Grassland coverage-degree extraction method based on mobile phone camera

A technology of mobile phone camera and extraction method, which is applied in the field of grassland coverage extraction based on mobile phone camera, can solve the problems of waste of manpower, material resources, low efficiency, and large artificial observation error of grassland grassland coverage, so as to save manpower and material resources. accurate results

Inactive Publication Date: 2015-11-18
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for extracting grassland coverage based on a mobile phone camera, which solves the problem that the artificial observation error of grassland grassland coverage is relatively large, which wastes a lot of manpower and material resources; and the grassland coverage extraction method for existing photos is complicated and has low efficiency The problem

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  • Grassland coverage-degree extraction method based on mobile phone camera
  • Grassland coverage-degree extraction method based on mobile phone camera
  • Grassland coverage-degree extraction method based on mobile phone camera

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Embodiment Construction

[0027] The present invention will be described in detail below in combination with specific embodiments.

[0028] The process of the present invention is as figure 1 shown, follow the steps below:

[0029] Step 1: Data Acquisition

[0030] The usage data comes from photos of prairie grass taken by mobile phone cameras.

[0031] When taking a photo requires:

[0032] ① The weather conditions are good (sunny is the best, rain, fog, sandstorms and other bad weather are forbidden), and the pictures taken are guaranteed to be clear.

[0033] ② When taking pictures, the mobile phone should be taken perpendicular to the ground to reduce the geometric deformation of the edge of the photo.

[0034] ③The shooting location requires a good GPS signal, which is convenient for obtaining accurate latitude and longitude information of the shooting location. Step 2: Photo Upload

[0035] Develop mobile phone software to upload the photos taken to the server, and upload the location (long...

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Abstract

The invention discloses a grassland coverage-degree extraction method based on a mobile phone camera. Data from a prairie grassland picture photographed by the mobile phone camera is used; the photographed picture is uploaded to a server, and a photographing place, photographing longitude, photographing latitude, photographing time and a photographing person are uploaded to a server side database at the same time; a vegetation coverage degree in the picture is extracted through adoption of a DNI method; and comparative analyses of a calculation result obtained through the DNI method and a classification result obtained through a supervision classification method are performed. The grassland coverage-degree extraction method is advantageous in that a result obtained through a mobile phone photographing extracting method is accurate, the grassland coverage-degree extraction method can rely on a mode that herdsmen take pictures using herdsmen's mobile phones and upload the pictures, and a lot of manpower and material resources can be saved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a method for extracting grassland coverage based on a mobile phone camera. Background technique [0002] Vegetation coverage is an index that reflects the basic situation of vegetation, and is an important parameter concerned by agronomy and ecology. Obtaining digital photos of the ground surface and further extracting vegetation coverage has become one of the most potential means of ground measurement of vegetation coverage. Chi Hongkang et al [1] The vegetation and non-vegetation pixels of the digital photos were manually extracted using Photoshop image processing software to calculate the vegetation coverage. Zhou and Robson [2] Using digital photos, the grassland coverage is extracted through the unsupervised classification method combining spectrum and texture. The results prove that this method is more accurate than the simple use of k-means unsupervised classific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06T7/40
CPCG06T2207/10024G06V20/188
Inventor 邱新法朱晓晨高佳琦丁肖
Owner NANJING UNIV OF INFORMATION SCI & TECH
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