Multi-scale characteristics of remote sensing lineaments

Lineaments whose dominant azimuth reflects the basic framework of regional structure are mainly related to faults, but their spatial morphology and characteristics are different at different scales. The changing characteristics of multi-scale lineaments extracted by wavelet edge detection are quantitatively analyzed through image characteristics, azimuth characteristics, histogram, box-plot and paired-samples T test. As the result, the difference of "proportion of NE structure" in different areas becomes more and more significant with the increasing of wavelet transformation scale. Three geological variables extracted based on wavelet edge image of Level 3, "proportion of NE structure", "density of NE structure" and "entropy", are synthesize by factor analysis, then the results show that the distribution of the values referring to the "dominance of NE structure" are basically consistent with the structure framework of Huize lead-zinc mine area, that is, the dominant position of NE lineaments in the triangular region enclosed by the large main faults such as Kuangshanchang Fault and Qilinchang Fault is the most obvious. The potential relation between remote sensing lineaments and actual geological structure can be found through multi-scale edge detection and characteristics analysis.