Abstract: The present application discloses a method and a device for image stitching. The method includes: obtaining a first image acquired by a first camera and a second image acquired by a second camera, wherein the first image is an image with visible light information, the second image is an image including depth information and visible light information, the first camera and the second camera are disposed adjacent to each other, and there is an overlapping area between the acquired first image and second image; mapping pixels in the second image to the overlapping area and/or an extended area, wherein the extended area is an image area formed by pixels in the second image which are mapped to the outside of the first image; stitching the mapped pixels in the second image to the overlapping area and/or the extended area based on depth information and visible light information of the pixels in the second image to obtain a stitched image.

Abstract: Disclosed is a back focus adjustment mechanism and a camera provided with the same. The back focus adjustment mechanism comprises a driving device (10) and a positioning and guiding device (20) separately provided, wherein the positioning and guiding device (20) comprises a positioning assembly (21) and a guiding assembly (22), the guiding assembly (22) is mounted on the positioning assembly (21), and the driving device (10) is in driving connection with the guiding assembly (22) to drive the guiding assembly (22) to move. In the back focus adjustment mechanism and a camera provided with the same, after the driving device (10) and the positioning and guiding device (20) are separately provided, each structure of the back focus adjustment mechanism can be simpler, and the reliability of each structure of the back focus adjustment mechanism can be increased under the same processing precision.

Abstract: A bit rate control method device obtains a bit rate control mode and coding control parameters of a current short period in a long period, determines a frame-level coding parameter of the current short period, and transmits the frame-level coding parameter to an encoder. Second bit stream information is obtained and statistical analysis is performed which includes complexity information of the current video frame, the number of the encoded bits in the current short period, and coding quality information of the current short period, so as to encode a video frame of the next, adjacent short period by calculating a frame-level coding parameter of the next, adjacent short period. By the present solution, the storage space is allocated reasonably under the condition that the image satisfies a certain quality.

Abstract: The present application discloses a spherical camera, including a base, a rotation assembly, a sphere locking frame, a sphere and a sphere cover, wherein the sphere cover is connected to the base through the rotation assembly, and is rotatable relative to the base in a direction parallel to a supporting surface of the base; the sphere is hinged in the sphere cover and is rotatable in a direction perpendicular to the supporting surface; the sphere locking frame is provided on the rotation assembly and an elastic damping member is provided between the sphere and the sphere locking frame. The above solutions can solve the problem that the sphere of the current spherical camera can be easily damaged due to direct contact with the cover during a rotation process.

Abstract: A method for obtaining a combined depth map, and a depth camera. The method is applicable to a processor in the depth camera. The depth camera includes the processor, at least one light emitting element, and at least two time-of-flight (ToF) sensors, and the composite irradiation range of the at least one light emitting element convers the composite field of view of the at least two ToF sensors. The light emitting elements in the depth camera modulate light signals with the same modulation signal and then transmit the modulated light signals; the ToF sensors demodulate, by using same demodulation signal corresponding to the modulation signal, the received modulated light signal reflected back by an object, so as to generate depth data; and the processor performs data fusion processing on all the received depth data, so as to obtain a combined depth map.

Abstract: The application provides a network time correction method and apparatus.

Abstract: Embodiments of the present application provide a method and apparatus for playing a video. The method includes: obtaining video information of each of moving objects contained in a currently played video frame image; updating a pre-created moving object pool based on the obtained video information of each of the moving objects; extracting, from the moving object pool, a size of a forefront moving object in the moving object pool and a position of the forefront moving object in the video frame image, obtaining a first sub-image containing the forefront moving object from the video frame image, and displaying the first sub-image in a first window; and sequentially obtaining second sub-images surrounding the forefront moving object from a cruising region of the video frame image, and displaying the second sub-images in a second window sequentially.

Abstract: The present application provides a multimedia data transmission method and device, wherein the method comprises: a first transmission device located in a first network obtaining a multimedia file descriptor and a multimedia file to be transmitted which have a correspondence, wherein the multimedia file descriptor and the multimedia file are stored in different memories; the first transmission device encoding content of the multimedia file descriptor and content of the multimedia file into a multimedia transmission file in a first format according to a predetermined rule; the first transmission device sending the multimedia transmission file to a second transmission located in a second network. With the present application, the problem that multimedia data cannot be transmitted synchronously during ferrying in related arts is solved and the security and confidentiality of multimedia data transmission is ensured while the multimedia data is transmitted synchronously.

