Abstract: Embodiments of the present application provide an automatic focusing method and a PTZ camera. The method is applicable to the PTZ camera and comprises: calculating a current target object distance from a lens of the PTZ camera to a monitored target monitoring plane based on a pre-established spatial object distance parameter; wherein, the spatial object distance parameter contains a spatial plane equation of a reference monitoring plane; the reference monitoring plane is an equivalent plane of the target monitoring plane; searching in a preset relation table based on the current target object distance, a current magnification of the PTZ camera, determining a position information corresponding to a focus motor of the PTZ camera, the preset relation table including the relationship of the object distance, the magnification and the position information of the focus motor, and driving the focus motor to a position corresponding to the determined position information.

Abstract: The present application provides a video encoding method, decoding method and devices thereof. The video encoding device includes a video capturing unit for capturing a video image; a processing unit for performing compression encoding on a background image in the video image to obtain video compression data and for structuralizing a foreground moving object in the video image to obtain foreground object metadata; a data transmission unit for transmitting the video compression data and the foreground object metadata, wherein the foreground object metadata is data that stores video structuralized semantic information. In the case that the moving objects are large in quantity or in size, the amount of video data can be effectively reduced and the limitation of network bandwidth during transmission can be mitigated.

Abstract: Embodiments of the present application disclose an optical axis adjusting mechanism and a camera. The optical axis adjusting mechanism includes a first adjusting plate (2) and a second adjusting plate (3), wherein the first adjusting plate (2) and the second adjusting plate (3) are located outside the imaging unit housing (4). In embodiments of the present application, the first adjusting plate and the second adjusting plate are provided for adjusting a direction of an optical axis of an optical device provided in an imaging unit housing, and the first adjusting plate and the second adjusting plate are located outside the imaging unit housing, so that it is more convenient to installation and adjustment.

Abstract: A data cloud storage system, client terminal, storage server and application method, wherein the data storage method includes: sending a storage server query request to a scheduling management service center; receiving and caching first address information when the scheduling management service center is under normal operation, and selecting first address information from the cached first address information; sending a resource request to a storage server corresponding to the first address information; such that the storage server allocates a storage unit for the target data and generates storage resource information; sending a data storage request to the storage server, such that the storage server generates data index information based on attribute information of the target data, and storing the target data in the storage unit allocated to the target data.

Abstract: The present application discloses a camera and an integrated circuit board. The camera includes: an integrated circuit board and a plurality of image sensor boards, wherein an image sensor is mounted on each of the image sensor boards; the plurality of image sensor boards are configured for outputting acquired first image signals to the integrated circuit board; and the integrated circuit board is connected with the plurality of image sensor boards and configured for performing stitching and encoding processing on the first image signals. The present application solves the technical problem that it is difficult for camera equipment provided in the prior art to achieve panoramic shooting.

Abstract: An isolated waterproof cable for a wire and an electrical device provided with the same are disclosed. The isolated waterproof cable for a wire includes: a wire body (11) including at least one core wire (110), each core wire includes a conductive wire (113) and an insulating sheath (112) provided outside the conductive wire (113); a seal provided at an end of the wire body (11); and at least one connector (12) connected with the conductive wire (113), and a segment of the connector (12) or the conductive wire (113) is sealed within the seal. The isolated waterproof cable for a wire provided by the embodiments of the present application prevents water vapor from flowing along the conductive wire and entering the electric device by sealing a segment of the connector or the conductive wire, thereby providing good waterproof performance, for example, the camera fogging problem can be well solved.

Abstract: Systems, devices and methods are provided for video encoding. For example, video data is encoded based at least in part on a preset encoding algorithm to obtain a video encoding stream that comprises a plurality of coding frames. A stream tag is added for the video encoding stream, and a frame tag is added for each coding frame in the video encoding stream. The stream tag includes information characterizing whether the stream tag is added into the video encoding stream. The frame tag includes type information of the coding frame.

