VO_IMPAT:中国虚拟天文台图像处理分析工具

中国虚拟天文台图像处理分析工具（VO_IMPAT），是由国家天文台虚拟天文台项目组开发的一项服务，它提供了对数字巡天图像数据（Digital Sky Survey，DSS）、天文星表以及其他数据库的交互访问。VO_IMPAT的设计目的是实现多波段天文数据的融合。可以将不同波段的星表叠加到DSS底图上，如光学波段的USNO星表、近红外波段的2MASS星表、射电波段的NVSS星表和X射线波段的RASS星表。同时VO_IMPAT还可以对图像进行放大、缩小、伪彩色、等高线、直方图、尖锐化、平滑化、旋转等处理，不同的星表数据可以采用不同的颜色和图标显示。

VO_IMPAT: Image Processing and Analysis Toolkit for the Virtual Observatory of China

The Image Processing and Analysis Toolkit for the Virtual Observation(VO_-IMPAT) of China,developed at National Astronomical Observatories,is a service providing simultaneous access to images of the Digital Sky Survey(DSS),astronomical catalogues,and other databases.The devising aim of VO_-IMPAT is to federate multi-band astronomical data and to overlay catalogues from different bands upon the image of DSS,such as USNO,2MASS,NVSS,RASS catalogues.At present the aim has been realized.VO_-IMPAT provides many essential image processing functions,which include zooming in and out,changing color-maps,contours,drawings,histogram,smooth,sharpen,rotate,tag and so on.Moreover different catalogues can be displayed with dissimilar colures and symbols.