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57results about How to "Reduce the number of frames" patented technology
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Video image processing method and video image processing device
ActiveCN106354816ASolve the detection speed is slowQuick checkVideo data queryingCharacter and pattern recognitionVideo imageVideo based
The invention provides a video image processing method and a video image processing device. The method includes: acquiring a video image sequence; recognizing a target object from a video image frame in the video image sequence; tracking the target object, and determining a motion trail of the target object; acquiring video structural information on the basis of the target object and the motion trail of the target object; performing target object retrieval and / or video compression on the video image sequence on the basis of the video structural information. On the basis of the video image processing method and the video image processing device, quickness in target investigation is realized, target investigation is accelerated, and case cracking speed is increased.
Owner:NEUSOFT CORP
Fast association wakeup method of wireless body area network
ActiveCN104301973AReduce transmissionReduce energy lossPower managementConnection managementBody area networkEnergy loss
The invention discloses a fast association wakeup method of a wireless body area network. The fast association wakeup method of the wireless body area network includes the steps that the frame head, the frame body and the frame tail of a wakeup frame are determined; a unicast wakeup association is adopted and comprises a brand new unicast wakeup frame and a unicast wakeup association mechanism; a multicast wakeup association comprises a multicast wakeup frame, an address index number comparison table and a multicast wakeup association mechanism. Through the method, the needed time from wakeup to MK establishment is shortened, the node awaiting time is shortened, and therefore the node energy loss is reduced to a certain extent, and the method can be used for the association wakeup process of sensing nodes in the wireless body area network.
Owner:XIDIAN UNIV
Video preprocessing and playing method and system
InactiveCN102054510AReduce in quantityImprove browsing efficiencyCarrier indexing/addressing/timing/synchronisingControl functionLine segment
The invention relates to the technical field of multimedia, in particular to a video preprocessing and playing method and system. The method comprises the following steps of: (1) extracting video segments including contents that users are interested in through video segmentation by using a public intelligent video technology; (2) storing information of the video segments into a database or an accompanying document; and (3) organizing the video segments in chronological order into a logical video file. The video preprocessing and playing method and system achieve the function of conventional playing control of the logical video file, and can be used for smoothly switching the playing control between the video segments and an original video file, thereby reducing the number of video frames required for watching, allowing the users to concentrate on important frames, and improving the video browsing efficiency.
Owner:WUHAN UNIV +1
Method for extracting key information frame from monitoring video
ActiveCN104618679AReduce the number of framesTelevision system detailsColor television detailsReal-time computing
The invention discloses a method for extracting key information frame from a monitoring video. The method is that the video is divided into three types, namely, moving time piece, static time piece, and discontinuous moving time piece; the moving time piece contains more usable information and the frame can be extracted at relatively small intervals; the static time piece contains less usable information and the frame can be extracted at large intervals; the discontinuous moving time piece possibly contains important information and the frame containing the moving objects is pumped. According to the core technology, the monitoring video is divided into the time pieces of the three types, different frame extracting strategies are performed for the pieces of different types, and therefore, more usable information can remained while the quantity of the monitoring video frames is greatly decreased.
Owner:NANJING ZHIHU INFORMATION TECH
Mobile communication network wireless network voice optimizing method
InactiveCN106034306AAchieve precise alignmentImprove voice qualityNetwork topologiesNetwork planningWireless mesh networkWireless network coding
The invention discloses a mobile communication network wireless network voice optimizing method. The mobile communication network wireless network voice optimizing method comprises the steps that the current network state is detected at first, whether the current network is the mobile communication network wireless network or not is judged, and if not, operation is automatically stopped; if yes, signaling data and voice data of the mobile communication network wireless network are automatically detected; the signaling data and voice data of the mobile communication network wireless network are collected, and signaling and voice association is carried out; the collected data is analyzed, the wireless network state and problem are judged according to a voice quality analysis result, and the voice quality of the wireless network is optimized; finally, the optimal optimization rate based on the voice service is analyzed and calculated, and the optimal optimization rate of the mobile communication network wireless network voice service is obtained. The service capacity of the mobile communication wireless network is brought into full play, the voice optimizing method can be updated in time according to the current situation of the mobile communication network wireless network, and resources are dynamically adjusted.
