Image processing system and method based on close-range photogrammetry

Abstract

The invention discloses an image processing system and method based on close-range photogrammetry, and the method comprises the steps: obtaining camera parameters, obtaining target image information,obtaining an orthographic projection equal-proportion image through the close-range photogrammetry, and carrying out the measurement and editing of the orthographic projection equal-proportion image;storing the orthographic projection equal-proportion image in an electronic form; performing projection transformation processing on the acquired image by using a two-dimensional direct linear transformation calibration method to obtain an orthographically projected equal-proportion image, and simultaneously realizing the coordinate processing of the image; and performing linear measurement on theobtained orthographic projection equal-proportion image through a distance measurement algorithm to obtain a required size, and / or performing watermark adding, cutting, contrast enhancement and otherprocessing on the obtained orthographic projection image. According to the invention, a close-range photogrammetry technology is used to carry out vertical orthographic conversion on an obliquely shot picture, the shape in an image is truly restored, and a measurement function is realized.

Description

technical field [0001] The present invention relates to the application field of photogrammetry technology, in particular to an image processing method based on close-range photogrammetry. The present invention also provides an image processing system based on close-range photogrammetry. Background technique [0002] With the development of electronic technology, scanning equipment and cameras have become a common way for people to record and save files. By recording information such as files that need to be saved in the form of digital files such as pictures, they can be stored, displayed, modified, and improved by computers to meet people's various needs. form needs. [0003] Although the scanning equipment can realize the equal-scale recording of documents, such as a scanner, it needs a fixed position to place the materials to be scanned. The required equipment is large in size, takes up a lot of office space, and is inconvenient to carry and power supply. question. [...

AI Technical Summary

Problems solved by technology

[0003] Although the scanning equipment can realize the equal-scale recording of documents, such as a scanner, it needs a fixed position to place the materials to be scanned. The required equipment is large in size, takes up a lot of office space, and is inconvenient to carry and power supply. question

[0004] Ordinary cameras or smart phones with camera functions can greatly improve the convenience of recording, but there are shooting problems such as shooting angles that are tilted, which leads to the imbalance of the file ratio in the photo; the document paper has natural curvature, and the photo effect is not ideal; and there are The environmental background other than a large number of files will affect the appearance and use effect of the files. If you need to print and display later, it will also affect the printing effect

[0005] Most of the image processing (such as edge detection, distortion correction, plane correction, edge cropping, etc.) algorithms on the current network are mature open source algorithms, but none of the existing open source algorithms for image processing can achieve equal-scale measurement processing of acquired images

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