CS 320 n Visual Programming Clusters and Images
- Slides: 10
CS 320 n –Visual Programming Clusters and Images
What We Will Do Today • Look at clusters in Lab. VIEW and start working with images Visual Programming Clusters and Images 2
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 3
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 4
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 5
Opening Images in Lab. VIEW • Lab. View 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 6
Picture functions • To open a picture in Lab. VIEW 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 7
Image is a Cluster • Lots of Data! indicates arrays Visual Programming Clusters and Images 8
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 Visual Programming Clusters and Images Right click on this output terminal 9
Class work • Link on the class web page to an image of the UT tower • how many pixels in the picture? (Find answer using Lab. VIEW, not some other graphics program) Visual Programming Clusters and Images 10