Owner:SHANDONG UNIV OF SCI & TECH
Video bitstream frame extraction process and device
ActiveCN104639951AIncrease playback speedMeet custom needsSelective content distributionVideo bitstreamMultiple use
The present invention discloses a video bitstream frame extraction process and device. The aforementioned process comprises receiving and storing video bitstreams from an IPC; and during playing back the stored video bitstreams, conducting an SVC frame extraction process on the stored video bitstreams, wherein the frame extraction multiple used in the SVC extraction process is dynamically adjusted according to a playback rate selected by a user. According to the technical solution provided in the present invention, the process and device effectively improve the speed for playing video bitstreams during a quick playback process.
Owner:HANGZHOU HIKVISION DIGITAL TECH
A monitoring video multi-target classification retrieval method and system based on depth learning
ActiveCN109241349AEnsure build efficiencyReduce in quantityMetadata video data retrievalCharacter and pattern recognitionFeature extractionRetrieval result
The invention discloses a monitoring video multi-target classification retrieval method and system based on depth learning. The method comprises: extracting the object to be retrieved: inputting the image to be retrieved, selecting the object to be retrieved by automatic detection or manual digging, and determining the category of the object; extracting depth features: extracting depth features ofthe object to be retrieved by using depth learning feature extraction model; retrieving object: according to the category of the object to be retrieved, comparing the depth feature of the object to be retrieved with the depth feature of the same kind of object in the retrieval database to obtain the object most similar to it; displaying Retrieval results: displaying the retrieval results according to similarity from high to low. Depth features obtained by depth learning feature extraction module are used as the benchmark to match the retrieved target and the similar target in the retrieval database. Because depth features have the advantages of both strong expression and low dimension, the precision of retrieval results is greatly improved.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Online simulation system for necessary bit single event upset fault on SRAM type FPGA
ActiveCN109858195AReduce the number of framesGuaranteed priorityDigital storageSpecial data processing applicationsCommunication interfaceSystems design
The invention discloses an online simulation system for a necessary bit single event upset fault on an SRAM type FPGA. The system design method belongs to the technical field of testing. The system isdesigned to be composed of an upper computer (1), namely a PC end, and a lower computer (2), namely an FPGA end. The system design of the upper computer (1) comprises a test interface (101), a necessary bit file extraction module (102), a debugging bit stream file analysis module (103) and a communication interface (104); the system design of the lower computer (2) comprises a main control module(201), a to-be-tested circuit (202), a gold circuit (203), a comparison circuit (204), a serial port communication module (205), a JTAG interface (206) and a configuration RAM (207). A test interface(101) located on an upper computer (1) sends an instruction command to a lower computer (2) to control a simulation process of single event upset fault simulation, and the lower computer (2) executescorresponding operation according to the received command and then returns a result. The method does not need participation of a processor, does not need external hardware expenditure, and can be flexibly transplanted to other ICAP-supporting FPGA chips.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
Global system for mobile communication (GSM) neighbor cell searching method for dual-module terminal and dual-module terminal
ActiveCN101965033AReduce usageAvoid mutual interferenceEnergy efficient ICTAssess restrictionTD-SCDMACell search
The invention relates to the field of communication and discloses a GSM neighbor cell searching method for a dual-module terminal and the dual-module terminal. In the invention, the dual-module terminal of a time division synchronous code division multiple access (TD-SCDMA) mode opens a GSM neighbor cell searching function when the predetermined conditions are met, which means receiving GSM frames continuously in a predetermined frame number and pausing the receiving of TD-SCDMA sub-frames until a frequency correction channel (FCCH) of the GSM is detected; and computing the position of a synchronous channel synchronization channel (SCH) signal in the next frame according to the position of the FCCH signal in the GSM frame, receiving the SCH signal and completing the GSM neighbor cell searching. In the invention, under the condition of guaranteeing small influences on the TD-SCDMA service performance, the TD-SCDMA and GSM radio frequency (RF) receiving is completed by an RF chip, so that a great amount of cost is saved, and power consumption is low.
