57results about How to "Reduce the number of frames" patented technology

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.

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.

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.

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.

The invention discloses a video-based human body behavior recognition method, apparatus and device, and a storage medium, and relates to the technical field of human body recognition. According to thespecific implementation scheme, a human body frame of each video frame of a to-be-identified video is acquired, each human body frame comprises a plurality of human body key points, and each human body key point has a key point feature; constructing a feature matrix according to the human body frame of each video frame; convolution is carried out on the feature matrix in the dimension of the number of video frames to obtain a first convolution result, and convolution is carried out on the feature matrix in the dimension of the number of key points to obtain a second convolution result; and inputting the first convolution result and the second convolution result into a preset classification model to obtain a human body behavior category of the to-be-identified video. The relation between the video frames of the front and rear frames is considered, the understanding deviation of the video can be reduced, and the accuracy and recall rate of the human body behavior category of the video are improved.

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.

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.

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.

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.

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.

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.

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.

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.