Method for establishing a photogrammetric grassland coverage measurement map library and a use method

A photographic method and grassland technology, which is applied in the interpretation of photos, still image data retrieval, still image data indexing, etc., can solve problems such as difficulty in mastering technology, inability to compare technology, unfavorable learning from each other, and technological progress, etc., to achieve good market promotion The effect of applying the foreground

Active Publication Date: 2019-05-24
TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the lack of third-party and recognized grassland images to evaluate the technologies recorded in the literature or in practice, it is difficult to grasp the advantages and disadvantages of the technologies, let alone compare the technologies, which is not conducive to learning from each other and making technological progress

Method used

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  • Method for establishing a photogrammetric grassland coverage measurement map library and a use method
  • Method for establishing a photogrammetric grassland coverage measurement map library and a use method
  • Method for establishing a photogrammetric grassland coverage measurement map library and a use method

Examples

Experimental program
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Embodiment 1

[0031] Taking multiple groups of photographs of a certain lawn and grassland in the measurement library as an example, the method for establishing the measurement library of grassland coverage by photography will be described in detail below.

[0032] Step 1. Take a photo of the same location of the lawn in Xiangningli, Nankai District, Tianjin. On the same day, three different shooting methods were used to take a total of three photos. The length and width of each photo are 1362mm and 880mm, and the resolution is the same. It is 4000×3000; record the shooting information of three photos:

[0033] 1) Grassland type: lawn grassland;

[0034] 2) Shooting location: Xiangningli, Nankai District, Tianjin;

[0035] 3) Shooting date: April 20, 2013;

[0036] 4) Shooting measures: Since the weather was sunny on the day of shooting, three shooting measures were used for the three photos, namely normal shooting, shooting after shading and shooting with flashlight. Finally, it is bene...

Embodiment 2

[0052] Such as figure 1 Shown is the specific method of using the photographic grassland coverage measurement library established by the above method to evaluate a certain photographic grassland coverage measurement technology UIP-MGMEP, and the steps are as follows:

[0053]Step 1, call the three photos of lawns and grass land obtained by embodiment 1 in the metering library, as shown in Figure 4 (a), Figure 5 (a) and Figure 6 (a), use the photographic lawn coverage measurement to be measured The technology processes each photo of the grassland in turn, and the length and width of the three grassland photos shown in Figure 4(b), Figure 5(b) and Figure 6(b) are consistent, and 0 represents non- Vegetation, 1 represents the binary image assigned in the way of vegetation, count the pixel ratio of the pixel value of 1 in the binary image, and get the grassland test coverage;

[0054] After the above process, the test coverage obtained by UIP-MGMEP for the three photos of lawns a...

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Abstract

The invention discloses a method for establishing a photogrammetric grassland coverage measurement map library and a use method. The map library establishing method comprises the following steps of: searching various typical types of grassland photos and representing the grassland type of each photo; sequentially listing photographing positions, shooting dates, photographing weather conditions, light supplement and the like into a grassland photo statistical table; generating a column number N1 according to the resolution N1 * N2 of each typical grassland photo; overlapping the table and the grassland photo together by a table with the line number of N2, artificially identifying the image types of the positions, corresponding to n random points generated in the table, on the grassland photo, and counting the proportion of the random points representing the grassland in all the random points, namely the real coverage of the grassland in the image; When in use, acquiring an evaluation result by comparing with a result obtained by a to-be-tested technology; The establishment method and the use method of the metering gallery are simple and easy to implement, and a platform beneficial to competition between technologies under the completely same condition is provided.

Description

technical field [0001] The invention relates to the technical field of photographic grassland coverage measurement, in particular to a method for establishing a photographic grassland coverage measurement library and a method for using it. Background technique [0002] The photographic lawn coverage measurement technology is an application technology in the grassland coverage measurement after the popularization of digital cameras. You only need to take pictures on site, and use a computer to automatically identify the grass in the digital photos indoors and automatically calculate the coverage of the grass. It is simple and economical. , Less time-consuming on-site operations and other advantages. However, due to the lack of third-party and recognized grassland images to evaluate the technologies recorded in the literature or in practice, it is difficult to grasp the advantages and disadvantages of the technologies, let alone compare the technologies, which is not conducive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/51G01C11/12
Inventor 胡健波彭士涛黄伟熊红霞
Owner TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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