Owner:SPREADTRUM COMM (SHANGHAI) CO LTD
Method for detecting laser welding quality in real time
InactiveCN102990225AAccurate detectionReduce the number of framesLaser beam welding apparatusMonitoring systemLight signal
The invention discloses a method for detecting laser welding quality in real time, The method comprises the following steps of acquiring a laser welding sound signal in real time by using a sound signal acquiring system and storing the laser welding sound signal; carrying out analytical calculation on the laser welding sound signal and a noise source signal by using a computer, separating a laser welding characteristic sound signal from a noise source, and acquiring a distribution diagram of sound pressure level strength of a space radiation sound field; filtering the interference from a light signal by using a weld pool pinhole monitoring system, shooting and storing a weld pool pinhole image; and overlaying the distribution diagram of the sound pressure level strength of the space radiation sound field into the weld pool pinhole image by using the computer, acquiring the sound pressure level strength and a weld pool pinhole state at a certain moment, comparing the sound pressure level strength and the weld pool pinhole state at the certain moment with preset sound pressure level strength and weld pool pinhole state under a normal welding condition so as to determine the laser welding quality. By using the method, the state of a pinhole is observed in real time, and the laser welding quality is improved.
Owner:TIANJIN UNIV
Criminal investigation video preprocessing method based on traveling direction detection
ActiveCN102810208AImprove browsing efficiencyReduce the number of framesImage analysisPretreatment methodDirection detection
The invention discloses a criminal investigation video preprocessing method based on traveling direction detection. The method comprises the following steps of: setting an attention line in an interested area according to a video picture, performing moving target traveling direction detection on the video content by combining the set attention line, and extracting a key frame number; and merging the extracted video frames into a novel video. By the preprocessing method, the traveling direction detection can be combined with attention line cross target detection, so that a video frame number with a target in an attention range in a criminal investigation video is obtained, uninterested video frames in the video are filtered, the extracted key frames are reintegrated into a novel video for browsing, the video frames required to be watched are reduced, and the information required to be attended is not lost, so that the browsing efficiency of the criminal investigation video is improved.
Owner:WUHAN DAQIAN INFORMATION TECH
Voice wake-up detection method, device and equipment and storage medium
ActiveCN110619871AReduce occupancyReduce the number of framesSpeech recognitionHigh level techniquesMultiple frameSequence memory
The invention provides a voice wake-up detection method and device, equipment and a storage medium. The method comprises steps of inputting an audio data frame in a preset range near a target frame inmultiple frames of audio data and a target frame into an acoustic model assembly together, wherein the acoustic model assembly is a feedforward sequence memory neural network model assembly, and theoutput of the acoustic model assembly is a state recognition result of the target frame and at least one frame of audio data in audio data frames within a predetermined range; taking a single frame ofaudio data which is located behind the target frame and does not be processed in the multiple frames of audio data as a next target frame, and iteratively using the acoustic model assembly to processa plurality of subsequent target frames; and comparing the state identification result of the audio data of the plurality of frames in the plurality of frames of audio data with a preset wake-up wordto identify whether the plurality of frames of audio data are wake-up instructions or not. Therefore, good awakening performance can be guaranteed while occupation of equipment end resources is reduced, and the requirement for real-time performance required by awakening is met.
