The following are instructions on how to run the applets which are part of the HIPR package. These applets are designed to allow the user to try out the operators which are outlined in the worksheets.
You may want to review the general instructions first, which gives a demonstration overview, JAVA details, browser details, known bugs, etc.
Source for this operator.
The top pull down menu allows you to select what sort of noise should be added to the input image. This can be either of type Gaussian or of type Shot.
If Gaussian is selected, the Gaussian side of the interface becomes active and a standard deviation of the Gaussian noise can be entered.
If Shot is selected then the Shot side of the interface becomes active. When this happens you can then go on to select either Partial or Full shot noise. Partial shot noise is where a random greylevel value is generated to replace a pixel, and Full shot noise is where either 0 or 255 is used to replace a pixel. In either case each pixel in the image is changed with a probability equal to that entered in the box below this pull down menu.
The output is displayed to the right of the input image.
Pressing the green start button causes the operator to run. Pressing the Stop button causes the operator to stop running. This is useful if the system being run on is very slow and the operator is taking a long time to complete.
The time box shows the amount of time which the operator took to complete the process on the input image.
You can inspect the input and result image pixel values by depressing the left mouse button and moving the cursor over the desired pixel. The pixel coordinates and gray-level value are displayed underneath the image. Note that some images are larger than the displayed 256x256 display window. Larger images are subsampled in an appropriate manner.
You can find out about known problems with the system here.
©2003 R. Fisher, S. Perkins,
A. Walker and E. Wolfart.