323 results about "Pinhole camera" patented technology

An image processing system includes a combined display-camera having an array of interspersed display elements and camera elements, arranged substantially in a common plane of a flat panel or other display. Each of at least a subset of the camera elements has one or more imaging angles associated therewith, with the one or more imaging angles being selected to provide a desired imaging operation for the combined display-camera. The imaging angles of the camera elements can be selected to provide an imaging operation which approximates that of a lens-based single-camera system, a pin-hole camera system or other type of system. Each of the camera elements may include multiple image sensors, such that different imaging angles can be set for the different image sensors of a given camera element, and different perspectives of a scene can be generated in the image processing system.

User interaction with a display is detected substantially simultaneously using at least two cameras whose intersecting FOVs define a three-dimensional hover zone within which user interactions can be imaged. Separately and collectively image data is analyzed to identify a relatively few user landmarks. A substantially unambiguous correspondence is established between the same landmark on each acquired image, and a three-dimensional reconstruction is made in a common coordinate system. Preferably cameras are modeled to have characteristics of pinhole cameras, enabling rectified epipolar geometric analysis to facilitate more rapid disambiguation among potential landmark points. Consequently processing overhead is substantially reduced, as are latency times. Landmark identification and position information is convertible into a command causing the display to respond appropriately to a user gesture. Advantageously size of the hover zone can far exceed size of the display, making the invention usable with smart phones as well as large size entertainment TVs.

The invention relates to an intelligent vehicle device and a method for preventing collision to a passerby in the technical field of vehicle automatic control, wherein the device comprises a binocular pinhole camera, a signal processor, a vehicle speed control mechanism and a sound prompting device; the method comprises the following steps of: 1. calibrating a camera parameter; 2. synthesizing a left view and a right view; 3. judging and determining the positioned region of a moving object; 4. computing a threshold value overcoming a grey-level difference; 5. measuring similarity; 6. detecting the distance between the moving object and a vehicle; 7. outputting a control instruction; and 8. repeating the cycle process from step 2 to step 7. The device and the method can be used for automatically detecting road surface conditions, and once the passerby is found, the device can immediately issue a control instruction, warn a driver to pay attention to forward road conditions and automatically enable the vehicle to decelerate and brake, thereby enhancing the automated and intellectualized technical levels of the vehicle and ensuring driving safety.

The invention relates to the technical field of navigation systems, in particular to a portable blindman independent navigation system. The portable blindman independent navigation system is a main glasses body, which comprises a glasses framework, pinhole cameras arranged on both sides of the main glasses framework, a GPS (Global Position System) arranged in the middle of the main glasses body, earphones arranged at the tail ends of the glasses framework and embedded hardware systems arranged in lenses of the main glasses body; wherein the embedded hardware systems arranged in the lenses of the main glasses body comprise extension ports, ARM (Advanced RISC Machines, RISC is short for Reduced Instruction-Set Computer) systems, videos, ARM inner cores, DSP (Digital Signal Processor) inner cores, FPGs and Linux real-time operation systems. In the portable blindman independent navigation system, the embedded systems are used for carrying out three-dimensional information extraction on binocular images acquired by the pinhole cameras, a built-in navigation map and GPS information are used for comparison to acquire relevant information of positions, directions, front barriers and the like and converting results into voice signals to inform blindmen.

A vehicle intelligent device for automatically identifying road pit or obstruction in the technical field of vehicle intelligentialization comprises a binocular pinhole camera, a signal processor, a vehicle speed control mechanism and a voice prompting device; the output interfaces of the binocular pinhole camera are respectively connected with two image input interfaces of the signal processor, and the output interface of the signal processor is connected with the input interface of the vehicle speed control mechanism and the input interface of the voice promoting device in parallel. The binocular pinhole camera transmits the road scene image analog signals respectively collected to the signal processor; the signal processor processes two images in real time, identifies whether pit or obstruction exists in front of the current vehicle, and transmits identification result to the vehicle speed control mechanism and voice promoting device by control command. Once finding out pit or obstruction in the invention, the system can send out control command right now and the vehicle is automatically decelerated, thereby ensuring driving safety; and the incidence rate of road traffic accidents such as vehicle rear-end collision and impact can be obviously reduced.