Abstract: The present application discloses a method and a device for searching a target in an image. The search method includes: locating a target in an image to be searched (S101); classifying the target and extracting a local feature of the target to generate a local feature code of the local feature (S102); searching an image database for suspected images of the same classification as the target through a tree classification index structure, comparing pre-stored local feature codes of the suspected images with the local feature code of the target, and outputting a suspected image with a similarity larger than a first threshold (S103).

Abstract: Disclosed is a method and device for transmitting video data. The method includes allocating a traffic to each piece of data to be transmitted at interval of a preset duration, and when a traffic that needs to be used by the data to be transmitted is larger than the traffic allocated to it, transmitting a part of the data to be transmitted using this allocated traffic, and transmitting the remaining data after a next traffic allocation is performed. By allocating traffic, the traffic for transmission can be controlled, thereby reducing possibility of network congestion caused by relatively large bandwidth being used for transmitting video resources. If the traffic that needs to be used by the data to be transmitted is larger than the traffic allocated to it, only part of the data is transmitted, and the remaining of the data will not be transmitted until traffic is allocated again.

Abstract: The present application relates to a panorama stitching camera, including: a base provided with a fixing plate; a main shaft passing vertically through the fixing plate; and a plurality of lenses disposed at one end of the main shaft, wherein, a limiting protrusion and a shaft end retaining ring that abut respectively against two opposite sides of the fixing plate are disposed at the other end of the main shaft. When the angle of view of the panorama stitching camera is being adjusted, the plurality of lenses can rotate around the axis of the main shaft simply by rotation of the main shaft. Thus, the adjustment of the angle of view of the lens along the circumferential direction of the main shaft is achieved, and the operation of adjusting the angle of view of the panorama stitching camera is greatly simplified. Thus, the problem that the angle of view of an existing panorama stitching camera cannot be adjusted readily during use is solved.

Abstract: A file storage method and device are provided. The method includes: receiving a storage request for a to-be-stored file (S101); determining a target key for storing the to-be-stored file (S102); obtaining to-be-stored metadata of the to-be-stored file according to the determined target key (S103), wherein the to-be-stored metadata includes: fixed sub-metadata and variable sub-metadata; and storing the to-be-stored metadata in a metadata database, storing the fixed sub-metadata in a name of the determined target key, storing the variable sub-metadata in a preset storage area corresponding to the determined target key, and storing the to-be-stored file in a value of the determined target key (S104). By applying the file storage and device, the recovery of metadata is effectively ensured, while a storage space of a storage terminal is saved.

Abstract: A method and a device for adjusting a 3D model are disclosed. The method includes: fusing a 2D video and a 3D model of a target monitored area to generate a mesh model (S101); determining whether each set plane in the mesh model is even based on the location of a respective reference plane in the 3D model (S102); for each set plane that is uneven, referred to as a target set plane, selecting an uneven point in the target set plane as a mark point (S103), and generating a virtual plane based on the mark point and the reference plane corresponding to the target set plane (S104); and adding the virtual plane to the 3D model, and for the 2D video, saving the 3D model in which the virtual plane is added (S105). With the embodiments of the present application, operations for the uneven planes improve the effect of the fusion of a video and a 3D model. There is no need to modify a 3D scene model, which reduces the labor cost and time cost of modifying the 3D scene model.

Abstract: Embodiments of the present application disclose a video playback method and apparatus, which relate to the field of video communication technologies. The method includes: receiving a data obtaining request for a video to be played back sent by a client; estimating a current data transmission speed according to historical data transmission speeds; selecting a target video frame discarding scheme from preset video frame discarding schemes, according to the current data transmission speed and a theoretical data transmission speed corresponding to a preset video frame discarding scheme, wherein the theoretical data transmission speed is determined according to the multiplied speed for video playback; and performing discard processing on video data of the video to be played back according to the target video frame discarding scheme, and sending to the client the video data that has been subjected to the discard processing, so that the client plays back the video to be played back.

Abstract: When performing an inter predictive encoding on any image frame x is required, a reference image frame is determined for image x; image x is a P-frame image or a B-frame image; for each reference image frame, following processes are respectively performed: whether resolution of a reference image frame is the same as resolution of image x is determined; if resolution of the reference image frame is different from resolution of image x, resolution of reference image frame is adjusted to be the same as resolution of image x; if resolution of each reference image frame is the same as resolution of image x, inter predictive encoding is performed on image x based on each reference image frame.