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Sea ice surface roughness measuring method based on line laser

A line laser and measurement method technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of long use time and reduced measurement efficiency, and achieve the effect of reducing measurement time and improving measurement efficiency

Active Publication Date: 2013-03-06
CENT FOR EARTH OBSERVATION & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] The problem solved by the present invention is: when the sea ice surface is scanned by a point laser, the instrument needs to be constantly adjusted during the measurement process to scan multiple points on the sea ice surface to obtain the elevation information of multiple points on the sea ice surface, As a result, the entire measurement process takes a long time, which reduces the problem of measurement efficiency

Method used

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  • Sea ice surface roughness measuring method based on line laser
  • Sea ice surface roughness measuring method based on line laser
  • Sea ice surface roughness measuring method based on line laser

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Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] Such as figure 1 Shown, the sea ice surface roughness measurement method based on line laser of the present invention comprises the following steps:

[0028] S1: Set up a measurement system including a camera and a line laser according to the principle of laser triangulation, so that the line laser is vertically projected onto the surface of the sea ice to be measured, forming light marks on the surface of the sea ice to be measured, and the camera's The center of the lens is facing the light marks;

[0029] S2: Using the camera to take pictures to obtain an image of the light trace on the surface of the sea ice to be measured;

[0030] S3: Process the image, extract the laser bright line, and convert the position information of the pixel on the laser bright line into the elevation information of the corresponding point on the light t...

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Abstract

The invention discloses a sea ice surface roughness measuring method based on a line laser. The sea ice surface roughness measuring method comprises the following steps of: S1, erecting a measuring system including a camera and the line laser so as to enable the line laser to be vertically projected to the sea ice surface to be measured, and forming light mark on the sea ice surface to be measured, wherein the lens center of the camera aligns with the light mark; S2, using the camera to take a picture so as to obtain an image of the light mark on the sea ice surface to be measured; S3, processing the image, extracting a bright laser line in the image, and converting the position information of the pixel on the bright laser line into elevation information of a corresponding point on the light mark according to the resolution of the measuring system; and S4, calculating the roughness of the sea ice surface to be measured according to the elevation information. As the line laser is utilized to take the place of spot laser to scan the sea ice surface, the equipment does not need to be adjusted in the measurement process, and the elevation information of the sea ice surface can be obtained through once scanning, so that the measurement time is reduced, and the measurement efficiency is improved.

Description

technical field [0001] The invention relates to a method for measuring the surface roughness of sea ice, in particular to a method for measuring the surface roughness of sea ice based on a line laser. Background technique [0002] The surface roughness of sea ice is an important parameter restricting the scattering of sea ice surface, and it is also a manifestation of the degree of sea ice melting. In the study of sea ice classification, the analysis of the corresponding scattering characteristics of the sea ice surface will improve the adaptability of sea ice classification to different wind fields and seasons. Therefore, the measurement of sea ice surface roughness has important practical significance. [0003] The sea ice surface roughness measurement methods used in the prior art mainly include contact and non-contact methods. The contact type mainly includes the roller type and the probe type, and the non-contact type mainly includes the laser type and the photographi...

Claims

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Application Information

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IPC IPC(8): G01B11/30
Inventor 温晓阳董庆薛存金
Owner CENT FOR EARTH OBSERVATION & DIGITAL EARTH CHINESE ACADEMY OF SCI
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