355 results about "High-motion" patented technology

An object in a video sequence of frames is tracked by object masks generated for frames in the sequence. Macroblocks are motion compensated. Blocks matching entirely within a prior-frame object mask are used to generate an average object motion. When the average motion is below a motion threshold, frames are skipped at larger intervals, but more frequent frames are processed when high motion occurs. When the macroblock best matches a prior-frame block that has the object's boundary passing through the block, the macroblock is uncertain and is sub-divided into smaller sub-blocks that are again motion compensated. Sub-blocks matching blocks within the object mask in the base frame are added to the new object mask for the current frame while sub-blocks matching a block containing the object boundary are uncertain and can again be sub-divided to further refine the object boundary. Frame skipping and adaptive-size blocks on the object boundary reduce computational load.

The invention discloses a direct driving type precise rotating table which comprises a working table (30) and a torque motor, wherein the torque motor comprises a motor shell (8), a main shaft (2), a stator (6) and a rotor (7), the motor shell (8) is fixedly connected with the stator (6) to form a static part, the main shaft (2) is fixedly connected with the rotor (7) to form a rotating part, and the working table (30) is directly and fixedly connected with the main shaft (2) of the torque motor. Furthermore, a circular arc crossing roller bearing (1) is arranged between the motor shell (8) and the main shaft (2) and comprises an inner ring (21), two outer rings (22) and a plurality of circular arc rollers (23) arranged among of the inner ring (21) and the outer rings (22), and the circular arc rollers (23) are sequentially crossed in an angle of 90 DEG. The invention has high radial and axial load capacity, good rigidity and high motion precision and stability, and can meet the integrated requirements of serving as a high-precision digital control rotating table.

A digital camera capable of variably setting a frame rate may include an imaging device which outputs a plurality of temporally continuous image frames when photographing a moving image. The digital camera may also include a digital signal processor that determines a frame rate with which the image frames are filed, wherein the digital signal processor variably determines the frame rate according to a motion speed of a subject in the frames. The digital camera may further include a recording medium in which the filed image frames are stored. Accordingly, as the frame rate is varied according to the motion of a subject, the motion of the subject can be smoothly realized in a high motion speed section from a reproduction perspective, and substantially repeated image frames can be removed in a low speed motion section. Thus, the size of moving image files can be reduced, saving memory resources.

The embodiment of the invention provides a coding method and device of space-time signals. The method comprises following steps of collecting the space-time signals of each partial space location in a monitoring area; accumulating the space-time signals according to time, thus obtaining a signal accumulated strength value; transforming the signal accumulated strength value through a filter; when the transforming result exceeds a specific threshold value, outputting pulse signals; successively arranging the pulse signals corresponding to the partial space locations into sequences according to the time, thus obtaining pulse sequences for expressing partial space location signals and the changing processes of the partial space location signals; arranging the pulse sequences of all partial space locations into a pulse sequence array according to space location interrelations; and taking the pulse sequence array as the code of dynamic space-time signals of the monitoring area. According to the embodiment of the invention, through carrying out pulse type coding in a time domain and then carrying out space domain coding according to the space locations, the time domain and space domain information is reserved sufficiently; the static image at a random moment can be reconstructed; and the fine moving process of a high speed moving scene is reserved.

The invention relates to the technical field of robots, and provides a human-simulated mechanical hand. The human-simulated mechanical hand comprises a mechanical arm and a mechanical gripper which are connected to each other, wherein the mechanical arm comprises a large arm and a small arm; a shoulder pitching joint, a shoulder yaw joint and a shoulder rolling joint which are connected to a shoulder are arranged on the large arm; an elbow pitching joint and an elbow rolling joint which are connected to the large arm are arranged on the small arm; and a wrist yaw joint connected to the small arm is arranged on the mechanical gripper. According to the human-simulated mechanical hand provided by the scheme, the three joints on the large arm realize bionics design of a spherical joint at a joint of the arm and the shoulder; the bionics design of the elbow joints of the arm is realized by the two joints of the small arm; and one joint on the mechanical arm realizes the bionics design on a hand. The human-simulated mechanical hand has a relatively high motion space and relatively high motion flexibility, and can replace people to complete special work which is not liable to complete; and an operator conveniently controls according to intuition and experience, so that control efficiency and accuracy can be improved.

