Knowledge-Based Enhancement of Low Spatial Resolution Images

Xiao-Zheng LI  Mineichi KUDO  Jun TOYAMA  Masaru SHIMBO  

IEICE TRANSACTIONS on Information and Systems   Vol.E81-D   No.5   pp.457-463
Publication Date: 1998/05/25
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Image Processing,Computer Graphics and Pattern Recognition
remote-sensing image,  super-resolution method,  image processing,  knowledge-based classifier,  

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Many image-processing techniques are based on texture features or gradation features of the image. However, Landsat images are complex; they also include physical features of reflection radiation and heat radiation from land cover. In this paper, we describe a method of constructing a super-resolution image of Band 6 of the Landsat TM sensor, oriented to analysis of an agricultural area, by combining information (texture features, gradation features, physical features) from other bands. In this method, a knowledge-based hierarchical classifier is first used to identify land cover in each pixel and then the least-squares approach is applied to estimate the mean temperature of each type of land cover. By reassigning the mean temperature to each pixel, a finer spatial resolution is obtained in Band 6. Computational results show the efficiency of this method.