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Image processing system and method based on close-range photogrammetry

A technology of close-range photography and image processing, applied in the application field of photogrammetry technology, which can solve problems such as inconvenient power supply, imbalanced file ratio, and unsatisfactory photographic effect

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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Image processing system and method based on close-range photogrammetry
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  • Image processing system and method based on close-range photogrammetry

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and a brief implementation mode and operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0042] like figure 1 In the illustrated embodiment, an image processing method based on close-range photogrammetry, the method includes: acquiring camera parameters, acquiring target image information, acquiring equal-scale orthographic projection images through close-range photogrammetry processing, and storing the processed images in electronic form.

[0043] As an embodiment, the acquisition method of the camera parameters is as follows: acquire a calibration sample image by taking a photo camera, use the Exif. Distortion correction coefficient, for subsequent call of photogrammetry un...

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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. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/521
CPCG06T7/521G06T2207/10008
Inventor 冯浩李威
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