Abstract:

Illustrated by the case of Wulukesayi district in Xinjiang Uygur Autonomous Region, we identify lithology by analyzing the WorldView-2 remote sensing image data. On the basis of analyzing the measured spectral curves of different lithologies, aiming at a series of problems arising in the process of lithology identification, such as weak chromatic aberration between different lithologies, shallow cover of the rock surface and different objects with the same spectrum, we determine the optimum band combination according to the band characteristic and statistical features of high spatial resolution WorldView-2 data. The high correlation between bands is reduced by using the method of principal component analysis. On that basis, by conducting contrast enhancement and texture enhancement processing,we improve the contrast between different lithologies and eliminate the interference of external factors on the spectral information, which provides a reliable basis for the precise identification of different lithologies.

Key words: WorldView-2 data, spectral curve of lithology, optimum band combination, difference enhancement of lithology, texture enhancement, Wulukesayi district in Xinjiang