Converting a 2D Boolean array to bmp file

[clg6621]

I am trying to save a 2D Boolean Array as a 1 bit (black and white) .BMP file, but I am not having any luck. Does anyone have any suggestions on how to do this? I am trying to use the Flatten Pixmap.vi and Write BMP File.vi but it isn't working.

Should the Color Map input to the Write BMP vi be a 2 element array w/ one element being Black and the other being White? If not, what exactly does the Color Map input do?

I've attached a sample of what I'm trying to do. Can anyone tell me why it isn't working? Thanks!

[Bob_Y.]

Actually, after I added the data to the controls, it worked fine for me. Maybe you have failed to properly intitialize the controls to the proper values? Or maybe it is a problem with your version of LabVIEW. I have LabVIEW 7.1 and I see from the VIs that you are using, that you probably have 6.1.

Make sure that your "color table" only has two values (0=Black and 1=White) and the falses will be black (0) and the trues will be white (1).

Again, it worked for me so maybe there is a problem with the calling VI, the data that is being sent, or the version of LabVIEW.

I hope that this helps,
Bob Young

[clg6621]

It does work! 🙂

I was not doing the color table correctly. I am new to LabVIEW, so I am having to learn a lot as I go....

Thanks for the response!

--Chris

[Philip_Courtois]

It works fine for me too. Only thing I had to specify was the correct colors in the color table and then make sure not to point at an existing BMP-file.

Please see the revised example I attached. Notice that I saved it with default values so you can reproduce instantly. I saved the VI for your version; 6.0.


I hope this answered your question.

Best regards,
Philip C.
Applications Engineer
National Instruments
www.ni.com/ask