, the drive watching position and the like of the driver is further identified to estimate the projection range, namely the position of the visual range of the driver, of the driving information on a front windshield, the position and the angle of a projection device are adjusted according to the projection range, and therefore the projection device can project a picture at the accurate position of the front windshield.

When apparatuses controllable via a network exist inside and outside a user's visual range, a user remotely controls at least one of the apparatuses via the network using a predetermined control point in a remote control system. The remote control system includes the following: a mechanism that causes the control point to transmit a command for specifying an apparatus to be controlled via the network to an apparatus to be specified in accordance with a user's apparatus specifying operation; and a mechanism that causes the apparatus that has received the command for specifying an apparatus to be controlled to transmit a response via the network to the control point as well as to perform an operation using a device attached to the body of the apparatus in response to the command.

The invention discloses a display processing method of a screen of a wearable device, and the wearable device. The method comprises the following steps: determining a position of a display region of the screen according to an operation mode of a user for viewing the current content displayed by the screen, wherein the display region is partial region of the screen, and the operation mode comprises one of the operation of appointing the display region and the operation of automatically recognizing the display region; lightening the display region at the position of the display region to display the current content, so that a processor of the wearable device can self-adaptively display the current content in the visual range of the user when the wearable device is rotated.

The invention relates to a biologic water quality monitoring system for perceiving fish behaviors based on vision, comprising a transparent aquarium for containing fishes, cameras for monitoring fish behaviors, video capture cards and a water quality monitoring center, wherein the aquarium is positioned in the visual ranges of the cameras; all cameras are in data communication link with the waterquality monitoring center by the video capture cards; and the water quality monitoring center comprises an image capture module, an image processing module, a target tracking module and a fish behavior data analysis module. The fish behavior data analysis module comprises a data modeling part and a data matching part, obtains data of image frame sequence of a water area to be analyzed and substitutes the data into model formals (6) and (7) for matching. If the difference between a present calculated value and a normal action value is in the range of a default threshold, the fact represents that the fish behaviors are normal and judges that water quality conditions are good. If the difference is beyond the range of the default threshold, the fact judges that the water is polluted. The biologic water quality monitoring system reduces cost, is suitable for large-scale application and has good practicality.

The invention discloses a sky wave beyond visual range radar adaptive interference suppression method based on side lobe constraint, for resolving the problems as segment adaptive processing time sea and ground clutter spectrum spread. The inventive method comprises respectively forming receiving beams pointing theta 0 for the check unit and a sample unit as main antenna, selecting a plurality of receiving antennas as auxiliary antennas, respectively processing 3-pulse MTI treatment on the data of main antenna and auxiliary antennas of the sample unit, respectively processing Doppler filter on the data of each segment of the auxiliary antennas of the check unit, and keeping zero Doppler channel output, using the data of the sample unit to calculate out the adaptive weight value of each data segment of the auxiliary antennas of the check unit, processing adaptive filter on the data of the sample unit, processing interference accumulation on the adaptively filtered data to obtain the Doppler spectrum with interference constraint. The invention has high interference constraint property and low operand, which is suitable for sky wave beyond visual range radar adaptive interference suppression.

The invention discloses a motion control system and a motion control method for a spherical robot with visual feedback. The motion control system comprises a binocular visual system, a gyroscope, a spherical robot body, an embedded-type controller and a wireless communication module. The motion control system is positioned through cooperation between a visual camera and the gyroscope and measures self motion parameter information of the robot in real time, and the self motion parameter information is used as feedback to be input into a controller. After conducting calculations, the controller issues a control order to a motor on the spherical robot so as to achieve tracking of a targeted path. Meanwhile, the controller can also monitor state information of the robot remotely and give an operation order. The motion control method sets up an inner ring control strategy by adopting a state feedback algorithm, sets up an outer ring control strategy by adopting a curvature tracking algorithm and conducts control through combining an inner ring and an outer ring. The left and right image sequence can be collected in real time through the binocular visual system. By means of adoption of a binocular visual range algorithm, postures and changes of position of the spherical robot can be figured out. By mean of the gyroscope, errors caused by an unstable platform are complemented, and obtained results are used as feedback to be brought into a control algorithm.