Owner:ALIBABA GRP HLDG LTD
Image sensor system using CMOS image sensor and image sensor apparatus using CMOS image sensor
InactiveUS7230649B2Reduce power consumptionSacrifice image qualityTelevision system detailsTelevision system scanning detailsAutomatic controlCMOS
An image sensor such as the conventional CMOS image sensor, in which automatic controls including so-called automatic iris control and white balance adjustment for adjusting the sensor sensitivity, namely the charge accumulation time in each pixel, according to the brightness of the image sensing ambience are performed, involves the problem that, when the frame rate of the image sensor is slowed to save power consumption, the operation of the automatic control systems will also become slower and the image quality deteriorates. In the invented image sensor system using a CMOS image sensor, while a CMOS image sensor is operated at the full frame rate all the time, a circuit for processing image signals from the CMOS image sensor is operated at a speed close to that of full frame processing only when the power supply is turned on or when the image sensing ambience varies and switched to a lower frame processing speed when automatic controls, including iris control, have become stabilized.
Owner:RENESAS ELECTRONICS CORP
System for managing wakeup and sleep events of computers connected to a motor vehicle can network
InactiveCN102257768ASpeed up frame processingReduce the risk of conflictNetworks interconnectionNetwork connectionsMobile vehicleMotorized vehicle
The invention relates to a system for managing wakeup and sleep events of computers (26, 28, 30) connected to a motor vehicle secondary CAN network (12), said secondary CAN network (12) being connected to a main CAN network (10) by means of a gateway (14). The system comprises a master computer (16) which is connected to the main CAN network (10) and capable of managing the wakeup and sleep events of the computers (26, 28, 30) through the exchange therewith of wakeup and sleep frames via the gateway (14). According to the invention, the gateway (14) can: synthesize a single wakeup and sleep frame on the basis of several wakeup and sleep frames emitted by the computers (26, 28, 30), and emit this single frame to the master computer (16) which is configured to interpret said frame.
Owner:RENAULT SA
Grating strip phase solving method used for three-dimensional measurement
InactiveCN105043301AReduce the number of framesReduce the number of streaksUsing optical meansGratingThree dimensional measurement
The invention provides a grating strip phase solving method used for three-dimensional measurement. The method comprises the steps that a four-amplitude grating strip is generated by a computer; a projector is used to transmit the generated four-amplitude grating strip to the surface of an object to be measured, and a camera is used to synchronously shoot a four-amplitude strip image modulated by the object to be measured; according to the four-amplitude strip image, two different phases in the four-amplitude grating strip are solved; and phase unwrapping is carried out to acquire an absolute phase of three-dimensional reconstruction. According to the invention, simply through the light stripe in a four-amplitude structure, phase solving and unwrapping can be carried out.
Owner:NANJING UNIV OF SCI & TECH
Map lane information updating method and system based on unmanned aerial vehicle
PendingCN113449692AImprove update efficiencyReduce the number of framesDatabase updatingCharacter and pattern recognitionComputer graphics (images)Stream data
The invention discloses a map lane information updating method and system based on an unmanned aerial vehicle. The method comprises the following steps: acquiring video stream data acquired by the unmanned aerial vehicle; intermittently extracting an image set in the video stream data based on a first time interval; extracting first frame image data contained in the image set and calculating first lane information contained in the image data; calling second lane information which is the same as the position information of the first frame of image data in a map, calculating a difference value between the first lane information and the second lane information, and if the difference value exceeds a first threshold value, updating the map based on the first lane information; and extracting the next frame of image data contained in the image set and judging whether the map is updated or not until all frames of image data contained in the image set are traversed.
