You should be able to insert almost any kind of graphics image into a LaTeX file, but there are some details to pay attention to. High resolution images such as .eps and .pdf files can be handled, but also fixed resolution formats such as .gif, .png, and .jpg.
If you have a graphic image in encapsulated PostScript format (file extension .eps), you can easily incorporate it into a LaTeX document following the examples below. Encapsulated PostScript differs from basic PostScript in that the file includes a Bounding Box, which tells how large the graphic image is and also includes a bitmap version of the graphic, which makes it easier for some programs to display a preview of the graphic on a computer screen.
This package is described in The LaTeX Graphics Companion. The example below tells how to incorporate .eps, jpg, .png, and .gif files into your LaTeX document.
This package is a bit older than the graphicx package described below and is slightly more limited. It is described in The LaTeX Companion, so you may be able to find information about it.