An apparatus to enhance driving safety for vehicles especially in the dynamic conditions at turning includes a display panel installed on an inner side of the vehicle A-pillar and a video camera installed on an outer side of the A-pillar. Vision outside the A-pillar can be dynamically captured by the video camera and displayed on the display panel. Hence the visual scope of the driver increases. A video camera array can be provided to capture the images of different angles. And an image processor is provided to process the images and display a full scope image on a full scope display panel on the inner side of the A-pillar. Thereby the driver can get a visual image equivalent to a transparent A-pillar to enhance driving safety.

The invention discloses a method for generating an interactive dynamic panoramic image, which comprises the steps of converting each frame of image in a captured video to a latitude and longitude image through latitude and longitude mapping coordinates, further suturing into the panoramic image through optical reduction, then carrying out video coding, generating a panoramic video according to the time, converting each frame of the image in the panoramic video to a spherical image of a world coordinate system, carrying out view conversion and projection transformation, then carrying out synchronous playing with the time, and generating the interactive dynamic panoramic image. The interactive dynamic panoramic image can lead a user to view the dynamic panoramic image from different viewing angles, and the images adopting the conversion through spherical coordinates can lead the image distortion to be small, lead the images to be in line with the viewing effect of human eyes and increase the visual range of the dynamic panoramic image.

The invention discloses an unmanned aerial vehicle autonomous navigation positioning method with assistance of visual information. The positioning method aims at providing accurate unmanned aerial vehicle navigation positioning information by making use of a visual sensor and corresponding visual ranging algorithm. In the method, speed and position information of the unmanned aerial vehicle are calculated through a combined visual ranging algorithm, and are used for assisting inertial navigation positioning. When a GNSS (Global Navigation Satellite System) signal is available, inertial navigation system error is corrected through inertial navigation / GNSS combined navigation, and a visual ranging evaluation criterion is established; when the GNSS signal is unavailable, the visual ranging evaluation criterion is used for evaluating the visual ranging result obtained by the combined visual ranging algorithm, error of a inertial navigation system is estimated and compensated with the visual ranging result and the visual ranging evaluation result, and thus, continuous and reliable navigation positioning information is provided for the unmanned aerial vehicle. The method provided by the invention can continuously and steadily provide accurate navigation positioning information for an unmanned aerial vehicle control system for long time.

An electronic patient monitoring system that includes a not easily removable patient identification and monitoring device, an observer transmitter / receiver device to communicate with the not easily removable patient identification and monitoring device when within a specified visual range of each other within a predefined time interval, and a central computer system including, at least, a computer processor, communications components and system software to communicate with the observer transmitter / receiver device at specified / predetermined time intervals to receive observer- and patient-specific information.

The invention discloses a method for generating a panoramic video. The method comprises the following steps of: converting an image of each frame of a picked video into a longitude and latitude image through a latitude and longitude mapping coordinate, seaming into a panoramic image through optical clipping, and then carrying out video coding and generating the panoramic video according to time. By converting the image into the longitude and latitude image through a spherical coordinate and the latitude and longitude mapping coordinate, the invention accords with visual features of human eyes, the generated panoramic video is convenient for people to see the upward panoramic video and the panoramic video with 360 degrees of horizontal sweeping, increases the vision range of the panoramic video and accords with the vision effect of the human eyes.

A device for locating a parked vehicle has a remote mobile unit with an aerodynamic housing, including a base and a transparent lens covering an illuminating visual indicator, such as a strobe light. The base contains a battery power source, an electronic sound emitter and control circuitry, including a radio signal transceiver and a spread spectrum processor. An adhesive membrane layer on the bottom of the base facilitates quick and easy attachment to a vehicle, at a location which is easily visible from a distance (e.g. the roof or other high exterior position). A wireless handheld control unit has an internal I / O processor, pushbuttons for entering commands, a spread spectrum processor and a radio transceiver and antenna for sending and receiving spread spectrum signals to and from the transceiver in the mobile unit in order to selectively activate and deactivate the illuminating visual indicator and sound emitter. The distinct emitted sound and flash sequence and / or rhythm of the illuminating indicator can be selectively programmed and / or changed by the user with the wireless handheld unit. The sound emitter and illuminating indicator have a respective audible and visual range of at least 1,000 feet.