Owner:CHENGDU JOUAV AUTOMATION TECH
Video-based human body behavior recognition method, device and equipment and storage medium
ActiveCN111259751AReduce the number of framesSmall amount of calculationBiological neural network modelsCharacter and pattern recognitionHuman bodyComputer graphics (images)
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
Multiple video data compression and reconstruction method
ActiveCN107371026ASimple stepsEasy to implementImage analysisDigital video signal modificationData compressionReconstruction method
The invention discloses a multiple video data compression and reconstruction method. The method comprises the following steps: step 1, obtaining video image information; step 2, performing first level video image compression; step 3, performing second level video image compression; step 4, performing video image reconstruction; step 5, performing video image encoding; step 6, performing video image decoding; and step 7, displaying a video image. According to the multiple video data compression and reconstruction method, the number of video image frames having large similarity is reduced by primary compression, the pixel points of the video image are reduced by secondary compression, the continuous image resolving power of human eyes is guaranteed by data reconstruction, the data size and the complexity of the H.264 encoding are reduced by the primary compression, the secondary compression and the data reconstruction, the continuous image resolving power of human eyes is satisfied, and the possibility of mass real-time video data transmission is also satisfied under the requirements of limited communication channel transmission properties, and meanwhile the occurrence rate of channel congestion is reduced, and the field information can be effectively reflected.
Owner:XIAN UNIV OF SCI & TECH
Method for scheduling message at static segment of automobile FlexRay bus
ActiveCN107204881AReduce the jitter valueImprove bandwidth utilizationBus networksDistributed computingBandwidth utilization
The invention discloses a method for scheduling a message at the static segment of an automobile FlexRay bus and proposes an integral linear programming problem model for solving message parameters. As for a given FlexRay network system, the model takes the weighted sum of the frame number of node allocation and jitter values of node messages as an optimization objective and requests that the smaller the weighted sum of the frame number of network allocation nodes and the jitter values of the node messages, the better, the optimal repeated message sending cycle is solved under the constraint condition of the repeated message sending cycle smaller than or equal to the repeated message generation cycle, a network static segment node allocation frame number equation and a node message jitter value equation, repeated sending cycles corresponding to all messages of the FlexRay network static segment and allocated frames are further obtained, and an algorithm is provided for parameter configuration of the network static segment. The network bandwidth utilization rate can be increased, and the method is applicable to the non-synchronous conditions of the repeated message cycles and the FlexRay communication cycle.
Owner:HEFEI UNIV OF TECH
Time-of-flight method and structured light method fused structured light three-dimensional imaging system and method
ActiveCN112987021AFast imagingReduce the number of framesElectromagnetic wave reradiationComputer graphics (images)Computational physics
The invention discloses a time-of-flight method and structured light method fused structured light three-dimensional imaging system and method. The method comprises the following steps: constructing an MEMS-based time-of-flight method and structured light mixed imaging system; calibrating a coordinate transformation relation between a projection system and a camera; collecting data of a time-of-flight method and a structured light method; reconstructing low-precision three-dimensional data by using the time-of-flight method; reconstructing close-range high-precision three-dimensional data by using the low-precision three-dimensional data and the structured light method; and fusing the low-precision three-dimensional data and the high-precision three-dimensional data. An MEMS micromirror is used in cooperation with a laser and a digital camera, flight time three-dimensional imaging and structured light three-dimensional imaging are completed in the same system at the same time, data fusion is carried out, and the advantages of different imaging methods are brought into full play. Besides, the time-of-flight method is used to help the structured light method to perform phase unwrapping, the frame number of traditional structured light is reduced, and the structured light three-dimensional imaging speed in the method is greatly improved.
Owner:革点科技(深圳)有限公司
Image device, image processing system and method thereof
ActiveCN100461866CReduce the use effectLow costPulse modulation television signal transmissionDigital video signal modificationImaging processingVideo processing
Owner:MEDIATEK INC
Encoding and decoding methods and devices for multidimensional video data
ActiveCN107948628AGuaranteed clarityReduce the number of framesDigital video signal modificationSteroscopic systemsPattern recognitionDecoding methods
The embodiments of the application provide encoding and decoding methods and devices for multidimensional video data. The encoding method includes the following steps: detecting the current network transmission parameters during the transmission of multidimensional video data, wherein the multidimensional video data includes M frames of original image data at the same time point; determining the number of images N according to the network transmission parameters; extracting N frames of original image data from the M frames of original image data according to the number of images N; and encoding the N frames of original image data to obtain N frames of target image data. Through the embodiments of the invention, the number of frames of original image data can be appropriately reduced according to the actual transmission situation, and thus, the occupation of bandwidth is reduced. In addition, as the occupation of bandwidth is reduced, the original image data can be encoded at a high bitrate, there is no need to encode the original image data at a low bit rate because of bandwidth limitation, and the resolution of multidimensional video data is ensured.
