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.
There are two pull down menus. The first allows you to choose which direction the pixels in the image are shifted.
The second menu allows you to choose whether the bit being shifted into is filled by 0 (No Wrap) or by the bit being shifted out the other side (Wrap). In the box labeled `Shift value' an integer can be entered which allows you to determine how far the bits are shifted in the image.
Bitshifting may produce images that are difficult to see. Scaling and Offset values can be entered to allow you to rescale the images yourself, according to Output = Scaling*Input+ Offset. Image arithmetic may produce images with values less than 0 or greater than 255. These values are clipped to 0 and 255.
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.