Abstract: Embodiments of application discloses a method and device for determining external parameters of a stereo camera. The method comprises: acquiring ground surface data of a location of the stereo camera; generating, according to three-dimensional coordinates of each pixel in the ground surface data in a camera coordinate system corresponding to the stereo camera, a first plane equation in the camera coordinate system that conforms to the three-dimensional coordinates of the pixels; determining, according to a distance between the origin of the camera coordinate system and the ground surface, a setting height of the stereo camera; and generating, according to the first plane equation, a plane normal vector corresponding to the first plane equation; and determining, according to the plane normal vector, a pitch angle of the stereo camera and an inclination angle of the stereo camera. The external parameters of the stereo camera can be determined without using a reference point in a scene.

Abstract: Embodiments of the present application provide a method and apparatus for generating a panoramic image. The method includes: determining, according to a pre-established mapping relationship, a pixel point in the two-dimensional planar image to which each of grid points in a preset stereoscopic model is mapped, wherein multiple grid points form one grid plane and accordingly, multiple pixel points to which the multiple grid points are mapped form one pixel region; and rendering each of the grid planes by the pixel region corresponding to this grid plane, to obtain a panoramic image. In the solution of the present application, it is not necessary to generate a distortion-corrected image and an overhead image, thereby saving storage resources.

Abstract: Embodiments of the present application provide a character recognition method and device. The method includes obtaining a target image to be analyzed which contains a character (S101); inputting the target image into a pre-trained deep neural network to determine a feature map corresponding to a character region of the target image (S102); and performing character recognition on the feature map corresponding to the character region by the deep neural network to obtain the character contained in the target image (S103). The deep neural network is obtained by training with sample images, a result of labeling character regions in the sample images, and characters contained in the sample images. The method can improve the accuracy of character recognition.

Abstract: The present application discloses a long-distance transmission method for an Ethernet switch including a network switching module, an MCU module and a dial code module. The MCU module is connected to the network switching module and the dial code module. The dial code module is configured for providing two configuration inputs for a normal mode and a long-distance mode for user equipment. The MCU module is configured for monitoring a configuration input state of the dial code module in real time. When detecting that the dial code module is in the configuration input for the normal mode, the MCU module configures a network port of the network switching module to be in a self-negotiation mode.

Abstract: Disclosed are data storage, data reading, and data cleaning methods and devices, and a cloud storage system. Storage blocks of storage nodes are grouped into resource pools. A method can include: for each resource pool, determining a first number of occupied storage blocks in the resource pool (S401); determining whether the first number meets a preset data cleaning condition (S402); if so, sending a data cleaning instruction to a storage node where each occupied second storage block in the resource pool is located, such that the storage node cleans the data stored on the second storage block in the storage node (S403). That is to say, the management node determines the number of occupied storage blocks of a resource pool. When the number meets a preset data cleaning condition, the data in the storage block is cleaned. Such a process is simple, reducing the workload of management node.

Abstract: The present application discloses a vehicle monitoring method and apparatus, processor, and image acquisition device. The method includes: identifying a vehicle window area image in a vehicle image obtained through monitoring; performing feature identification on the vehicle window area image to obtain an identification result of a target feature; performing human eye sensory processing on the vehicle image and the vehicle window area image respectively, and stitching the processed vehicle image and the processed vehicle window area image to obtain a processed image; and outputting the identification result of the target feature and the processed image. The present application solves the technical problem of relatively low identification rate in vehicle monitoring by image detection.

Abstract: Disclosed is a power control method applicable to a power over Ethernet system, which includes: when it is determined that there is a target powered device connected to the power over Ethernet system, calculating a sum of actual power of all powered devices currently powered on to obtain a total required power; and determining whether the total required power exceeds a preset second threshold power threshold, if yes, powering off a powered device that is currently powered on according to priorities corresponding to port numbers of all the powered devices that are currently powered on until the total required power is less than the second power threshold; if not, determining whether to power on the target powered device according to a preset first power threshold, wherein the second power threshold is greater than the first power threshold.

Abstract: A method and an apparatus for controlling an infrared lamp and a four-lens adjustable camera are provided. Aspects of the disclosure include determining, for each of a plurality of lenses of a four-lens adjustable camera, a brightness change rate between a picture captured by the lens when a first infrared lamp group is not turned on and a picture captured by the lens when the first infrared lamp group is turned on. Embodiments of the invention further include determining a lens with a largest brightness change rate among the plurality of lenses as a lens bound to the first infrared lamp group. Aspects of the present application improve the light compensation effect of the first infrared lamp group on the premise that the first infrared lamp group is fixed.

Abstract: Provided are a method and apparatus for fusion of a panoramic video to solve a problem that a panoramic video image formed by stitching is incomplete. The method includes: acquiring a panoramic video image (21); extracting a moving target from at least two cuboid three-dimensional images (22); performing image fusion processing on the panoramic video image and the moving target to form a panoramic video image incorporated with the moving target (23). Thereby, problems such as overlapping and disappearance of a moving target, in whole or in part, in a panoramic video image generated by adopting a cuboid three-dimensional model are solved, thereby ensuring the completeness of a panoramic video image and improving the quality of the panoramic video image.

Abstract: Embodiments of the present application disclose a method, device, system and server for acquiring and providing vehicle image data.

