[Index] [Prev] [Next] [Bottom]


Chapter 7: Animation

JHV presents 3D images as a series of 2D cross-sectional slices cut along a user-selected axis. The animation tools enable you to view the 3D image by playing the sequence of 2D images as an animation.
7.1 Opening the Animation Window
7.2 Animation Options and Color Management


7.1 Opening the Animation Window

Animations can be prepared from two types of data sets:

8-bit raster images
To display 8-bit raster images in animation, first set Animation from the main window View menu, then click on a folder containing a set of 8-bit raster images. The animation window will appear, with the animation panel on the left and a control panel on the right.


Figure 7.1 The animation window
3D SDS arrays
A 3D SDS array is presented by first slicing the data set along a user-selected axis. Each slice is viewed as a separate 2D image and the sequence of slices represents the full 3D image.


Figure 7.2 Slice Selection Window

When you first select a 3D SDS, JHV will present a slice-selection window. Choose the X-, Y-, or Z-axis. The Slice Selection field to the right of the X Slice button will state how many slices will be created; the text window displays the number of the current slice, which is displayed in the image preview panel. You can select a slice with the slidebar or by typing a valid entry, a number within the range specified in the Slice Selection field, in the text window.

Warning: The user should be aware that animation through the array in any order other than the natural storage order will be slower, possibly very much lower.

Click on the preview image to open the image window. Click on the image window Animation button to open the animation window illustrated in Figure 7.1.

7.2 Animation Options and Color Management

JHV provides several tools for structuring and manipulating animations. These are controlled through the image selection window, buttons, slidebars, and a pull-down menu inthe right half the animation window:
Image selection window
Click on individual images, or slices, to select them for the animation.
Select All
Selects all elements listed in the image selection window.
Unselect All
Deletes all elements listed in the image selection window from the animation list.
Forward and Backward
These buttons play the animation forward or backward.
Next and Previous
These buttons display the next or previous image in the animation sequence.
Stop
Stops the animation.
Dismiss
Closes the animation window.
Frame(s): (a slidebar)
Displays the selected image in the sequence.
Speed (ms): (a slidebar)
Sets the speed at which the animation is played.
Loop, Single, and Bounce (in a pull-down menu at the bottom of the window)
Sets the type of animation to be played.
Loop plays the animation in a repeating loop, always running in the same direction.
Bounce plays the animation repeatedly, but changing direction each time it is played -- forward once, then backward, then forward, etc.
Single plays the animation one time.

There are also two buttons for accessing the JHV color management tools:

Edit Palette
Opens the palette editor.
Update Palette
Updates the images with the new palette from the palette editor. (Performs the same action as Set Palette on the image window Palette menu.)


[Index] [Prev] [Next] [Bottom]


NCSA
The National Center for Supercomputing Applications

University of Illinois at Urbana-Champaign

hdfhelp@ncsa.uiuc.edu