GALSIM is a collaborative, open-source project aimed at providing an image
simulation tool of enduring benefit to the astronomical community. It provides
a software library for generating images of astronomical objects such as stars
and galaxies in a variety of ways, efficiently handling image transformations
and operations such as convolution and rendering at high precision. We describe
the GALSIM software and its capabilities, including necessary theoretical
background. We demonstrate that the performance of GALSIM meets the stringent
requirements of high precision image analysis applications such as weak
gravitational lensing, for current datasets and for the Stage IV dark energy
surveys of the Large Synoptic Survey Telescope, ESA's Euclid mission, and
NASA's WFIRST-AFTA mission. The GALSIM project repository is public and
includes the full code history, all open and closed issues, installation
instructions, documentation, and wiki pages (including a Frequently Asked
Questions section). The GALSIM repository can be found at
this https URL .

GALSIM 是一个开源项目，旨在为天文学研究提供图像模拟工具。其包含一些生成天体图像的软件库，可以以多种方式处理图像转换和操作，包括卷积和渲染等。GALSIM 满足高精度图像分析应用（如弱引力透镜）对性能的严格要求，并已应用于许多大型引力天文学调研项目。