UAV aerial image calibration method suitable for plane measurement

Abstract

The invention discloses a UAV aerial photography image calibration method suitable for plane measurement. First, an image calibration model is established; it is judged whether to calibrate any map or on-site aerial photography calibration, and if any map is calibrated, the image calibration is completed Finally, perform fine-tuning to complete the calibration; if it is on-site aerial photography calibration, first perform aerial photography image acquisition, and record the calibration parameters, and then automatically calibrate to obtain preliminary calibration parameters; and judge whether the preliminary calibration parameters meet the requirements, and if so, complete the calibration ; If not, perform planar image deskewing or planar image fast calibration, and after planar image deskewing or planar image quick calibration, perform fine-tuning to complete the calibration. The present invention adopts a simpler, clearer and faster image operation to realize real-time UAV calibration and measurement, which saves time and cost to a great extent; the fast calibration mode can be used to make up for the map blind spot problem of image calibration, greatly Improved calibration efficiency and user experience.

Description

technical field [0001] The invention relates to the field of image calibration, in particular to a method for calibrating aerial images of unmanned aerial vehicles suitable for plane measurement. Background technique [0002] Traditional surveying and mapping surveys mostly use professional surveying instruments such as GPS locators or total stations for field surveys. Although such surveying and mapping methods have high precision, they are difficult to operate and need to be on the spot to complete the survey work, which is inefficient. [0003] In recent years, with the development of unmanned aerial vehicle technology, more and more survey work has begun to integrate UAV aerial photography technology into it. With the mobility and intelligence of UAV, the measurement efficiency has been greatly improved. However, at present, the operation of UAV measurement technology still requires a professional team and equipment to carry out, which not only requires high technical re...

AI Technical Summary

Problems solved by technology

Although this method is applicable to any aerial pictures, it needs to provide the geographical coordinates of known points, and even use GPS locator to measure the known points on the spot to obtain the geographical coordinates, resulting in complicated implementation process, low efficiency, high technical requirements, and user poor experience

[0006] 2. Through professional image measurement software, several continuous associated images are geographically spliced ​​according to the aerial three-dimensional data of exposure points to achieve high-precision deviation correction. This method can splice several sub-aerial images into a whole picture, which is suitable for the production of large-area aerial maps. , but because image processing requires professional software and graphics workstations, the software and supporting graphics workstations are not only expensive, but most of the image stitching processing takes several hours to complete, and the calibration results cannot be obtained in real time and on the spot, making the efficiency low

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