The invention relates to intelligent detection control device and method of safe interval. The device comprises a binocular pinhole camera, a signal processor, a vehicle speed control mechanism and a voice prompter. An output interface of the binocular pinhole camera is respectively connected with two image input interfaces of the signal processor through a video cable; and an output interface ofthe signal processor is connected in parallel with an input interface of the vehicle speed control mechanism and an input interface of the voice prompter. In the method, the vehicle distance from thefront vehicle is automatically detected, and the kept safe distance is accurately controlled according to the speed of the vehicle. The invention ensures that the speed is reduced in a real-way and accurate way until braking according to the current vehicle speed and the interval, thereby effectively avoiding traffic accidents such as tailgate. The counting data in the implementation result showsthat the tailgate accident can be reduced by above 95%.

The invention relates to a multifunctional antitheft box, which comprises a box body, a pull rod and four rollers; the box body is provided with a mounting seat; the pull rod passes through the mounting seat and can be telescopically arranged at one side of the box body; the four rollers are arranged on the bottom part of the box body; a positioning alarming monitoring terminal is further installed inside the box body, and the positioning alarming monitoring terminal consists of a global positioning system (GPS) positioning module, a third-generation /global system for mobile communication (3g/GSM) communication module, a 3g/GSM antenna module, a GPS antenna module and a box body control module; the mounting seat is further provided with a loudspeaker which is electrically connected with the positioning alarming monitoring terminal; and one side surface of the box body is provided with a voice microphone and a pinhole camera which are electrically connected with the positioning alarming monitoring terminal. The multifunctional antitheft box has the advantages that an alarming function, a positioning function and a signal shielding function are integrated, and the like.

The invention relates to an experiment device for testing a softening and dropping point of a sinter. The device is composed of a large current transformer, a furnace body fixing column, a tray, a furnace body adjusting frame, a rotary column, a pressurized gas cylinder, a displacement sensor, a furnace top sealing furnace cover, a pressurized graphite compression strut, an anti-radiation graphite cover, a molybdenum disilicide heater, a graphite crucible, a high pure graphite sleeve, a sealed alundum tube, a pinhole camera, an air inlet channel fixing sleeve, a dropping crucible weighing device, a dropping crucible device, a furnace body chassis, furnace body castors, a heating furnace body, a cantilever beam, a sample temperature thermocouple, a alumina hollow ball member, a furnace temperature control thermocouple, a rotary column circular sleeve, a pressurized gas cylinder pipeline and a pressure transmitter. The large current transformer is adopted to supply power for the molybdenum disilicide heater; the pinhole camera is used to observe a dropping process of high temperature liquid slag iron; the dropping crucible weighing device is arranged; the crucible is assembled and disassembled in a manner of laterally opening the door; and the position of the heating furnace body is adjusted by the furnace body adjusting frame, so that the device is flexible, accurate and convenient for operations.

The invention discloses a novel pure rotation self-calibration method based on a spherical projection model, aims at internal parameter calibration tasks of a pinhole camera, and particularly relates to a pure rotation camera self-calibration method based on the spherical projection model. A spherical projection model of the pinhole camera is constructed, and that the distance between a space stationary point and a corresponding spherical projection point is consistent during pure rotation of the camera is analyzed; a constrain equation set of internal parameters is constructed according to the property; and the equation set is solved by a nonlinear least square algorithm. Compared with prior methods, internal parameters can be obtained by using corresponding point characteristics on two images, complicated matrix numeric calculation is not needed, only four matching points on the two images can complete calibration of four internal parameters of the camera, and the method is suitable for on-line and off-line calibration. Simulation and experiment results show that the method is simple and practical, high in calibration accuracy and good in robustness for image noise and translation noise.

The invention discloses an insulator arc-over fault positioning device and a positioning method based on discharging light detection. The insulator arc-over fault positioning device comprises a micro-consumption pinhole camera, a solar battery, a storage battery, an image processing singlechip, a counting unit, a wireless transmission module, an image receiving unit and an alarm unit, wherein the micro-consumption pinhole camera is used for collecting insulator arc-over discharging light, the image processing singlechip is used for controlling the micro-consumption pinhole camera to collect parameters and analyze and judge whether arc-over discharging is incurred to an insulator according to a collecting result, the counting unit is used for counting the number of arc-over times, the wireless transmission module is used for transmitting an arc-over picture to the image receiving unit, the solar battery and the storage battery are used as power supply devices, the image receiving unit is used for receiving and storing the arc-over picture transmitted by the wireless transmission module and the alarm unit is used for transmitting an alarm signal. The insulator arc-over fault positioning device and the positioning method based on the discharging light detection have the advantages of intuitively and effectively positioning the insulator with arc-over fault, improving working efficiency of line walking personnel and shortening fault eliminating time.

