A method and system for optimizing image control points of unmanned aerial vehicle oblique photogrammetry
An oblique photogrammetry and optimization method technology, applied in photogrammetry/video metrology, measuring devices, image analysis, etc., can solve problems such as heavy workload, no obvious pertinence, and small maneuverability of evenly distributed points. The effect of improving work efficiency
Active Publication Date: 2022-06-03
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology
[0006] The present invention is aimed at solving problems such as complex actual conditions in the measurement area, low maneuverability of evenly distributed points, large workload, no obvious pertinence, and large experience dependence when laying out UAV oblique photogrammetry control points. An image control point optimization method based on digital image spatial domain extraction is proposed, and a point layout scheme that reduces the field workload as much as possible and meets the requirements of special survey areas that cannot be evenly distributed in the case of ensuring the accuracy of photogrammetry is obtained, improving work efficiency
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[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described implementation
[0038] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiment of the present invention
[0039] In addition, in the present invention, such as the description related to "first", "second", etc. are only used for description purposes, and should not be construed as
[0041] The present invention will now be further described in conjunction with the accompanying drawings.
[0043] From the point of view of digital image processing, the places in the image that are clearly distinguished from the surroundings are usually in the empty space.
[0055] The specific idea is to input the original image into Matlab, and use the rgb2gray function to convert the RGB image into a grayscale image.
[0057] Due to the image operation performed in Matlab, its data type will ...
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The present invention aims to solve the problems of complex actual conditions in the survey area, low operability of evenly distributed points, large workload, no obvious pertinence, and large experience dependence when laying out the control points of the tilted photogrammetry of the current UAV. An image control point optimization method based on digital image spatial domain extraction is proposed, and image processing methods such as edge detection, image stretching processing, binarization processing, opening and closing operations, segmentation, marking, reorganization, and value selection are used to accurately find Points can be obtained to reduce the field workload as much as possible while ensuring the accuracy of photogrammetry, and to obtain a point layout plan that can meet the requirements of special survey areas that cannot be evenly distributed, and improve work efficiency.
Description
A method and system for optimizing image control points of UAV tilt photogrammetry technical field The invention belongs to (image control point) laying operation field in aerial photogrammetry work, relate in particular to a kind of unmanned A method and system for optimizing image control points of camera tilt photogrammetry. Background technique [0002] For UAV tilt photogrammetry, the most important part of controlling its accuracy is the layout and measurement of image control points. After solving the problem of accuracy, UAV tilt photogrammetry can be applied to market operations on a large scale. Commonly Used Controls Today The point layout method is not all field layout, including the air belt net method and the area network method. That is to set up a small number of control points on the ground, Use the empty three solution for encryption, and after the adjustment of the control point puncture point, the coordinates of all the points in the area are solv...
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IPC IPC(8): G06T7/11G06T7/13G06T7/136G06T5/30G01C11/00
CPCG06T7/11G06T7/13G06T7/136G06T5/30G01C11/00G06T2207/30184G06T2207/30188
Inventor 吴小娟梁好崔振营王永前徐维新卞玉霞崔林林宁侨侨段旭辉
Owner CHENGDU UNIV OF INFORMATION TECH