Making method for grotto digital line graph based on digital close-range photogrammetry

A digital line drawing and photogrammetry technology, applied in photogrammetry/video surveying, measuring device, surveying and navigation, etc., can solve the problems of unfavorable document archiving and management, time-consuming, low efficiency, etc. The effect of management and easy restoration of cultural relics

Inactive Publication Date: 2012-10-17
武汉华宇世纪科技发展有限公司
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Problems solved by technology

The traditional method uses grids to draw by hand or pictures taken by ordinary cameras are distorted, ti...

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  • Making method for grotto digital line graph based on digital close-range photogrammetry
  • Making method for grotto digital line graph based on digital close-range photogrammetry
  • Making method for grotto digital line graph based on digital close-range photogrammetry

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Embodiment Construction

[0025] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0026] The method for making digital line drawing of grottoes based on digital close-range photogrammetry of the present invention, the method steps are:

[0027] 1. Field data collection:

[0028] Investigate the shooting site, work out the shooting distance and shooting location. Select the appropriate camera and lens, and design the control point distribution map.

[0029] According to the site conditions of the grottoes, use the shooting device (see Figure 4 ) fixed the camera at different heights to take parallel photography of the grotto. Shooting requires clear photos. The subject must occupy more than two-thirds of the frame. The overlap between the upper and lower images is 80%, and the overlap between the left and right flight strips is 80%. (see attached figure 2 )

[0030] In the field control point measurement, th...

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Abstract

The present invention provides a making method for a grotto digital line graph based on digital close-range photogrammetry. The method comprises the following steps: 1, acquiring field data: comprising image acquisition and field work control point coordinate measuring; 2, organizing the images: importing image data and camera parameters, inputting the strip parameter, and carrying out strip grouping on the images; 3, establishing a grotto digital model: carrying out aerial triangulation matching, free network bundle adjustment and encryption matching to generate an accurate grotto digital model; 4, generating an orthophoto image: carrying out accurate correcting, inlaying and merging with a software according to the digital model generated in the step 3 to generate an orthophoto image of the subject to be detected; and 5, drawing a digital line graph: drawing a digital line graph having the accurate geometric position relationship based on the orthophoto image according to the requirements of cultural relics department. The method of the present invention has characteristics of low working environment requirements, no damage on the grotto, high precision, and rapid speed.

Description

technical field [0001] The invention relates to the field of digitization of cultural relics and the field of close-range photogrammetry. Specifically, it is a method for making digital line drawings of grottoes based on digital close-range photogrammetry. technical background [0002] Grotto line drawings play an important role in archaeological reports, and the geometric dimensions are required to be completely correct. The traditional method uses grids to draw by hand or pictures taken by ordinary cameras are distorted, time-consuming, distorted, and extremely inefficient, which is not conducive to document archiving and management. Contents of the invention [0003] The purpose of the present invention is in order to obtain the digital vector flat elevation profile that is completely faithful to the original appearance of the grottoes and has precise geometric positional relationships. The three-dimensional coordinates of any point on the line in such a pict...

Claims

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Application Information

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IPC IPC(8): G01C11/00
Inventor 黄莉萍
Owner 武汉华宇世纪科技发展有限公司
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