The invention relates to intelligent recognition device and method for the fatigue state of a driver in the technical field of control in automobile engineering. The device comprises a pinhole camera, a signal processor, an automobile speed control mechanism and a voice player, wherein the output interface of the pinhole camera is connected with the image input interface of the signal processor through a video cable, and the output interface of the signal processor is respectively connected with the digital input interfaces of the automobile speed control mechanism and the voice player. The method comprises the following steps of: 1. learning a training sample by a system; and 2. online recognizing the fatigue state of the driver, wherein the step 1 comprises the steps of driver fatigue-state face image acquisition and color space conversion, human face central position and eye area determination, training sample characteristic value and characteristic vector computation and the like; and the step 2 comprises the steps of driver face image real-time acquisition and color space conversion, automatic determination of driver face central positions and eye areas, tracking for the driver eye areas, testing sample characteristic vector computation, driver fatigue-state recognition, vehicle control decision-making and the like. The invention ensures that the driving state of the driver can be accurately recognized in the driving process of vehicles, and the fatigue driving of the driver is prevented, so that traffic accidents caused by the fatigue of the driver can be effectively avoided.

The invention provides a technique and device for detecting the sub-aperture stitching of a large aperture plane optical element. When the technique is used to measure an optical element, basic devices include a plurality of pinhole cameras, a plane optical element, and a display. A series of sinusoidal encoded periodically changed fringe patterns are shown on the display, and are collected simultaneously by the plurality of pinhole cameras after reflection by a measured surface. To avoid the interference of the rear surface reflected light, a spectral estimation algorithm is used to calculate coordinates of the reflected light in the display plane, and a ray tracing for the reference coordinate plane for the reference method is introduced to achieve the precise reset of the reference surface and the measured surface, thus deducting a system error of a test system. Slope data obtained by the plurality of cameras are subjected to a sub-aperture stitching algorithm to obtain the slope distribution on the measured full aperture, and then integration is conducted to obtain the surface profile distribution of the large aperture plane optical element. The designed test device has the advantages of simple structure, good shock resistance and high test precision, which can provide a new idea for the online detection of large aperture plane optical elements.

The invention discloses a multifunctional self-rescuing schoolbag. The multifunctional self-rescuing schoolbag comprises a schoolbag body and shoulder straps connected with the schoolbag body. The schoolbag is characterized in that the schoolbag body is provided with gasbag modules and electronic devices. The gasbag modules comprise power sources, sensors, control units, gas generators, gasbags and clock springs. The electronic devices comprise a miniature sound recorder, a pinhole camera, an ultra-tiny GPS tracking and navigating instrument and an induction alarm. The electronic devices are arranged inside a panda-shaped pattern on the outer side of the schoolbag body. Each part of the panda-shaped pattern is provided with a micropore. The electronic devices are connected with a mobile phone of a family member through a communication network. The multifunctional self-rescuing schoolbag integrates multiple functions of rescuing, warning, navigation, sound recording, camera shooting and protection, and therefore the self-rescuing effect can be achieved under the cooperation effect of the electronic devices when a user meets with accidental emergencies such as drowning, fire disasters, trampling and offenders.

A method of determining the distance of an object from an automated vehicle based on images taken by a monocular image acquiring device. The object is recognized with an object-class by means of an image processing system. Respective position data are determined from the images using a pinhole camera model based on the object-class. Position data indicating in world coordinates the position of a reference point of the object with respect to the plane of the road is used with a scaling factor of the pinhole camera model estimated by means of a Bayes estimator using the position data as observations and under the assumption that the reference point of the object is located on the plane of the road with a predefined probability. The distance of the object from the automated vehicle is calculated from the estimated scaling factor using the pinhole camera model.

