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Method for automatically generating large-scale digitization altitude data model based on image set

A technology for automatic generation of elevation data, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as manual processing

Active Publication Date: 2012-03-21
常熟紫金知识产权服务有限公司
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Problems solved by technology

The disadvantage of this technology is that due to the symmetrical flipping and stacking of the terrain sub-blocks in the blending operation, the adjacent terrain blocks have obvious symmetry features near the stitching, thus leaving artificial features in the generated terrain. Traces of processing

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  • Method for automatically generating large-scale digitization altitude data model based on image set
  • Method for automatically generating large-scale digitization altitude data model based on image set
  • Method for automatically generating large-scale digitization altitude data model based on image set

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0045] like figure 1 As shown, the large-scale digital virtual terrain automatic generation method based on the image set, its specific implementation steps are as follows:

[0046] According to the series of images input by the user ∑={I i，j} and terrain preparation control parameters (including the size of the standardized image, the level of point set simplification and the point set segmentation control parameter K, the density of the terrain grid, the control domain parameter radius or num, and the terrain relief control parameter η etc.), to construct large-scale digital virtual terrain.

[0047] 1. Standardize the series of images: the present embodiment adopts the bilinear interpolation method to scale the image I whose size is length*width pixels, and convert it into a square standard image whose size is size*size pixels: The pixel in the...

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Abstract

The invention discloses a method for automatically generating large-scale digitization altitude data model based on image set. The method is implemented by zooming images of each digit bit map as standardization images followed by half tone processing; simplifying a planar point set according to input parameters, setting a random height value and a round control zone for each point in the simplified point set, and defining a control function on each control zone; structuring a terrain mesh on each standardization image and determining control points of the mesh points; utilizing the weight values determined by the control function to mix the altitude values of the control points to be as the altitude value of virtual terrain block mesh points; and finally slicing adjacent terrain blocks DEM data to generate a large-scale DEM data set. The invention aims to realize automation synthesis of large-scale digitization DEM with different resolution ratios, the principle is simple and easy toimplement, various parameters are provided to control the terrain synthesis process, and natural smooth transition between adjacent terrain blocks is ensured.

Description

technical field [0001] The invention discloses a method for automatically generating a large-scale digital virtual terrain elevation data model DEM (Digital Elevation Model) by using a series of halftone images. Preparation. Background technique [0002] The digital terrain is usually expressed in a digital elevation model (DEM), and the prior art discloses a variety of digital terrain generation methods. [0003] A kind of generation technology of digital DEM obtained directly from the real world through measurement technology. This type of technology directly generates digital DEM of terrain from topographic measurement data, such as GIS (Geographic Information System) data collected by telemetry satellites. The disadvantage of this type of method is that it is relatively difficult to obtain a terrain model that meets specific needs, and the acquisition cost is high, and it is difficult to adapt to the needs of applications such as virtual driving training and video game...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/05
Inventor 庞明勇樊春玲
Owner 常熟紫金知识产权服务有限公司
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