ADIL Browser
ADILViewerApplet is an applet that uses the Horizon classes to browse
images from the NCSA
Astronomy Digital Image Library (ADIL). The applet contains two
displays, side by side. The left side is used to display the full
image sub-sampled to fit within display region. The right side
contains a "zoomed" sub-region of the image. One can click the mouse
over a pixel in the left display to see a zoomed version centered on
that pixel in the right display.
Below the two displays is a position display panel which tracks the
sky position corresponding to the current position of the mouse. One
can also pop-up the image's FITS header by clicking on the adjacent
button.
The zooming factor can be changed by clicking the on one of the
buttons below the position display or by entering a percent factor in
the text field. A factor 100% means that one data pixel is displayed
into one display pixel. Alternatively, one can enter choose the
"Region" button; this allows one to draw a box in the left display
indicating the region to appear in right display.
This example image is a view of the center of our Galaxy at radio
frequencies. For more information, check the
Preview Page for this image at the
ADIL.