Method for correcting abnormal data of 1B level remote sensing image of moderate resolution imaging spectrometer (MODIS)
An imaging spectrometer, image data technology, applied in instrumentation, reflection/re-radiation of radio waves, climate sustainability, etc., can solve problems such as discrepancies, difficult anomalous points or bands, high-precision correction, and reduction of spatiotemporal autocorrelation , to achieve the effect of accurate correction
Inactive Publication Date: 2012-11-28
EAST CHINA NORMAL UNIV
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However, for MODIS remote sensing images, a single pixel covers a large surface area, which is easily affected by cloud and other variable atmospheric elements, which reduces its spatiotemporal autocorrelation.
Moreover, the values obtained by the above methods are all calculated values after interpolation operations, which will be different from the real values, and it is difficult to correct a large number of abnormal points or bands in a concentrated distribution with high precision.
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[0094] refer to figure 1 , image 3 , Figure 4 and Figure 5 , to correct the abnormal data of the MODIS image whose imaging time was around 6:00 on June 4, 2008. The selected MODIS data is the MODIS data from the AQUA satellite received by the Guangzhou, Beijing and Urumqi ground receiving stations in the DVB-S system , choose an image with a spatial resolution of 1KM. According to the flow chart of the present invention, the abnormal data in the three images are corrected, and the image data and corresponding latitude and longitude data of these sites are read through step 1, and then the correction method given in step 2 and step 3 can correct the abnormal data edge The latitude data is corrected according to the linear interpolation method, and the corresponding abnormal image data is corrected according to the distance weighted interpolation method, and then the overlapping area between adjacent images is found, and the basic information is extracted from the file nam...
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The invention discloses a method for correcting abnormal data of a 1B level remote sensing image of a moderate resolution imaging spectrometer (MODIS), which is mainly used for solving the technical problems of the correction of numerical abnormity of an image element point and data abnormity of an image edge in the image. The method comprises the following steps of: finding out a part with image and latitude data abnormities at the edge of each stripe according to the data imaging characteristic of the MODIS; correcting abnormal latitude data and image data in a linear interpolation mode; and rapidly correcting other abnormal data through homonymic image element points of an overlap region between adjacent images. Abnormal data in the image is corrected rapidly according to the imaging characteristic of the MODIS data and the overlap of receiving regions of a digital video broadcasting-satellite (DVB-S) system for the abnormal data in a 1B level strip image of the MODIS. The method is simple and has high implementation efficiency and good correction effect.
Description
technical field [0001] The invention belongs to the technical field of remote sensing image data preprocessing, in particular to a method for correcting abnormal data in 1B-level strip images of Moderate Resolution Imaging Spectrometer (MODIS) received through a digital satellite broadcasting system (DVB-S) , using the imaging rules of MODIS data and the receiving range of DVB-S ground receiving stations and using the same characteristics of the overlapping area data to realize the method of fast correction of abnormal data in MODIS images. Background technique [0002] The Moderate Resolution Imaging Spectrometer (MODIS) is one of the important sensors in the Earth Observing System (EOS) program. It has the characteristics of high timeliness, wide coverage, and rich spectral information. information, and has a wide range of applications in sudden natural and environmental disasters. [0003] In order to improve the sharing level of remote sensing data in my country, with t...
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IPC IPC(8): G01S7/40G01S13/89G01S13/95
CPCY02A90/10
Inventor 施润和钟洪麟
Owner EAST CHINA NORMAL UNIV