Abstract: A method of processing an interference detected by a first microwave sensor is disclosed. The method comprising the steps of: receiving, by a second microwave sensor, from the first microwave sensor a message comprising a signal feature profile representing the interference detected by the first microwave sensor; matching, by the second microwave sensor, the signal feature profile comprised in the received message with a stored feature profile, the stored feature profile obtained by the second microwave sensor from its own received signal, and determining, by the second microwave sensor, that the interference detected by the first microwave sensor is caused by the second microwave sensor, if the signal feature profile matches the stored feature profile.

Abstract: A method for determining a column-hemispherical permeation radius with time-varying property of power-law cement grout and tortuosity of rock and soil mass is provided, including: acquiring a porosity ? of rock and soil mass and a corresponding permeation coefficient K by geotechnical tests, measuring a groundwater pressure P0 at a grouting point and determining tortuosity ? of rock and soil mass; acquiring an initial consistency coefficient c0, a rheological index n and a time-varying property coefficient k of power-law cement grout with a designed water to cement ratio by rheological tests, and determining the viscosity of water ?w; acquiring grouting parameters, including a grouting pressure P1, grouting time t, a number m of grouting holes of a side surface of a grouting pipe and a grouting hole radius r; and solving a column-hemispherical permeation grouting diffusion radius R considering coupling effect both the tortuosity of rock and soil mass and the time-varying property of power-law cement grout.

Abstract: A method of image-to-document conversion based on optical character recognition (OCR) includes obtaining an image to be converted into a target document, and performing layout segmentation on the image according to image content of the image, to obtain n image layouts, each of the n image layouts corresponding to a content type, and n being a positive integer. The method also includes, for each of the n image layouts, processing image content in the respective image layout according to the content type corresponding to the respective image layout, to obtain converted content corresponding to the respective image layout. The method further includes adding the converted content corresponding to the n image layouts to an electronic document, to obtain the target document.

Abstract: Embodiments of the present invention relate to the field of video monitoring and provide a method, an apparatus, and a system for acquiring a visual angle, so as to acquire an accurate visual angle value. The method for acquiring a visual angle includes: receiving, by a central processing unit CPU of a camera, angle information that is sent by an accelerometer sensor arranged on the camera; converting, by the CPU, the received angle information to a visual angle value; sending, by the CPU, the visual angle value to a server, so that a client receives the visual angle value forwarded by the server. The embodiments of the present invention are applicable to a video monitoring scenario.

Abstract: A video surveillance method, device, and system, which relate to the field of video surveillance and can reduce complexity of a locating operation and improve locating efficiency. The video surveillance method includes receiving, by a user equipment, a panorama sent by a camera; obtaining, by the user equipment, a view that is specified by a user and in the panorama; obtaining, by the user equipment according to a preset correspondence between a view and an angle, a surveillance angle corresponding to the view specified by the user; and sending, by the user equipment, the surveillance angle to the camera, so that the camera adjusts an angle of the camera to the surveillance angle. The present invention is applicable to viewing video surveillance view information.

Abstract: A pan-tilt-zoom device identification method, a pan-tilt-zoom device, a camera, and a pan-tilt-zoom device control system are provided. The corresponding method includes, when a pan-tilt-zoom device finds that a device connects to a predetermined interface, sending a keep-alive command to the connecting device, where the keep-alive command includes pan-tilt-zoom device capability information carrying a control function of the pan-tilt-zoom device; and determining, by the connecting device, the control function of the pan-tilt-zoom device according to the keep-alive command, and reporting control capability information of the pan-tilt-zoom device.

Abstract: A video surveillance method, device, and system, which relate to the field of video surveillance and can reduce complexity of a locating operation and improve locating efficiency. The video surveillance method includes receiving, by a user equipment, a panorama sent by a camera; obtaining, by the user equipment, a view that is specified by a user and in the panorama; obtaining, by the user equipment according to a preset correspondence between a view and an angle, a surveillance angle corresponding to the view specified by the user; and sending, by the user equipment, the surveillance angle to the camera, so that the camera adjusts an angle of the camera to the surveillance angle. The present invention is applicable to viewing video surveillance view information.

Abstract: A pan-tilt-zoom device identification method, a pan-tilt-zoom device, a camera, and a pan-tilt-zoom device control system are provided. The corresponding method includes, when a pan-tilt-zoom device finds that a device connects to a predetermined interface, sending a keep-alive command to the connecting device, where the keep-alive command includes pan-tilt-zoom device capability information carrying a control function of the pan-tilt-zoom device; and determining, by the connecting device, the control function of the pan-tilt-zoom device according to the keep-alive command, and reporting control capability information of the pan-tilt-zoom device.

Abstract: Embodiments of the present invention relate to the field of video monitoring and provide a method, an apparatus, and a system for acquiring a visual angle, so as to acquire an accurate visual angle value. The method for acquiring a visual angle includes: receiving, by a central processing unit CPU of a camera, angle information that is sent by an accelerometer sensor arranged on the camera; converting, by the CPU, the received angle information to a visual angle value; sending, by the CPU, the visual angle value to a server, so that a client receives the visual angle value forwarded by the server. The embodiments of the present invention are applicable to a video monitoring scenario.