achieve selection of ROI by mouse

[FT]

I was trying to find out whether Vision Builder will suffice for what I need to do but the description was not too clear. I need to read images from std image format files (BMP, etc) and AVI movie files, display the images in a nice interactive manner, with the ability to select an ROI with a mouse, and convert the image data into arrays for quantitative processing (FFT, statistics, nothing too fancy). I am not planning to do image acquision with LabView at this point. I have LabView 6.0.2 development version and I would like to understand whether I need the IMAQ Vision (seems like an overkill?) or Vision Builder? Thanks

[Michael Noll-Hussong]

You can open images of different type with IMAQ Vision Builder, draw ROIs on them and do some analysis. You can save your results in Excel or use a native spreadsheet format. You cannot use IMAQ Vision to open AVI files.
Hope that helps.

[Kyle_V]

You won't be able to convert your image into a 2D array from Vision Builder, but from what I read, everything you need to do can be accomplished with a simple LabVIEW program with IMAQ Vision. There is an example program on the Developer Zone that shows how to read an AVI file into several IMAQ Image files. That's probably your starting point. To find it, just type in "imaq avi example" into the search field of ni.com. Once you have the AVI file converted into several IMAQ Images, then you should be able to use the IMAQ Select Rectangle VI to allow a user to set a ROI. After that, just call the IMAQ ImageToArray VI to convert the ROI to a 2D array of pixel values. Or better yet, you can use the IMAQ FFT VI or any of the other Image Processing functions that come
with IMAQ Vision.

If you have any questions about the features of IMAQ Vision, please feel free to contact us at www.ni.com/ask.

Kyle V
Applications Engineer
National Instruments

[aljuboori]

Hi,

I used NI Vision Builder Version 3.5, I need to build flexible mouse selection for ROI (Region of Interest) inside Vision Builder.

Please, How can I use Create Region of interest step or any other steps to achieve selection of ROI by mouse?

Waiting your generous replay

Thanks

haider