Sloan Digital Sky Survey
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Image Processing
 What is an Image?
 Software
 Retrieving Images
 Analyzing Images
 Tricolor Images
 Other Images
 Asteroids
 Other Features
 Alternate Views
 Conclusion
 Your Results

Image Processing Software

Before you can download images from SDSS, you will need a program to view them. A good freeware program called Iris is available for download on the Internet. You can download it from the IRIS Home Page.

Scroll down to "How to install version 5.59...," then click the "IRIS.ZIP" link below it to download the file iris.zip. You will need to unzip it using a program such as StuffIt. After the program is unzipped, click on the file "iris.exe" to launch Iris.

When you launch Iris, you will see the screen similar to the screen shown below:

Next, you need to set up Iris so it knows where to find the pictures you want to use. Click on File and then Settings. The following window will appear.

If you plan on getting your images from a CD-ROM, be sure the drive letter is correct. Change the working path to the directory where you plan to store your images. You might create a directory with your name to store your images. Change the working path to c:\MyName\

Fits files can have a file type of either .fit or .fts. The rest of this project will use the .fits extension, which can be opened by IRIS only if you select FIT. Make sure that the File Type is set to FIT, then click OK.

Now, you need to get some images to analyze!