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Method for generating laser color cloud picture

A color and cloud image technology, applied in image data processing, measuring devices, 3D modeling, etc., can solve the problems of slow modeling speed, low precision, large amount of data, etc., and achieve convenient establishment, improved computing speed, and modeling speed saving effect

Active Publication Date: 2012-02-08
CAPITAL NORMAL UNIVERSITY
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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for fast and accurate three-dimensional reconstruction, which solves the problems of low precision, slow modeling speed and large amount of data in the process of three-dimensional reconstruction in the prior art

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  • Method for generating laser color cloud picture
  • Method for generating laser color cloud picture
  • Method for generating laser color cloud picture

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Embodiment Construction

[0029] see figure 1 , which generally summarizes the main steps of the laser color cloud image generation method of the present invention.

[0030] First, in step 10, the line-scan camera and the laser scanner are rigidly bound in parallel, the purpose of which is to make the corresponding relationship between the imaging pixel of the line-scan camera and the point cloud of the laser scanner relatively fixed and analytically calculateable, For example, it would be ideal to make the mapping relationship between the two linear or nonlinear time-invariant, so that the later data processing is simple but extremely accurate results can be obtained.

[0031] The so-called "parallel binding" refers to the scanning surface of the laser scanner and the "object" line (also known as the camera scanning line) of the line array camera and the plane determined by the front node (for ease of description in the present invention, this plane called "camera scan planes") are parallel to each o...

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Abstract

The invention provides a method for generating a laser color cloud picture, which is to set a plurality of target points in a scene to be detected. The method comprises the following steps: S10, rigidly binding a line camera and a laser scanner in parallel to ensure that two scanning surfaces of the line camera and the laser scanner are parallel, and the scanning surfaces are vertical to a line between the front node of the camera and the center of the laser scanner; S20, leading the line camera and the laser scanner to scan synchronously; S30, establishing a corresponding relationship between a scanning angle of the corresponding target point and pixel sequence number on a line image, i.e. a color searching list; and S40, establishing a relationship between each laser point in laser dot cloud and RGB information thereof according to the color searching list and the scanning time difference between the laser scanner and the line camera. The method ensures that fusion of the dot cloud and the image is changed from three-dimensional fusion in the prior art to polar coordinate one-dimensional fusion so as to reduce operation capacity, greatly improve the modeling accuracy, and achieve multiple functions. The method can greatly reduce time cost and economic cost of urban three-dimensional modeling.

Description

technical field [0001] The invention relates to a method for generating laser color cloud images, more precisely, laser color cloud images are generated by laser scanning and line array cameras for color three-dimensional image reconstruction and the like. The invention can be applied to the fields of aerospace / aviation remote sensing and photogrammetry, airborne / vehicle mobile measurement / spatial information service and the like. Background technique [0002] The current 3D object reconstruction technology mainly involves two aspects: contour determination and texture filling of 3D objects. There are two main technical approaches: one is to use complex large-scale calculations to carry out three-dimensional modeling through image data; Color information; finally, through data fusion, the color information is matched with the contour data to form a texture map. [0003] The method used in 3D city modeling is mostly the first way. Based on close-range photos, use 3D modeli...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00G01C11/00
Inventor 钟若飞宫辉力王留召刘先林
Owner CAPITAL NORMAL UNIVERSITY
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