1. CS320n –Visual Programming
Clusters and Images

2. What We Will Do Today
Look at clusters in LabVIEW and start working with images
Visual Programming
Clusters and Images

3. Clusters
Arrays are used to hold many elements that are of the same data type
A cluster is used to hold together data of different types
normally fewer elements than an array
but some of the elements may be arrays themselves
Visual Programming
Clusters and Images

4. Cluster Example Take a name and an age and put them together
Name = string
Age = int
The “Bundle” function is used to group together different elements into a cluster
number of input can vary
drag down on button of function to add more inputs
Visual Programming
Clusters and Images

5. Creating a Cluster Bundle Function
Clusters can be used to reduce the number of wires in a diagram.
Like a high level view of data.
Analogous to high level methods / functions in Alice.
Visual Programming
Clusters and Images

6. Opening Images in LabVIEW
LabView provides a way to open image files
jpg, png, and bmp are image types
different ways of saving an image on a computer
Specify location of image with a path control
Visual Programming
Clusters and Images

7. Picture functions
To open a picture in LabVIEW use a path control and wire to a Read JPEG File function
Note the output on the Read JPEG File function
Visual Programming
Clusters and Images

8. Image is a Cluster Lots of Data! indicates arrays Visual Programming
Clusters and Images

9. Looking at the Raw Image Data
Use an Unbundle function and an array indicator in the image cluster
right click on image output and select create -> indicator
Unbundle
Right click on
this output terminal
Visual Programming
Clusters and Images

10. Class work Link on the class web page to an image of the UT tower
how many pixels in the picture? (Find answer using LabVIEW, not some other graphics program)
Visual Programming
Clusters and Images