A Fast and Comprehensive Reading Method of Radarsat-1 Image Data
A technology of image data and image data, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of inability to comprehensively read image metadata information, cumbersome process, and unfavorable use of self-developed projects. Ease of manipulation and re-implementation, simplicity of implementation, effect of simplifying the process of direct parsing
Active Publication Date: 2016-12-28
ZHEJIANG UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The first method has obvious disadvantages: first, it needs to install the corresponding environment, which is not conducive to the use of independent development projects; second, it is impossible to fully read the metadata information of the image
The second method directly analyzes a large amount of metadata of Radarsat-1 images, and the process is more cumbersome
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0042] The first step is to analyze the structural composition of the image data according to the characteristics of Radarsat-1 images, and obtain the unique identification codes of different data sets; the unique identification codes are composed of the following six elements: the file to which they belong, the first subtype code, the type code, The second subtype code, the third subtype code, and the index number of the dataset, and the feature values are fixed. The Radarsat-1 image of the embodiment includes five files, VDF_DAT.001, TRA_01.001, NUL_VDF.001, LEA_01.001, and DAT_01.001, which are Volume Directory, Trailer, Null Volume Directory, Leader, and Data files respectively. Among them, the LEA_01.001 file includes four data sets including File Descriptor, Map Projection, etc., the TRA_01.001 file includes five data sets including File Descriptor, Data Set Summary Record, etc., and the VDF_DAT.001 file includes Volume Descriptor, There are five data sets including SA...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for fast and comprehensively reading Radarsat-1 image data, and belongs to the field of SAR image data processing. The method comprises the following steps that (1) the structural composition of the image data is analyzed according to the characteristics of the Radarsat-1 image data to acquire a unique identification code of different data sets; (2) initial data of all the data sets in an image are acquired according to the unique identification code through an open-source GDAL; (3) corresponding data templates of the different data sets are generated according to instructions of the image data; (4) the initial dada acquired in the second step are analyzed according to the data templates to generate metadata; (5) all wave band information is read through the GDAL to generate image data; (6) regarding to data of plural types such as SingleLookComplex (SLC), each pixel datum is divided into two parts serving as an imaginary number and a real number respectively, each wave band can acquire an imaginary number wave band and a real number wave band, and image data are generated. According to the method for fast and comprehensively reading the Radarsat-1 image data, the data can be comprehensively read, and the method can be easily put into force, and has good application prospects in the field of SAR image data processing.
Description
technical field [0001] The invention relates to the technical field of SAR remote sensing image processing, in particular to a method for quickly and comprehensively reading Radarsat-1 image data. Background technique [0002] SAR, also known as synthetic aperture radar, uses the relative motion of the radar and the target to synthesize a smaller real antenna aperture into a larger equivalent antenna aperture radar. Compared with ordinary optical remote sensing technology, SAR has the characteristics of high resolution, can work around the clock, can effectively identify camouflage, penetrate cover, etc., and is widely used in aerial survey, satellite ocean observation, space observation, image matching guidance, etc. SAR images are mostly used in surveying and mapping, military reconnaissance, resource exploration and other fields that require high remote sensing images, and its processing technology determines the application effect of images. [0003] Radarsat-1 satellit...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 刘仁义杜震洪张丰胡倩陈明侯志通
Owner ZHEJIANG UNIV