Abstract: The present application discloses a storage device and a block storage method based on the storage device, wherein disk space of the storage device includes a data area having a plurality of end-to-end adjacent data block units, each of which includes a metadata block and a data block adjacent to each other; wherein the data block with a first preset capacity is configured to store target data, and the metadata block with a second preset capacity is configured to store information of the target data. With the storage device, metadata is stored in a distributed manner, wherein each of the metadata blocks and the data blocks are stored as a whole. The address offset of updating metadata after writing data is thus reduced, and the metadata update efficiency, as well as the overall storage performance of the storage device are improved.

Abstract: Systems, devices and methods are provided for video encoding and decoding. An example method includes: analyzing one or more input images; obtaining a background image from the one or more input images; encoding the background image to obtain a background frame; decoding the background frame to obtain a reconstructed image of the background frame; obtaining a first image from the one or more input images; encoding at least partially the first image to obtain a refreshment frame based at least in part on a difference between the first image and the reconstructed image of the background frame; obtaining a second image from the one or more input images; encoding at least partially the second image to obtain a common frame; and generating a video bit stream based at least in part on the background frame, the refreshment frame and the common frame.

Abstract: The present application discloses a panoramic camera and a shooting method thereof, the panoramic camera includes: N sub-cameras, a synchronization control module, a stitching and correcting module, configured for caching successive m rows of pixel values in the shot image in a sliding window manner, and correcting the pixel values according to a preset correction table and the cached m-row pixel values, and sequentially outputting the corrected pixel values of each row, wherein m is greater than the sum of a preset maximum number of distortion rows and 2, and m is smaller than the total number of rows of the shot image; a stitching fusion module, configured for stitching the corrected images into a stitched image according to the overlapping portions of the images shot by the sub-cameras, wherein the images are shot synchronously by the sub-cameras under the control of the synchronization control module; and a transmission module.

Abstract: Embodiments of the present application provide a method, apparatus and system for processing data, the method is applicable to an electronic device, wherein the electronic device is connected to a memory card that has been formatted in a proprietary manner in advance and the memory card includes at least one cold data area. The method includes: obtaining the number CR of reads for data stored in a target cold data area C stored locally; determining whether the number CR of reads reaches a preset threshold TCR for reading failure of cold data; if the number CR of reads reaches a preset threshold TCR for reading failure of cold data, transmitting a start address and a end address of the data stored in the target cold data area C to a controller of the memory card, and initializing the number CR of reads for processing the stored data by the controller according to the start address and the end address.

Abstract: The disclosure discloses a video bit rate control method and a video coding device. The method includes: according to a pre-set first bit rate value and a code size generated in a previous period of time, a first quantization parameter is generated (S1); according to a pre-set second bit rate value and the code size generated in the previous period of time, a second quantization parameter is generated (S2); the first quantization parameter is composed with the second quantization parameter (S3); if the first quantization parameter is greater than or equal to the second quantization parameter, an image frame in a current period of time is coded by using the first quantization parameter (S4); and if the first quantization parameter is less than the second quantization parameter, the image frame in the current period of time is coded by using the second quantization parameter (S5).

Abstract: A method, a server and a system for calculating bandwidth of UDP-based streaming media network transmission. The method includes: dividing video frame data to be sent into a plurality of sub-video frame packets, sending a sub-video frame packet with a preset serial number to a client, and receiving a response message sent by the client, wherein the response message includes a first serial number and a second serial number; sending a sub-video frame packet corresponding to the first serial number to the client, and determining whether the client has received all sub-video frame packets of the video frame data; if so, accurately calculating the actual bandwidth of the current network based on the sending start time of the first sub-video frame packet of the video frame data, the sending end time of the last sub-video frame packet of the video frame data and the size of the video frame data, which provides a basis for the self-adaption of the encoding rate.

Abstract: Embodiments of the present application provide a regional surveillance and alarming system and an alarming method. In the embodiment of the present application, each security region is provided with a control device having stored thereon an association table in which associated objects of a security region where the control device is located when this security region is taken as the first target object are recorded, and the associated objects may be a detection device or other target objects. When a change of the state of the detection device or the target object satisfies the alarm output triggering condition, the control device may issue an alarm. As such, a real-time surveillance and alarming of illegal events may be allowed.