How to export XY Graph as PNG?

[chrisl03]

I am exporting the results of an XY Graph as an image using the Export Image Invoke Node. This method only allows users to export as .bmp, .emf, .eps, and .pict. I want to export a .png, so I worked around this issue by writing the .bmp file, reading its image data, deleting the original .bmp, and replacing it with a .png (using Read BMP File.vi and Write PNG File.vi). If possible, I would like to avoid ever having to write the .bmp, as it is about 15-20x the size and just takes up extra time for a file I am never going to use. Is there a better way to do what I am trying to do?

I have attached my VI in case my process wasn't clear enough (sorry for the mess of wires)!

[zou · Accepted solution]

Use invoke node Get Image instead of Export Image.  Then you can use Write PNG File.vi

[chrisl03]

That's perfect. Thanks so much!

[crossrulz]

Just to add some details, here is a snippet of a VI I keep in my reuse library.  It does use two other VIs from my reuse, but I added notes to state what they do.