Double-image forest photogrammetry by using CCD combined with total station

Abstract

The invention discloses a double-image forest photogrammetry by using CCD combined with total station. The double-image forest photogrammetry overcomes the deficiency and limitation of the present forest measurement, makes full use of the advantages of a CCD lens and total station, and applies photogrammetric technology to forest measurement. The double-image forest photogrammetry includes selecting an appropriate observation point by setting a relative coordinate system, performing double-image photography for the tree to be measured by using CCD and total station, acquiring stereopair, determining a collinearity equation of transition from image space to object space by using element values of exterior orientation determined by the total station and combined with coordinate information of more than one corresponding image point; furthermore determining the position of the tree and the coordinate figure on any place of the tree. The actual coordinate figure on any place of the tree can be calculated by using the combined photogrammetry, thereby the diameter at breast height and the height of tree to be measured can be determined directly. The double-image forest photogrammetry by using CCD combined with total station used for forest measurement, can greatly improve the efficiency and precision of the forest measurement, reduce labor intensity, and modernize the forestry investigation.

Description

1. Technical field [0001] The invention relates to a new technology of photogrammetry and tree measurement, in particular to a technology of using a CCD combined total station to perform double-chip photography to complete tree measurement. 2. Technical background [0002] At this stage, the tree measurement technology used mainly includes the combination of manual field measurement and visual measurement. Even if the photogrammetry technology is applied, it is only limited to single-chip photography. In modern forestry measurement, especially the measurement of forests, these methods The existing shortcomings and limitations are becoming more and more obvious, which has brought great trouble and inconvenience to modern forestry observation: [0003] ①Using the traditional manual survey method, the demand for manual labor is large, and the measurement cost is high; [0004] ②Using the combination of traditional manual field measurement and visual inspection, the measurement...

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Problems solved by technology

[0002] At this stage, the tree measurement technology used mainly includes the combination of manual field measurement and visual measurement. Even if the photogrammetry technology is applied, it is only limited to single-chip photography. In modern forestry measurement, especially the measurement of forests, these methods The existing shortcomings and limitations are becoming more and more obvious, which has brought great trouble and inconvenience to modern forestry observation:

[0003] ①Using the traditional manual survey method, the demand for manual labor is large, and the measurement cost is high;

[0004] ②Using the combination of traditional manual field measurement and visual inspection, the measurement accuracy is low, and it is difficult to meet some tasks with high precision requirements;

[0005] ③ When using the single-chip photogrammetry method to measure standing trees, it is also necessary to consider placing fixed-length flower poles at any time, and pay attention to the integrity of the flower poles when taking pictures, and the operation is more complicated;

[0006] ④Using the single-chip photogrammetry method, it can only realize the measurement of a single tree, and it is powerless to measure the whole forest

[0007] Therefore, there are more or less deficiencies and limitations in the tree measuring methods currently used, which have brought a lot of trouble and inconvenience to modern forestry investigations. How to find a new tree measuring method is particularly important

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