The embodiment of the invention provides a method and system for the simultaneous positioning and mapping, and a storage medium. The method comprises the steps: obtaining a big-view-field image through a big-view-field camera; projecting the big-view-field image to imaging planes of at least two virtual pin hole cameras in different directions based on a multiple virtual pin hole camera model according to the internal parameters of the big-view-field camera, so as to obtain a projection map based on each virtual pin hole camera; unfolding at least two projection maps in different directions, so as to obtain a big-view-field distortion removal image corresponding to the big-view-field image, wherein the multiple virtual pin hole camera model comprises at least two virtual pin hole cameras in different directions, and the centers of the virtual pin hole cameras are coincided with the center of the big-view-field camera; tracking the movement of the big-view-field camera based on the big-view-field distortion removal image, and building a map. Through the above scheme, the method can maintain all view fields of the big-view-field camera, and is not affected by the image distortion.

The invention relates to an intelligent bus courtesy seat prompting device and an intelligent bus courtesy seat prompting method in the technical field of control in automotive engineering. In the device, an output interface of a pinhole camera is connected with an image input interface of a signal processor through a video cable, and an output interface of the signal processor is connected with a digital input interface of a voice prompting device. The method comprises the following steps that: 1, a system learns a training sample, and acquires and processes face images of young men when in a learning state; and 2, the system enters an on-line working state, monitors passengers on courtesy seats in real time, determines to output control commands to the passengers on the courtesy seats according to an identification result, and determines whether to prompt the passengers by using the voice prompting device or not. Through the device and the method, friendly prompts are automatically provided for the passengers who grab the bus courtesy seats or negligently sit on the bus courtesy seats, so that the passengers can be aware of the wrong behaviors; therefore, the functions of the bus courtesy seats can be exerted; and the identification accuracy is over 98 percent.

The invention discloses a pinhole camera detecting method based on binocular detection, which is characterized in that pinhole cameras hidden in a room can be effectively detect and its accurate position can be determined; based on the feature of the cat-eye effect of the pinhole cameras that the reflected light is returned along the original path and the scattering angle is quite small, and by means of an invisible laser beam, suspicious areas in a room with possible pinhole cameras can be scanned; two CCDs having certain transverse distance are adopted to simultaneously detect the reflectedlight of the suspicious area; the imaging time sequence of two CCDs maintain simultaneous, and after the sequence images of the two CCDS undergo difference and information processing, the difference images with high recognition degree can be obtained, and effective identification can be realized. The invention is advantageous in that as the two images obtained are both active detection images, thedifference between the reflected light at background can be little, and the difference between the reflected light of the pinhole cameras can be great, and thereby without too much subsequent information processing, the images aimed by the pinhole camera with high recognition degree can be obtained; the identifying accuracy can be greatly increased, and false-alarm rate can be reduced.

A pair of intelligent spectacles comprises spectacle lenses and a supporting rack. The supporting rack is provided with a first wireless signal sending and receiving module, an image acquisition module, a distance measuring sensor and a voice module, wherein the image acquisition module, the distance measuring sensor and the voice module are respectively and electrically connected with the first wireless signal sending and receiving module. The intelligent spectacles further comprise an image correction module which is respectively and electrically connected with the image acquisition module and the first wireless signal sending and receiving module. The image acquisition module is used for calibrating directions of document images collected by a pinhole camera lens. The supporting rack is further provided with an LED lamp electrically connected with a first power module. A processing device comprises a central processing module, a satellite navigating and positioning module and a second wireless signal sending and receiving module, and the satellite navigating and positioning module and the second wireless signal sending and receiving module are respectively and electrically connected with the central processing module. Because the LED lamp, the distance measuring sensor and the image correction module are adopted for the intelligent spectacles, the intelligent spectacles have the advantages of having a navigation function, being convenient to use and simple in structure, achieving wireless charging, and being accurate in reading, fashionable, attractive and the like.

The invention discloses a swimming pool directional radio signal trigger based on an RFID (Radio Frequency Identification) technology. The directional radio signal trigger comprises a unique transceiver ID, an LED (Light Emitting Diode) event indicator lamp and a miniature pinhole camera, wherein the transceiver ID contains address codes; the address codes are used for determining a fixed coordinate position of a swimmer in the swimming pool through logical computing, meanwhile, when the directional radio signal trigger is activated, the miniature pinhole camera mounted therein monitors and photographs images of a local site area of the directional radio signal trigger in real time. The swimming pool directional wireless signal trigger based on the RFID technology, provided by the invention, is applied in a drowning prevention safety guarantee system based on the RFID technology, can be used for monitoring water bottom state of the swimming pool in an event area through a shore-side monitoring system, and can learn real-time state image information.

