315 results about "Frame grabber" patented technology

A moving object monitoring surveillance apparatus that controls a camera using a motorized panhead and a motorized zoom lens to identify correctly a moving object, particularly, a person is disclosed. The apparatus includes a video device acquiring information of the image of a moving object as a video signal, a panhead for panning and tilting the video device, a frame grabber for extracting, frame by frame, a still image from the video signal output from the video device and binarizing the still image into frame data, a plurality of frame memories for alternately storing the binarized frame data, a CPU for controlling the operation of the panhead and for processing the frame data, and an image database for storing the processed data. The video device sequentially monitors at least one single surveillance area. The CPU compares frame data with immediately prior frame data to determine a difference therebetween, tracks coordinates corresponding to the difference if the difference is detected, and detects and expands a particular color.

A method of capturing a focused image of a continuously moving slide / objective arrangement is provided. A frame grabber device is triggered to capture an image of the slide through an objective at a first focus level as the slide continuously moves laterally relative to the objective. Alternatingly with triggering the frame grabber device, the objective is triggered to move to a second focus level after capture of the image of the slide. The objective moves in discrete steps, oscillating between minimum and maximum focus levels. The frame grabber device is triggered at a frequency as the slide continuously moves laterally relative to the objective so multiple images at different focus levels overlap, whereby a slide portion is common to each. The image having the maximum contrast value within overlapping images represents an optimum focus level for the slide portion, and thus the focused image. Associated apparatuses and methods are also provided.

The invention relates to a light source alternate strobe synchronous camera shooting method and a vision detection system. The light source alternate strobe synchronous camera shooting method is characterized in that the vision detection system is arranged and comprises a camera, a spike filter, light sources, a trigger signal generating device, an image collecting card and an image processing module; the vision detection system is placed above an object to be detected; the trigger signal generating device simultaneously sends multi-way synchronous square signals to a camera shutter and each of the light sources to trigger the camera shutter and the light sources to work; during one trigger period of the synchronous square signals, the light sources are alternately lightened to irradiate the object to be detected, during the period that each of the light sources is lightened, the camera shoots an image of the light source irradiated object to be detected and sends the image to the image processing module through the image collecting card; and during different trigger periods of the synchronous square signals, the light sources are alternately lightened or extinguished in certain frequency periods, and the camera alternately shoots images of the object to be detected until all the images of the object to be detected are collected. The light source alternate strobe synchronous camera shooting method and the vision detection system can be widely applicable to processes that objects to be processed are subjected to image shooting during groove detection, rear-time welding seam tracking, welding seam molding quality detection and the like in robot automatic welding.

System and method for selectively updating a display in a multiple display device system. Software executing on the computer system analyzes information associated with the display devices, e.g., respective levels of user activity (e.g., peripheral activity), graphics activity (e.g., changes in image data), and / or application activity, associated with each display device, optionally generating priority information associated with the display devices. The display devices are updated in accordance with the analysis using two or more update rates, optionally based on the priority information, e.g., by generating a sequence of video frames based on the analysis, each video frame including a video image and frame identifier designating a display device, and transmitting the sequence over the cable to a plurality of frame grabbers, each frame grabber examining the sequence of video frames, selecting a video frame based on the frame identifier, and forwarding the video frame to the designated display device.

A chromokeying system includes a store that contains a representation of a known coded chromokeying pattern. The system further includes a frame grabber that grabs a video image including at least a portion of the known coded chromokeying pattern and a foreground subject. A perspective transformation computation unit computes a perspective transformation by comparing the video image of the portion of the coded chromokeying pattern with the known chromokeying pattern. The system may further include a background generation unit that receives a background image and applies the perspective transformation to the background image to produce a transformed background. The portion of the coded chromokeying pattern in the video image can then be replaced by the transformed background to create a composite image.

The present invention relates to a free multi-view real time three-dimension reconstructing system and a method thereof. The system consists of a CCD vidicon, a computer assembled with a multi-channel image collecting card and a plane demarcating template. Two concentric circles and eight tangential paths with prolonged lines crossing the circle center are drawn on the center of the plane demarcating template and are used for demarcating the vidicon parameter. In the technical proposal of the present invention, a reconstructing object is fixed at the center of the demarcating template; the template is held by hand to drive the reconstructing object to rotate freely within the range of the view and the depth of field of a vidicon at a fixed position; image collection and object reconstruction are processed synchronously, thereby being capable of finding concentrated missed view in time and displaying reconstruction result in real time. The three-dimension reconstructing method comprises the steps of image segmentation, full-automatic vidicon demarcation and the three-dimension reconstruction of object shape, etc. The three-dimension reconstructing system of the present invention is based on the computer vision technology, and the reconstructing method is based on the profile recovery shape and can realize free multi-view real time three-dimension reconstruction.