Abstract: The present application discloses a method and system for processing image signals, the method and system sensing visible light bands of optical signals in an area to be imaged, via a first imaging unit, to generate a first image signal, wherein the first image signal includes color information; sensing at least infrared bands of optical signals in the area to be imaged, via a second imaging unit, to generate a second image signal, wherein the second image signal includes illumination information; and synthesizing the first image signal and the second image signal to generate a synthesized image with color information and illumination information. The present application can generate a synthesized image with a variety of advantages, and can meet the two monitoring requirements in low illumination and haze environment which are focused in the field of security.

Abstract: The present disclosure discloses an image fusion method, device and system. The image fusion method comprises: obtaining a visible light image generated by a visible light sensor and an invisible light image generated by an invisible light sensor, wherein there is a correspondence between the visible light image and the invisible light image; synthesizing the visible light image and the invisible light image to create a first synthetic image; denoising the visible light image and the first synthetic image; and fusing the denoised visible light image and the denoised first synthetic image to generate a second synthetic image. In embodiments of the present disclosure, the visible light image and the first synthetic image that is fused with the invisible light image are denoised respectively before the final image fusion to denoising the fused image.

Abstract: The embodiments of the present application provides an image capture device, a control method and a machine readable storage medium, the image capture device includes: a processor, an infrared lamp, and a white light lamp. The processor in the image capture device is used to control the infrared lamp and white light lamp. Specifically, the processor obtains current acquisition parameters of the image capture device, compares the magnification in the current acquisition parameters with a preset first magnification threshold and a preset second magnification threshold to obtain a comparison result, and controls switching states of the infrared lamp and the white light lamp according to the comparison result, the brightness of the environment and the gain, wherein, the first magnification threshold is less than the second magnification threshold.

Abstract: A multi-lens camera and a lens adjustment device, the multi-lens camera includes a main housing assembly, lenses, and a lens adjustment device; the main housing assembly includes a main housing and an inner baffle arranged at the top opening of the main housing; the inner baffle and the main housing constitute a main board cavity; a main board is arranged in the main board cavity; the area of the main board is less than that of the main board cavity, the lenses are mounted on the lens adjustment device, and the overall area of the lenses and the lens adjustment device is within the area of the support region of the inner baffle; the lens adjustment device includes a cylindrical component and at least two lens brackets, the lenses are mounted on the lens brackets, which are connected with the component to drive the lenses to rotate around the component.

Abstract: Embodiments of the present application disclose a target detection method and device, and relate to the technical field of video processing.

Abstract: A multi-lens camera includes a main housing assembly, lenses, a lens adjuster and a transparent cover. The transparent cover is mounted on the main housing assembly; the lens adjuster is mounted in the space formed by the main housing assembly and the transparent cover; the transparent cover includes a flat portion and a curved portion surrounding the flat portion; the lenses are located in the space covered by the curved portion; the lens adjuster includes a fixing disc and at least two lens brackets; each of the lens brackets includes a first bracket and a second bracket arranged on the first bracket; the first support is movably arranged on the fixing disc, and is capable of moving along the circumferential direction of the fixing disc; a lens is rotationally engaged with the second bracket, such that the lens rotates around axis thereof.

Abstract: A method and apparatus for video playing, an electronic device and a storage medium are provided. In the method, a web service program calls a preset interface to create a video window; the video window is displayed in a page in which the current window of a browser is located; a video playing instruction is received; and a video corresponding to the video playing instruction is played in the video window. In the present application, a video window is created through a web service program; the created video window is displayed in the page in which the current window of the browser is located, and then the video is played through the video window. In this way, the video may be played without loading a plug-in, achieving the purpose of playing a video on a page of a browser without using a plug-in.

Abstract: A fingerprint input method, apparatus, system and an electronic device are provided. The method includes: obtaining a fingerprint as a current fingerprint (S101); comparing the current fingerprint with a fingerprint stored in a fingerprint database (S102); storing, when it is determined that there is no fingerprint identical with the current fingerprint in the fingerprint database, the current fingerprint in the fingerprint database. It can be seen that before storing the obtained current fingerprint into the fingerprint database, it is firstly determined whether there is a fingerprint identical with the current fingerprint in the fingerprint database, and when it is determined that there is no fingerprint identical with the current fingerprint in the fingerprint database, the current fingerprint is stored in the fingerprint database, to avoid the occurrence of duplicate fingerprints in the fingerprint database, avoid the input of the duplicate fingerprints, and improve the user experience.

Abstract: The present application provides a combined camera, comprising a first camera housing inside which a first camera is provided. One side of the first camera housing is provided with a rotating disc that is rotatable relative to the first camera housing; a rotating bracket is fixed on the rotating disc, a second camera housing that is rotatable relative to the rotating bracket is provided on the rotating bracket, and a second camera is provided within the second camera housing. Obviously, the second camera housing of the combined camera directly rotatably connected to the first camera housing through both the rotating disc and the rotating bracket, thereby eliminating the mounting bracket and the base in the existing combined camera of a gun-ball linkage structure, thus simplifying the overall structure and reducing its height dimension.

Abstract: The present application discloses a multi-lens camera, comprising a camera body and a light supplementing device; wherein, the camera body comprises a body shell assembly, lenses, an lens regulator and a transparent cover that is installed on the body shell assembly; the lens regulator is installed within a space formed by the body shell assembly and the transparent cover; the transparent cover comprises a flat portion and a curved portion surrounding the flat portion; the lenses are located within a space covered by the curved portion; the lens regulator comprises a fixing disc and at least two lens brackets; each of the lens brackets comprises a first bracket configured for mounting a lens; the first bracket is movably provided on the fixing disc, and is movable along the circumference of the fixing disc; the light supplementing device surrounds and is located outside of the camera body to provide fill light.