Owner:ALIBABA GRP HLDG LTD
Image recognition method
InactiveCN113435359AReduce the number of framesReduce consumptionCharacter and pattern recognitionImaging processingRadiology
The invention provides an image recognition method, and relates to the technical field of image processing. In the application, firstly, a target monitoring video sent by a target monitoring device is acquired; secondly, multiple monitoring video frames included in the target monitoring video are screened, and multiple target monitoring video frames are obtained; then, the target monitoring video frame is recognized to obtain a corresponding recognition result, and the recognition result comprises whether the behavior of the target monitoring object meets a preset monitoring condition or not. On the basis of the method, the problem that in an existing image processing technology, computing resource consumption is large can be solved.
Owner:李思雨
Wireless channel access control method based on vehicle teams
InactiveCN108471605AReduce the number of framesReduce the probability of message collisionsNetwork traffic/resource managementParticular environment based servicesResidenceControl channel
The present invention discloses a wireless channel access control method based on vehicle teams. The method is applied to the technical field of wireless communication, and is used for solving the problem that in the prior art, vehicle wireless transmitting-receiving equipment cannot fully transmit service data due to long residence on a control channel. Through adoption the method of invention, head vehicles of different vehicle teams are divided by priority, so that the head vehicles compete for the channel with different transmitting probabilities, at the same time, the transmitting probabilities also can be dynamically adjusted based on specific content of security warning message, so as to achieve the optimal overall performance and the maximum throughput of a system on the precondition of giving priority to urgent message.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Method for video compression based on line clipping
ActiveCN103763562AGood effectIntegrity guaranteedDigital video signal modificationTime domainComputer graphics (images)
The invention belongs to the technical field of video compression, in particular to a method for video compression based on line clipping. Video compression indicates that compression is conducted on a video in terms of time, details in the original video are described as many as possible in a short time, redundant information on a video time domain is removed, and therefore the capacity for rapidly browsing an endless surveillance video is given to a user. According to the method, video Tubes are clipped through line clipping so that the length of the video in the time domain can be reduced; in the clipping process, an energy image of the video Tubes is updated through a light stream and according to an analysis result of the energy image of the video Tubes, a clipping stopping criterion is set, so that according to each Tube, on the premise that the consistency of the video is guaranteed, the lasting time of each video Tube is compressed as much as possible, and finally the effective video compression effect is obtained. An experimental result shows that on the basis that object movement description is well kept, compression of the video in the time domain can be effectively achieved.
Owner:FUDAN UNIV
Video progress adjusting method and device and electronic equipment
ActiveCN113423009AReduce the number of video framesImprove decoding speedSelective content distributionEngineeringReal-time computing
The invention provides a video progress adjusting method and device and electronic equipment. The method comprises the steps of obtaining a progress adjusting event for a current video, and enabling the progress adjusting event to be used for positioning a target video frame of the current video; determining a target interval where the target video frame is located; and if the current decoded video frame is located in the target interval, executing a first operation for determining a decoding result of the target video frame on the basis of the current decoding result, and displaying the decoding result corresponding to the first operation. According to the video progress adjusting method and device and the electronic equipment provided by the embodiment of the invention, the first operation can be directly executed on the basis of the decoding result of the current decoded video frame without sequentially decoding the previous key frame of the target video frame to the target video frame, so that the decoding result of the target video frame can be quickly obtained, the number of decoded frames is reduced, and the decoding speed is improved. Compared with a traditional rapid positioning method, the method can decode the target video frame and accurately display the decoding result.