The present invention provides systems and methods for monitoring a host computing system from a maintenance computing system located at a remote location. The system of the present invention includes a frame grabber that is connected the digital output of a video controller associated with the host computing system and collects sets of data output in digital form from the video controller independent of an analog to digital converter. Each collected digital data set represents a frame of data displayed on a terminal of the host computing system by the video controller and is stored in a storage device associated with the frame grabber. Successive sets of data are also compared to each other, and the differences between the data are also stored in the storage device. During a maintenance session, a first data set representing the data currently displayed on the terminal of the host computing system is transmitted to the maintenance computing system, and thereafter, only changes between successive data sets are transmitted to update the maintenance computing system.

The invention discloses an interactive electric whiteboard system. The system consists of an image acquisition device, a projection device, a computer, a wireless receiving device with a USB interface, a whiteboard and an electric whiteboard pen, wherein the image acquisition device and the projection device are all connected with the computer; the computer is connected with the wireless receiving device with the USB interface which is used for receiving a wireless signal from the electric whiteboard pen, sending the wireless signal to the computer and controlling the operation of the computer; the electric whiteboard pen is provided with an infrared transmission device, the light transmitted from the infrared transmission device can form an infrared light spot on the whiteboard, and the infrared light spot is acquired by the image acquisition device and transmitted to the computer by an image acquisition card; the computer can work out the relative position of the electric whiteboard pen projected on the whiteboard; the relative position is utilized to generate an image, and simultaneously the projection device projects the image contents on the whiteboard; and the functions of a keyboard and a mouse can be realized by the electric whiteboard pen.

A digital image monitoring system with functions of motion detection and auto iris which aims at the requirement of video-recording monitoring for traffic facilities, home or company which is composed of CCD camera, lens, frame grabber, illumination-reflectance decomposition unit, illumination variation detection unit and motion detection unit. The frame grabber accompanies with the CCD camera and lens to take digital images continuously. Then the illumination-reflectance decomposition unit decomposes the captured digital image and transfers it into the illumination and reflectance spectrum to provide the illumination detection unit to analyze the illumination spectrum variation between two adjacent image frames and thus this spectrum variation is used to control the amplification or reduction of the iris; beside ,an object movement detection unit is provided to analyze the illumination variation of two adjacent films to judge if the object in the frame is moving .

The invention relates to a human face identification work-attendance checking method and a system based on network. The method is technically characterized by comprising the following steps: each work-attendance checking point uses a computer which is connected with a camera and provided with an image acquisition card as a front-end acquisition device for checking work attendance; work-attendancedata is uploaded to a data server in a work-attendance management center through the network, and meanwhile, a comparison server of the work-attendance management center compares the uploaded data andstores the comparison result in the data server; and an administrator of each acquisition point accesses the data server through the network according to needs and downloads the work-attendance record report forms of employees. By combining the high-tech human face identification technology with the network-based management mode, the invention can simultaneously provide a plurality of companies with a work-attendance checking system with low operation cost and high accuracy and enable related personnel of the human resources management department in the company to efficiently check and recordthe regular work-attendance conditions of every employee.

The invention relates to a device for realizing time delay integral of an area array CMOS image sensor. The device comprises a TDI sequential control device and a random access memory. The TDI sequential control device generates a CMOS image sensor driving waveform, and the CMOS image sensor starts to output digital image generated by push-broom imaging to the random access memory; TDI controlled time sequence generated by the TDI sequential control device is transmitted to the random access memory, time delay integral process of the digital image is completed in the random access memory, and various levels of the processed integral results are stored; and the final image after time delay integral processing is transmitted to an image acquisition card or the memory. On the premise of not changing the structure of the area array CMOS image sensor, the device can achieve the time delay integral of the digital image by virtue of an external part so that an area array CMOS imaging system can become the future imaging system for achieving ground remote sensing instead of TDI CCD.

Images of farm animal products taken by CCD camera through image acquisition card are transferred to computer. Under certain condition (temperature, humidity and flow rate), smells emitted from farm animal products through mini pump with no oil are sucked into reaction chamber, where signals are generated by array of gas sensor. The said signals through conditioning circuit, A / D acquisition card are transferred to computer. Computer for simulating human brain to treat vision data and smell data carries out syncretizing and pattern recognition processing. Combining with experts' knowledge in knowledge base as well as experiences, computer makes judgment for qualities of garden spgarden stuff, meat and corns etc. synthetically.

