create multiple ROI viewer c#/.net

[kumi]

hi

i am working on my engineer project and i have a few questions:

is it possible to create multiple ROI's into one viewer, give them a name and save them for the viewer (so each image loaded into that viewer has the previously declared ROI's)?

does anyone has a c# / vb example for this?

would be very nice

regards kumi

[TroubleTheShoot]

Hi Kumi,

unfortunately I am not a C# expert but I can give you some hints from my LabVIEW perspective. Things should be almost identical in C# when using the Vision Development Module's library.

Here is what I did:

 

1. Load an image and extract its luminance color plane (not necessary, just to make it work with the windows example pics)

2. Use the IMAQ select rectangle function to draw a rectangle on my image where I want the ROI to be.

(The ROI info output will be needed later on, notice the brown wire)

3. Convert the rectangle info to a ROI descriptor (so that the following function can process the info correctly)

4. Draw the ROI as an overlay over my image

Now I want to have the same ROI in future images at the exact same position. I will need to store that information somewhere to have it available in the future. I did this with the configuration file functions to create an INI file where I can create multiple sections (Here I only have one section called "Rect ROI") and write the ROI value keys into those sections. The brown wire is the ROI info that is bundled in a cluster. I unbundle this cluster to get the single elements in there.

 

When I later load a different file I can read out the INI file and apply the values to my overlay function or whatever function that expects ROI information to process on a specified area.

Hope this helps.

Best regards,

David

Message Edited by TroubleTheShoot on 03-16-2009 05:46 AM