The invention relates to an X-ray pinhole camera for an intense laser light condition. The pinhole camera comprises a pinhole plate, a pinhole base housing, a front light-passing barrel, a grazing incidence mirror room, a back light-passing barrel, a negative film room, a negative film box, a filter disc frame, a filter disc, a negative film, a two-dimensional adjusting laser base, a semiconductor laser device and a two-dimensional adjusting bracket, wherein the two-dimensional adjusting laser base is fixedly arranged at the outer side of the negative film room; the semiconductor laser device is arranged at one side, corresponding to the negative film room, of the two-dimensional adjusting laser base; and through holes through which an adjusting laser light passes are formed in optical axis positions of the two-dimensional adjusting laser base and the negative film room. The influence of an ultra-intense g ray under the intense laser light condition is effectively eliminated; the X-ray pinhole camera is well applied to high-temperature dense plasma imaging under the intense laser light condition; and quick and stable installation and adjustment on the X-ray pinhole camera can be carried out through a laser-assisted targeting method.

The invention relates to a method for solving intrinsic parameters of a camera by circular motion in a double-plane-mirror device. The device is composed of two plane mirrors and a pinhole camera, and space points and reflection image points thereof in the plane mirrors are located on a same space circle. The method includes: shooting an object and three images of four reflection images of the object in the plane mirrors, extracting features points from the images, and fitting a curvilinear equation; acquiring an image of the circle center by the aid of symmetrical property of reflection point groups relative to the plane mirrors and tangential property of a curve at the feature points, and then utilizing relation among poles and polar lines to obtain a vanishing line on an image plane, namely an image of a line at infinity; acquiring an interaction of the vanishing line and the curve, namely an image of a circular point, creating six constraint equations of the image of the circular point relative to an absolute conic image, and linearly solving intrinsic parameters of the camera.

The invention discloses a visible light accurate detection system for an electric unmanned helicopter. The visible light accurate detection system comprises a camera, a pinhole camera and a wide-angle camera, wherein the camera is firmly arranged at the position through a fixing device, the camera right faces a camera eyepiece of the electric unmanned helicopter and is attached to the camera eyepiece of the electric unmanned helicopter, the fixing device comprises an inverse-L-shaped support, a threaded boss is arranged on the upper portion of the horizontal part of the support, and the support is fixedly connected with an external flash light slot located above the camera of the electric unmanned helicopter through a nut screwed on the threaded boss; a portion, opposite to the center of the camera eyepiece of the electric unmanned helicopter, of the vertical part of the support is fixedly provided with the camera through a fixing piece, the pinhole camera is used for detecting the fuel quantity and located on the front portion of an oil tank of the helicopter, and the wide-angle camera is arranged below a digital single lens reflex of the electric unmanned helicopter. The three cameras collect three sets of image signals through a video segmentation processor in a multifunctional control box located on a cradle head, the three sets of image signals are transmitted to a display device in a ground station measurement and control vehicle through an image transmission controller, and then the display device displays the three sets of video images at the same time.

The invention discloses a three-dimensional coordinate measurement method based on light ray angle calibration. The method includes the steps of firstly, measuring coordinates of an external aperture and the upper angular point of a target with a two-dimensional checkerboard reference object as a calibration target; secondly, projecting light ray passing through the aperture through the angular point to all planes of a world coordinate system, and calculating the included angle between the light ray and the optical axis of a camera; thirdly, shooting a single image, obtaining coordinates of a lower angular point of an image coordinate system through a Harris angular point detection algorithm, and obtaining the included angles between the light rays, passing through the aperture, of all pixel points on the CCD target face and the optical axis according to the pinhole camera principle with pixels as unit interpolations; fourthly, calculating spatial coordinates of any point on the calibration target face through the angle matrix. The requirement of the method for devices is low, the system structure is simple, the measurement result has high accuracy, and real-time measurement can be completed.