The invention discloses a method and instrument for counting the people coming in and going out, composed of CCD camera and PC (personal computer), where the CCD camera is fixed on the top of a passageway and connected with the PC by lines, and the PC is installed with picture collection card and picture recognition algorithm software that comprises five modules, i.e. target-background separating module, background reconstructing module, target picture post-processing and recognizing module, target detecting-tracking module and data accounting-outputting module; and the counting method uses the picture collection card to collect the pictures, circularly, real-timely recognizes each collected picture frame, then makes target-background separation, reconstruction, connectivity analysis and false target elimination on the target pictures, after separating the bonded target pictures, compares them with the standard target pictures of human bodies to judge their behavior, and finally counts the people coming in and going out and outputs the count. The invention can be adapted to count the people coming in and going out in various orders.

The invention researches the substantive characteristics of material deformation to aim at the practical problem of measuring real stress-real strain and discloses a real stress-real strain calculating model and a practical testing system: 1, based on the analysis on the deformation of a tension specimen, taking a unit body the special part of which is provided with characteristics as the object for the stress-strain analysis, building a unique full-deformation unit model, firstly solving the theory analysis problem of real stress-real strain, establishing a theory foundation and building a novel real stress-real strain calculating formula: Sigma i is equal to 4Fi / Pi d<2>I and Epsilon is equal to (d<2>0 / d<2>i) minus 1; 2, adopting a machine visual technology and an image processing method to develop a practical software system and a practical hardware system that are compatible with the machine visual technology and the image processing method, and realizing the direct non-contact real stress-real strain measuring in real meaning; 3, the testing system includes a light source (1), CCD camera (2), an image acquisition card (3), a data acquisition card (4) and a material testing machine (5); 4,the software includes image capturing program, load data acquisition program and comprehensive calculation analysis program.

The present invention discloses a method for detecting corona discharging and a device thereof. The method includes steps as follows: A. ultraviolet imagery instrument image-forming; B. collecting the image-forming data to a computer through an image collecting card; C. processing through an image processing program: processing data collected by an image collecting module through the image processing program, the image processing includes: intercepting picture in the video, extracting image, processing image layer extractor to the image, spatial filtering processing, then valve quantity, stating an irradiancy area and a total area in the image, then comparing and obtaining the irradiancy area ratio, finally, obtaining the irradiancy area ratio for characterizing corona strength which includes: a ultraviolet imagery module, an image collecting module, an image processing module, a display module, the image collecting module connects with the ultraviolet imagery module and the image processing module, the image processing module connects with the image collecting module and the display module respectively. The device has simple operation, stable testing and reliable data which can provide direct and obvious data for user.

The invention relates to welding field, especially relates to a flying slice driving laser microwelding method and device, adapted to quick welding between homogeneous or heterogeneous metallic materials. The invented device is composed of a laser, a reflection mirror, a focusing lens, a focusing lens supporting frame, a focusing lens moving platform, a confinement layer, a confinement layer supporting frame, a confinement layer moving platform, a worktable, a three-dimensional moving platform, a L-shaped base, a CCD cam, a D / A converter, an image gathering card, and a computer. The single pulse laser controlled by the computer accurately acts on the front surface of the flying slice to generate explosion plasma which drives the workpiece adhering tightly to the back of the flying slice to moving with a high speed while driving the flying slice moving with a high speed, the flying slice collides with the base after flying for a distance, and high temperature and high pressure are generated on the colliding boundary to implement welding between the workpiece and the base. The invented method and device realize low cost and high efficiency of microwelding, are provided with simple technique and good compatibility, and are suitable for automated production.

The invention discloses a method for automatically identifying the action of writing on blackboard of a teacher in class video recording, which belongs to image recognition technology in a long-distance educational system, which comprises the following processing steps: a, capturing a frame of image by using a frame grabber, subtracting a previous frame of image from the current image to obtain a binary frame difference image and analyzing the binary frame difference image; b, subjecting the binary frame difference image to closed operation in mathematical morphology, marking communicated regions and removing obvious noise regions in the binary frame difference image by setting a threshold; c, acquiring a target rectangular frame and calculating the area of the rectangle, determining the movement of a human body when the area of the rectangle meets a certain condition and detecting and identifying the behavior of the writing of the teacher on the blackboard; d, when the more than 5 successive frames of images of behavior of writing on the blackboard are detected, stretching a camera; and e, if no 50 successive frames of images of the behavior of writing on the blackboard are detected, restoring the stretching magnification to an initial magnification.

The invention relates to a discontact location input system and method guided by hand and eye. It includes two CCD video cameras, a large scale display terminal, a computer installed plural image acquisition card. The system uses platform labeling module to label video camera parameter. The location input method includes following steps: full automation video camera demarcating, hand and eye location gathering, and demarcating target point solving. The invention is based on computer vision technology, and has the advantages of visual, accurate and real time.

