LabVIEW has a VI that allows you to read jpeg files, and is located in the function palette:
Graphics & Sounds -> Graphic Format -> Read JPEG File.vi
If you can save your string in a jpeg file, LabVIEW can interpret it.
Use the VI "Draw Flattened Pixmap" to display your image in a picture indicator. You may want to review the following example:
Reading from JPEG/PNG/BMP Images into a LabVIEW Picture Control
http://zone.ni.com/devzone/devzoneweb.nsf/opendoc?openagent&0431FFD466D3E2988625683A000B8401&cat=D34BD2FC1A9B06708625688B00729CC4
Best regards;
EJV
www.vartortech.com