The invention discloses an amphibious bionic turtle robot, which has two leg module unites with the same structure and 16 independent controllable joints, can move both on land and underwater through redundant actuation and has high environmental adaptability. In the on-land gait of the robot, hip joints, pitch joints and knee joints serve as actuation joints, and rotating joints are redundant; while in the underwater gait of the robot, the hip joints, the pitch joints and the rotating joints serve as the actuation joints, and the knee joints are redundant. The robot is also equipped with a buoyancy adjusting mechanism which can control the vehicle to float up and dive in water freely. The dynamic system and control system of the robot system are arranged in a sealed cabin of the vehicle body to be protected, and the waterproof sealing of key parts is realized by using a method of oil immersed sealing or sealing adhesive application at joints. The robot has the advantages of rich motion modes, high carrying capacity, large joint rotation angle, high mobility, high flexibility and the like. In different environments, every specific motion mode has high motion efficiency, so the robot can adapt to various medium environments.

A process of bit rate control includes asymmetrical reactions to changes in the signal density of the digital video signals. In the process, two different averaging periods are employed to meet a long term bit rate target and to achieve a short term quick reaction. When encoding a motion picture, the bit rate control is relaxed during high motion scenes to allow high peaks of bit rate at those points. The coding process reacts slowly to transitions from low to high motion sequences to preserve the best overall video quality, and reacts quickly to transitions from high to low motion sequences to enhance the image quality.

The invention relates to a novel four-footed walker having a parallel leg structure, which comprises a frame and four parallel legs having same structures, wherein the four parallel legs are mounted under the frame; each of the four parallel legs comprises a leg frame, three linear drivers, three connecting elements, a T-shaped leg and a foot part; a single parallel leg is provided with three branches; during a practical operation, the foot part does a space motion under the driving of the collaborative operation of the three linear drivers; the foot part is in buffering connection and can beused for finishing the processes of buffering, storing energy and recycling within a walking period; the four legs are symmetrically arranged or are arranged along a same direction; and an omni-directional motion of a robot can be realized through a certain tread of the four legs. The novel four-footed walker has the advantages of simple structure, easiness in control, high motion precision, high-speed response capability and high bearing capacity. The novel four-footed walker is suitable for a high-speed and high-load transportation operation and a dangerous circumstance operation under an outdoor complex unstructured terrain condition.

Cameras may monitor its operation and automatically switch between operation modes thereby to best capture users' experiences. Auxiliary sensor data collected by the one or more sensors and/or captured image data may be analyzed to determine when a camera should switch to a different operation mode. The auxiliary sensor data and/or the content of the captured images may include motion information indicating whether the camera or the captured scene has relatively high-motion, relatively low-motion, or no motion. Event(s) may be detected by analyzing the auxiliary sensor data and/or analyzing captured image data, and preferred operation mode(s) suitable for capturing the events can be determined. Each preferred operation mode may be associated with a confidence value. A camera may switch to a preferred operation mode for capturing an event if the event is determined with high confidence to take place at a time point.

To provide a display device capable of displaying a moving picture with high definition and at high speed. An image display system includes: an image display unit; and a control unit. The control unit has: a block discrimination circuit portion; an image processing portion; a storage portion; and a synchronizing signal generation portion. The block discrimination circuit portion discriminates a moving picture or a still picture to process the image information in accordance with the discriminated result, in which the number of gradations for the image information processed when the discriminated result is the moving picture is lower than when the discriminated result is the still picture. Thereby, the high definition image display and the high speed moving picture display can be effected by reducing the information with lower degree of recognition.

The invention relates to a self-adaptation mean-shift target tracking method based on optical flow field estimation. Aiming to solve the problem that the tracking fails due to high motion speed of the target or obvious scale variation and shielding of the target during target tracking of the mean-drift shift algorithm, a light stream method is introduced on the basis of a traditional mean-shift vector method, feature points are searched on the target, the centre position and size of a window are modified and tracked based on the variation information of the feature point, and more accurate length and width of the window can be obtained through self-adaptation by a Bhattacharyya coefficient bisection method. The area of the object shielded by a stationary object can be observed through aberration analysis, and the object can be recaptured by using the Bhattacharyya coefficient.