A frame grabber comprising image signal decoders to convert the analog image signal to digital image data, a multiplexer to select the image data stream sent from the image signal decoders, frame memories and a memory controller to control the digital image data in a unit of frame data to be transferred to an external main image processor unit further has a pulse generator, a pulse counter, a bus controller for transferring the frame data and a time stamping code generator to consolidate the same time base between the in-frame image data and other data used for robot controlling.

The invention relates to free multi-viewpoint multi-projection three-dimensional display system and method. The system includes one to five videotape color CCD video cameras, one calibration color CCD video camera, two to eight projectors, one large screen display terminal, one calibration plate, and the compute set multi-path synchronization image acquisition card by which it is connected with the video camera, and multi-path output display card by which it is connected with the projector. The method includes the steps that image source video frequency coding, projector calibration, stereo image mosaicking. The invention can realize large screen vivid three-dimensional multi-projection display based on computer vision technology.

An automated eye corneal striae detection system for use with a refractive laser system includes a cornea illuminator, a video camera interface, a computer, and a video display for showing possible eye corneal striae to the surgeon. The computer includes an interface to control the corneal illuminator, a video frame grabber which extracts images of the eye cornea from the video camera, and is programmed to detect and recognize eye corneal striae. The striae detection algorithm finds possible cornea striae, determines their location, or position, on the cornea and analyzes their shape. After all possible eye corneal striae are detected and analyzed, they are displayed for the surgeon on an external video display. The surgeon can then make a determination as to whether the corneal LASIK flap should be refloated, adjusted or smoothed again.

The invention discloses a device and a method for online detection on appearance defect of a minitype connecting part based on machine vision. The detecting device comprises a red LED (light-emitting diode) backlight source, an industrial camera, a PC machine containing an image collecting card, a proximity switch, a PLC (programmable logic controller) and a bracket, wherein the red LED (light-emitting diode) backlight source is fixedly arranged on the bracket; the industrial camera is arranged on the bracket and can move up and down so that the detected connecting part is within the visual field of the industrial camera; the red LED (light-emitting diode) backlight source is arranged right below the lens of the industrial camera; the bracket is provided with a detecting worktable that is arranged between the red LED (light-emitting diode) backlight source and the industrial camera; the detecting worktable is provided with a light-permeable hole at the visual capturing field of the industrial camera; the PLC is connected with the red LED (light-emitting diode) backlight source, the industrial camera, the PC machine and the proximity switch respectively; and the proximity switch approaches to the detecting worktable. The device and the method can realize the aim of online detection on the appearance defect of the minitype finely-blanked connecting part inerrably at high speed and high precision.

A method for measuring three-dimensional outline based on raster projection of phase shift includes projecting raster picture with sine distribution on measured object; finalizing phase shift procedure by controlling projective fring with computer; using CCD camera, image collecting card and computer to work out trans shaped raster pictures and three-dimensional face shape of the object. The device for realizing the method is also disclosed by the present invention.

The invention discloses a measuring device of dense two-phase flow particle speed and concentration spatial distribution. The invention is characterized in that: the device comprises an image acquisition terminal and an image processing unit (8); the image acquisition terminal is used for shooting a motion video of a particle (2) in a fluidization apparatus (1), and the image acquisition terminal comprises a laser source (9), a fiber endoscope (3), a high speed industrial camera (4), an image acquisition card (6) and a computer (7); a sheet-shaped laser beam (10) is provided by the laser source (9) to determine a measurement area in the fluidization apparatus (1); the fiber endoscope (3) shoots the determined measurement area as an optical lens, a lens of the fiber endoscope (3) is parallel with a plane of the laser beam (10), and a distance between the lens and the laser beam (10) is maintained at 10 mm. According to the invention, since the fiber endoscope is used as the optical lens, multi-angle measurement in a flow field is conveniently realized, and a difficulty that a motion parameter of the particle in a dense phase flow field can not be obtained is overcome.

An automated eye corneal striae detection system for use with a refractive laser system includes a cornea illuminator, a video camera interface, a computer, and a video display for showing possible eye corneal striae to the surgeon. The computer includes an interface to control the corneal illuminator, a video frame grabber which extracts images of the eye cornea from the video camera, and is programmed to detect and recognize eye corneal striae. The striae detection algorithm finds possible cornea striae, determines their location, or position, on the cornea and analyzes their shape. After all possible eye corneal striae are detected and analyzed, they are displayed for the surgeon on an external video display. The surgeon can then make a determination as to whether the corneal LASIK flap should be refloated, adjusted or smoothed again.