密度分层组合合成技术及影象地质解译

密度分层组合成技术是通过对遥感图象密度层次的分折,以突出影象的结构信息为主的一种光孚图象处理方法。根据不同密度层次的多波段遥感图象具有不同类别结构的“信息丰度”的原理,通过对分层片的组合处理,比较成功地对影象信息进行增强和提取,从而获得较好的地质解译效果。实践表明,它不仅对构造解译是有效的,而且对地层、岩性解译也是可行的。在矿床、矿田构造解译力面,它可以获得一些以前没有被认识的信息。本文是基于对我国某铀矿田的卫片进行密度分层处理和解译,提出了矿田受菱形断裂构造块体控制的看法。它对认识铀矿田的构造特点,指导找矿是有一定意义的。

COMBINATION AND SYNTHESIS TECHNIQUE OF DENSITY HIERARCHY FILM AND ITS IMAGE INTERPRETATION

Combination and synthesis technique of density hierarchy film is an optical and electronic processing technique which draws on the experience of the relative masking technique and highlights texture information of images. According to the PrinciPle that multiband remote sensing images of different grade density possess different texture information abundance, by means of combination of density hierarchy film useful image information has been successfully enhanced and extracted with good results in geological interpretation. Practice indicates that the combination and synthesis technique of density hierarchy film is not only effective on structure interpretation but also feasible for stratigraphic and lithologic interpretation. Based on image processing and interpretation of some ore-fields in China, we can acquire some new information which was unknown previously. Accordingly we put forward a new idea that the location of uranium ore-fields is controlled by a rhombic fault block. In a certain sense, it is helpful to summarizing structure features of uranium ore-fields and guiding selection of exploration areas.