Full-automatic numerical control camera calibration system
A fully automatic, camera technology, applied in optics, instruments, photography, etc., can solve the problems of expensive, cumbersome multi-view photography acquisition and processing, and long cycle.
Active Publication Date: 2015-07-08
博视智能科技(重庆)有限公司
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Problems solved by technology
Professional optical equipment such as collimation tubes are not only expensive but also need to build a special laboratory environment, the application cost is high, and it is difficult to be practical; the camera calibration is performed with a high-precision three-dimensional control field as a reference, and there is difficulty in establishing a three-dimensional control field and regular Due to the problem of professional maintenance, and because the three-dimensional control field cannot be moved, the practical application is greatly restricted; the camera self-calibration technology proposed by the computer vision community uses simple two-dimensional targets such as plane grids, crosshairs, and circular signs as reference objects , only relying on multi-view correspondence for calibration is flexible, convenient, and has a wide application prospect, but its robustness is poor. Technical threshold
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[0019] Figure 1-4 For an implementation example, its specific implementation method is:
[0020] exist figure 1 In the shown embodiment, the system consists of three parts: camera rotating platform, LCD rotating platform, and system control circuit; the Y-axis rotating motor of the camera rotating platform drives the camera rotating platform to rotate along the Y-axis; the X-axis rotating motor of the camera rotating platform drives the camera The rotating platform rotates along the X axis; the Y axis rotating motor of the LCD rotating platform drives the LCD display rotating platform to rotate along the Y axis; the X axis rotating motor of the display rotating platform drives the display rotating platform to rotate along the X axis; the display rotating platform rotates along the Z axis , achieved by manual rotation.
[0021] exist figure 2 In the shown embodiment, the feet are composed of fine-grained rotating nuts with a pitch of 1 mm. There are four feet under the bot...
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The invention discloses a full-automatic numerical control camera calibration system, which is composed of an LCD (Liquid Crystal Display) rotating platform, a camera rotating platform and a system control circuit. The system control circuit controls the camera rotating platform and the LCD rotating platform to automatically rotate along an X axis and a Y axis; the system control circuit generates a black-white checkerboard as a calibration pattern by an embedded system ARM, displays the calibration pattern in the central region of an LCD, and realizes synchronization of an LCD platform angle rotation order and an LCD calibration pattern numerical index as well as warning on camera shooting time delay by serial port communication between a PLC (Programmable Logic Controller) and the ARM; the system control circuit automatically starts the camera to take pictures, platform rotating motion angle data is downloaded to a computer with calibration software by the system control circuit, and the computer automatically resolves camera calibration parameters according to the platform rotating motion angle data and camera calibration image data. The full-automatic numerical control camera calibration system is scientific in conception and simple in structure, overcomes the defects of dependence on special environments, high threshold of professional skills in implementation and long period of the conventional camera calibration device, and can meet various camera calibration needs based on image measurement.
Description
technical field [0001] The invention relates to a fully automatic numerical control camera calibration system for non-measurement camera calibration, which belongs to the comprehensive cross-technical field of mechatronics, automatic control and computer vision technology, and is mainly used in close-range photogrammetry, mechanical mold design and Applications related to visual measurement such as processing, industrial online detection and control. Background technique [0002] Camera calibration refers to the process of checking and calibrating the orientation elements and optical distortion parameters in the camera. It is the basic step and the primary problem in obtaining three-dimensional Euclidean space information from two-dimensional digital images. Traditional camera calibration either uses professional equipment for direct physical measurement, or performs indirect calculation of camera parameters based on the spatial relationship between the camera to be calibrat...
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IPC IPC(8): G03B43/00
Inventor 吴军
Owner 博视智能科技(重庆)有限公司