Method for measuring heights and widths of vertical target object in any position by using single picture of photographing superstation
A technology of target objects and super-station instruments, which is applied to the interpretation of instruments, measuring devices, and photos, and can solve problems such as high labor costs, time-consuming and labor-intensive, and low measurement efficiency
Inactive Publication Date: 2015-05-06
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology
At present, the main measurement method of width is manual measurement with a scale, which belongs to contact measurement. Due to the influence of terrain and understory shrubs, it is time-consuming and laborious to measure the target objects in the sample plot. One person needs to measure and record, and the labor cost is high.
The height measurement is measured by an altimeter, and there are problems such as the difficulty of accurately judging the apex of the target, resulting in large measurement errors, and the cooperation of two people is required, and the measurement efficiency is low
[0003] Therefore, the use of traditional instruments in the measurement process inevitably brings a lot of trouble and errors
Method used
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Embodiment Construction
[0010] 1. Use the photographic super station for field work to obtain photos and data of vertical targets.
[0011] 2. Use the photogrammetry system for office processing to obtain the image point coordinates of any vertical target in the photo. Considering that there is an inclination around the X-axis during photography, the obtained photos are corrected using formulas and rotation matrices. Then, deduce and calculate the coordinates of the width direction and the height direction of any position of the target. Finally, the data obtained from the field is substituted into the derived formula to obtain the width and height of any part of the target.
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The invention relates to a method for measuring heights and widths of a vertical target object in any position by using a single picture of a photographing superstation. The method comprises the following steps: carrying out a field process by using the photographing superstation to acquire a picture of a vertical target and the following data: a dip angle omega and a horizontal distance deltaY from a lens to the vertical target object; then carrying out office analysis by using a photographing measuring system to acquire an image point coordinate in the picture of the vertical target object; as the dip angle omega exists around the axis X during photographing, correcting the single picture and changing the coordinate value in the direction when the axis X is not changed; deducing and calculating the formula and a known quantity to acquire coordinates in the width and height directions in any position of the target object; and finally, introducing the field operation deduced data into an office analysis deduced formula to obtain the width di and the height hi in any position of the target object.
Description
1. Technical field [0001] The method belongs to the method of measuring the height and width of any vertical target object by using a single photo of a new surveying and mapping instrument, a photographic super station, in photogrammetry. 2. Technical background [0002] The height and width of any target object are two important measurement factors in photogrammetry observation. At present, the main measurement method of width is manual measurement with a scale, which is a contact measurement. Due to the influence of terrain and understory shrubs, it is time-consuming and laborious to measure the target objects in the sample plot. It requires one person to measure and record, and the labor cost is high. The height measurement is measured by an altimeter, and there are problems such as the difficulty of accurately judging the apex of the target, resulting in large measurement errors, and the cooperation of two people is required, and the measurement efficiency is low. [00...
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Login to View More IPC IPC(8): G01C11/04
CPCG01B11/03G01B11/0608
Inventor 冯仲科邱梓轩
Owner BEIJING FORESTRY UNIVERSITY