Owner:北京拓课网络科技有限公司
Dial data management method and device, wearable equipment and storage medium
ActiveCN112702143AIncrease usageReduce the number of framesError prevention/detection by using return channelEncryption apparatus with shift registers/memoriesData packEngineering
The invention discloses a dial data management method and device, wearable equipment and a storage medium, and is applied to the wearable equipment, and the dial data management method comprises the steps: obtaining an MTU value of a mobile terminal, and determining the maximum length of link layer data according to the MTU value; determining the length of a data packet according to the maximum length of the link layer data; and transmitting the dial data to be transmitted in the application program according to the length of the data packet. The maximum length of the link layer data is determined according to the MTU value, the number of frames of data transmission can be reduced, and the length of the data packet is determined according to the maximum length of the link layer data, so that full load of data transmission can be achieved; the to-be-transmitted dial plate data in the application program is transmitted under the transmission condition that the data transmission reaches the full load by reducing the frame number of the data transmission, so that the data transmission rate is effectively improved, and the utilization rate of the dial plate in the BLE wearable equipment is improved.
Owner:GEER TECH CO LTD
Method and system for data transmission
InactiveCN1592139ARealize power saving measurementEfficient use ofNear-field transmissionSynchronisation arrangementNetwork packetBluetooth
The invention relates to a method for data transmission, in particular on the basis of the Bluetooth standard, in which data packets can be interchanged by radio by means of a timeslot method, in which communication channels are set up between a master subscriber and at least one slave subscriber, at least two communication channels are operated with reduced activity in a first operating mode, such that the data interchange takes place periodically during first time slots which are then followed by second time slots during which no data interchange is intended, a first communication channel, which can be operated in the first operating mode, is synchronized to at least one second communication channel which can be operated in the first operating mode. The invention also relates to a data transmission system which operates on the basis of the Bluetooth method, in particular for carrying out the method according to the invention.
Owner:INTEL MOBILE COMM GMBH
Short leading and trailing frames to improve image quality in positron emission tomography (PET)
PendingCN111479508ACost effectiveImprove image qualityReconstruction from projectionComputerised tomographsImaging qualityPet imaging
A non-transitory computer-readable medium storing instructions readable and executable by a workstation (18) including at least one electronic processor (20) to perform an image reconstruction method(100). The method includes: receiving a surview image of a target anatomy acquired by an image acquisition device (12); selecting an axial field of view (FOV) of an imaging volume using the received surview image; optimizing axial boundaries of leading and trailing frames respective to the selected axial FOV of the imaging volume; operating a positron emission tomography (PET) imaging device (14)to acquire PET imaging data including acquiring PET imaging data for the leading frame followed by acquiring PET imaging data for the imaging volume followed by acquiring PET imaging data for the trailing frame; and reconstructing the PET imaging data to generate an image of the selected imaging volume including out-of-axial FOV scatter correction performed using the PET imaging data acquired forat least one of the leading and trailing frames.
Owner:KONINKLJIJKE PHILIPS NV
A method and device for encoding and decoding multi-dimensional video data
ActiveCN107948628BGuaranteed clarityReduce the number of framesDigital video signal modificationSteroscopic systemsDecoding methodsTransfer procedure
The embodiments of the application provide encoding and decoding methods and devices for multidimensional video data. The encoding method includes the following steps: detecting the current network transmission parameters during the transmission of multidimensional video data, wherein the multidimensional video data includes M frames of original image data at the same time point; determining the number of images N according to the network transmission parameters; extracting N frames of original image data from the M frames of original image data according to the number of images N; and encoding the N frames of original image data to obtain N frames of target image data. Through the embodiments of the invention, the number of frames of original image data can be appropriately reduced according to the actual transmission situation, and thus, the occupation of bandwidth is reduced. In addition, as the occupation of bandwidth is reduced, the original image data can be encoded at a high bitrate, there is no need to encode the original image data at a low bit rate because of bandwidth limitation, and the resolution of multidimensional video data is ensured.
Owner:ALIBABA GRP HLDG LTD
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