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482results about How to "Accurate identification" patented technology

Method and device for identifying lithologic character of altered volcanic rock

The invention relates to the field of geological exploration, particularly to a method and a device for identifying the lithologic character of altered volcanic rock. The method comprises the following steps: the relation between the lithologic character of volcanic rock and the corresponding drilling-logging data is established; lithologic character parameters are extracted from the drilling-logging data relating to the lithologic character of the volcanic rock; the extracted lithologic character parameters undergo information fusion, so as to obtain the feature model for drilling and logging the lithologic character of the volcanic rock; the measuring parameters of the volcanic rock to be measured before the drilling-logging are obtained; the measuring parameters of the volcanic rock to be measured are combined to a group identical with the character parameters in the information fusion, so as to be matched with the feature model; and if the matching is successful, the lithologic character of the volcanic rock corresponding to the volcanic rock to be measured is output. The embodiment of the invention can be used for visually, correctly, quickly and effectively identifying the lithologic character of the volcanic rock, and especially the knowledge on the altered volcanic rock is remarkably improved.
Owner:PETROCHINA CO LTD

Image processing method for centimeter-level precise landing of UAV (unmanned aerial vehicle)

The invention provides an image processing method for the centimeter-level precise landing of a UAV (unmanned aerial vehicle), and the method comprises the steps: making a target recognition pattern,enabling the UAV to fly to a place nearby a landing position, capturing an image, enabling a rotary PTZ camera to scan the ground surroundings if there is no target image recognized in a camera view at a current position, searching the target image, and adjusting the UAV to move above the landing point to start the form landing; recognizing the most apparent big rectangle at first in a landing process from a high place; recognizing three small rectangles again after the UAV descends to a certain height, enabling the UAV to land on the ground for recognizing a QR code at the center of the pattern best, determining the center position of the QR code after the target QR code is obtained, obtaining the horizontal distance at the centimeter-level precision, and achieving the centimeter-level precise landing. The method provided by the invention is accurate and reliable in recognition, is high in adaptability, has the centimeter-level precision, and solves the problems that a method for recognizing a QR image from a high place is limited in recognition height, is difficult to adapt to different brightness values and is weak in anti-interference capability.
Owner:南京奇蛙智能科技有限公司
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