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Shooting direction recognition method, server and monitoring method, system and camera equipment

A technology of shooting direction and server, applied in the field of information processing, can solve the problems of poor robustness of panorama, large feature dimension, and heavy workload, etc., to improve the efficiency of recognition processing, improve the degree of matching, and ensure the stability.

Active Publication Date: 2021-01-29
ALIBABA GRP HLDG LTD
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Problems solved by technology

[0004] However, in the above-mentioned prior art, the panorama image obtained by the panoramic camera or the way of collecting a circle of images around it is poor in robustness and has a large feature dimension, and the success rate of accurately matching the corresponding area in the target image matching process is low. Due to the variability of directions, as well as the influence of time and weather, the existing methods need to collect a large number of global map samples to match, which greatly increases the workload and reduces the processing efficiency.

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  • Shooting direction recognition method, server and monitoring method, system and camera equipment
  • Shooting direction recognition method, server and monitoring method, system and camera equipment
  • Shooting direction recognition method, server and monitoring method, system and camera equipment

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[0088] Furthermore, the homography transformation matrix obtained by calculating the point features of the two images can reflect the coordinate transformation relationship of the two images, that is, the homography transformation matrix can be regarded as the point mapping of an image on a two-dimensional plane to another plane Mapping relationship, for a fixed-point camera, if its internal parameters (the internal parameters of the camera include focal length and other parameters related to the internal structure of the camera) are known, the relative reference center of the target image can be directly derived through the homography transformation matrix An offset parameter of the image (ie, the matching reference image). In an implementation manner, the offset parameter may be a horizontal rotation offset Δp, a vertical elevation angle offset Δt, and a scaling offset Δz. Then, after the direction information of the matched reference image is known, that is, after obtaining...

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Abstract

The embodiment of the present application discloses a shooting direction recognition method, a server, a monitoring method, a system, and a camera device. The method includes: extracting the depth feature of the target image captured by the camera; determining a reference image matching the target image based on the matching degree between the depth feature of the target image and the depth features of multiple reference images; obtaining The coordinate position relationship between the matched reference image and the target image; calculating the shooting direction of the camera when shooting the target image by using the coordinate position relationship and the direction information of the matched reference image . By using the embodiment of the present application, the shooting direction of the camera can be quickly and accurately identified, and the processing efficiency of shooting direction recognition is greatly improved.

Description

technical field [0001] The present application relates to the technical field of information processing, and in particular to a shooting direction identification method, a server, a monitoring method, a system, and an imaging device. Background technique [0002] Video surveillance equipment is currently being widely used in public place supervision, traffic management, place safety management, outdoor and indoor video recording and other functions. Currently, video surveillance equipment mainly adopts camera equipment, for example, conventional closed-circuit cameras, dome cameras, mobile camera equipment, and the like. Due to the variability of the shooting direction of the camera during the shooting process, as well as the influence of time, weather, etc., there will also be large differences in the video images or picture images collected at the same location and at the same height. Therefore, when video or pictures captured by a camera are used for monitoring and proce...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232
CPCG06T7/74G06T7/337H04N23/64H04N23/951H04N23/698H04N23/6815G06T7/97G06F18/22
Inventor 高强华
Owner ALIBABA GRP HLDG LTD
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