The invention discloses a space target high resolution imaging method based on a high resolution range profile (HRRP) sequence. The space target high resolution imaging method includes a first step of recording inverse synthetic aperture radar (ISAR) echo through a radar, a second step of obtaining high-speed motion compensation, a third step of obtaining high quality HRRP, a fourth step of carrying out scattering point flight path correlation, and a fifth step of achieving high resolution imaging. Firstly, through sparse signal reconstruction, the high quality HRRP sequence can be obtained, then an effective flight path correlation method is adopted to generate a scattering point flight path matrix in the HRRP sequence, and further, through matrix decomposition with a constraint condition, the high resolution imaging can be achieved. The method overcomes the defects that a transforming method based on subsection false Keystone is high in requirements for pulse repetition frequency (PRF), strict in requirements for a target motion model, big in difficulty in accurate translation compensation and phase correction to a high-speed rotating target in the imaging process, big in the amount of calculation and the like, and has the advantages of being capable of carrying out high resolution imaging on the conditions of low PRF and even direction Doppler blur, and having universality to the target motion model, being free from translation compensation, high in efficiency, good in image focusing, and the like.

The invention provides a CMOS (Complementary Metal Oxide Semiconductor) image sensor which comprises a photodiode, a bimodule read-out circuit, a global shutter and an integrating circuit. According to the invention, the dynamic range and the shooting frame rate of the CMOS image sensor are improved through a circuit with simple logic control. Under the condition of stronger ambient light, reading is performed in a PPS (Passive Pixel Sensor) mode, and electric charge is read directly without magnification, however, under the condition of poor ambient light, reading is performed in a C-APS (Active Pixel Sensor) mode, and variable gain reading is realized through different offsets, therefore, the dynamic range of the CMOS image sensor can be increased greatly; and the global shutter can enable all pixels to sense light simultaneously, so that the shooting frame rate is improved greatly, and the capability of shooting objects moving at high speed can be realized.

A streaming video or a stored video is analyzed to identify salient features. The salient features are the more interesting portions of the video because salient features include the most motion. A motion vector field including a motion vector for multiple pixels in the video is generated. The motion vector field is partitioned into grid blocks, and each of the grid blocks is divided into a set of orientation ranges. The vectors of the motion vector field for each grid block are binned into the orientation ranges. A motion score is calculated based on a count of motion vectors for the orientation ranges. The section of the video having higher or the highest motion score is designated as a salient feature. Among other applications, salient features may be used for thumbnail images, highlight reels, or video editing.

The invention relates to a robot body modularization linkage device for a single-drive multi-legged robot. The device comprises a main frame, double parallelogram linkage mechanisms, hip mechanisms, grippers, a connecting frame, a crank, a power drive rod and a motor; both the parallelogram linkage mechanisms are arranged at both the sides of the main frame; the hip mechanisms are connected with the parallelogram linkage mechanisms by the grippers; double the parallelogram linkage mechanisms are connected by the connecting frame or the crank; the motor is connected with the crank by the power drive rod; and the motor drives the power drive rod to rotate, the power drive rod drives the crank or the connecting frame to rotate, the crank drives both the parallelogram linkage mechanisms to reciprocate and the reciprocating motion of both the parallelogram linkage mechanisms drives each hip mechanism to alternately move back and forth by the grippers. Compared with the prior art, the robot body modularization linkage device for the single-drive multi-legged robot has the advantages of simple structure, optimization for foot end tracks, high motion reliability and stability and the like.

Systems and methods that facilitate an efficient and effective multi-view hybrid system for high-speed motion analysis are presented. The multi-view hybrid system can include a mix of relatively few high-speed cameras (e.g., 1000 fps, etc.) and a greater number of regular-speed cameras (e.g., 30 fps, etc.) that are utilized to provide more high speed views than high speed cameras included in the system. The new multi-view hybrid approach exploits spatial-temporal coherence in sampled images from both the regular-speed cameras and high-speed cameras to increase the number of high speed motion viewpoints. In one embodiment, the high-speed motion captured from one or a few high-speed cameras is “transferred” to other viewpoints to create a set of virtual high-speed camera viewpoints that provide the ability to obtain high-speed motion information (e.g., synthesized image frame sequences) from multiple viewpoints in addition to viewpoints of the physical high speed cameras in the system.

A multi-dimensional parallel mechanism vibrating table which relates to middle, small type mechanical vibration measuring field includes a multi-freedom parallel mechanism composed of 3~6 branch chains, a moving platform and a static platform, each branch chain can select one or several motion pairs from revolute pair, shifting pair, column pair, sphere pair or helix pair which are connected by connecting bars therebetween, axes configuration between the motion pairs can be coincident, parallel, upright, intersected or coplane, one end of each branch chain is connected with the moving platform, while another is connected with the static platform. The invention is capable of outputting arbitrary waveform with simple structure, low costs, great firmness, high motion precision and convenience for control.