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117 results about "Omnidirectional camera" patented technology

In photography, an omnidirectional camera (from "omni", meaning all), also known as 360-degree camera, is a camera having a field of view that covers approximately the entire sphere or at least a full circle in the horizontal plane. Omnidirectional cameras are important in areas where large visual field coverage is needed, such as in panoramic photography and robotics.

Omnidirectional stereo vision three-dimensional rebuilding method based on Taylor series model

The invention discloses an omni-directional stereo vision three-dimensional reconstruction method based on Taylor series models. The method comprises the following: a step of calibrating a camera, which is to utilize a Taylor series model to calibrate an omni-directional vision sensor so as to obtain internal parameters of the camera; a step of obtaining epipolar geometric relation, which comprises the steps of calculating an essential matrix between binocular omni-directional cameras and extracting the rotation and translation component of the cameras; a step of correcting an outer polar line, which is to correct the outer polar line of a shot omni-directional stereo image so as to allow a corrected polar quadratic curve to coincide with an image scan line; and a step of three-dimensional reconstruction, which is to carry out feature point matching to the corrected stereo image and calculate the three-dimensional coordinates of points according to matching results. The method can be applicable to various omni-directional vision sensors, has the characteristics of wide application range and high precision, and can carry out effective three-dimensional reconstruction under the condition that the parameters of the omni-directional vision sensors are unknown.
Owner:ZHEJIANG UNIV

Special intelligent unmanned aerial vehicle for agriculture and forestry

The invention discloses a special intelligent unmanned aerial vehicle for agriculture and forestry. The special intelligent unmanned aerial vehicle is characterized by comprising an unmanned aerial vehicle airframe, wings, an unmanned aerial vehicle nose, a pesticide sprayer and fixed supports; a multi-rotor wing propeller is connected with the middle of the airframe through a lifting device; the multi-rotor wing propeller comprises a support tray, telescopic shafts and small-sized rotor wings; the six small-sized rotor wings are distributed on the periphery of the support tray; four propellers are distributed around; a motor is located at the lower side of each propeller; the lower side of each motor is provided with a sensor; an omnidirectional camera is located at the lower side of the unmanned aerial vehicle nose. The special intelligent unmanned aerial vehicle for the agriculture and forestry is not influenced by regions, and can arrive areas that working personnel cannot reach; through intelligent control, the special intelligent unmanned aerial vehicle is driven by means of the multiple rotor wings; the special intelligent unmanned aerial vehicle is used for detecting insect pests and spraying pesticides in the aspect of the agriculture and forestry; by processing photos transmitted back, people obtain favorable data; the special intelligent unmanned aerial vehicle has a very good effect.
Owner:山东佰盛能源科技有限公司

Single-chart self-calibration method of catadioptric omnibearing camera mirror plane pose

InactiveCN102184545ACalibration validImage analysisCamera lensEllipse
The invention discloses a single-chart self-calibration method of a catadioptric omnibearing camera mirror plane pose, comprising the following steps: firstly, calculating to obtain two candidate poses by using an ellipse fit by image points on the outer edge of the mirror plane in a collected image; respectively generating two groups of predicted formed images of the edge of a perspective camera by the two candidate poses; and comparing the two groups of predicted formed images with a practical lens formed image, wherein a candidate pose corresponding to the predicated formed image with small difference is a practical mirror plane pose, and necessary distance between a camera projection center and a practical lens edge in the calibration process is obtained by using an optimized search method. By using the method, the deficiency of the existing calibration method is overcome; under the condition that the mirror plane parameter and the perspective camera parameter are known, a rotary matrix and a translation vector between a reflection mirror surface and the perspective camera can be estimated only by one self-shooting image of the catadioptric omnibearing camera without other calibration objects. The calibration method has the characteristics of strong anti-interference performance and higher precision and is simple to operate.
Owner:ZHEJIANG UNIV
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