CS320n –Visual Programming

1. CS320n –Visual Programming Clusters and Images

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

8. Image is a Cluster • Lots of Data! indicates arrays 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 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) Clusters and Images