Setting Area, finding Edges and adding Label

Programming Questions
2

Hi George,

there are a lot of examples here in the forum that show you how to add overlays to a Display, for example:

https://forum.commonvisionblox.com/t/how-to-add-overlay-objects-to-display-from-a-worker-thread-in-c/484/2

If you are not shure on how to use the Edge tool, try checking the documentation first:
https://help.commonvisionblox.com/NextGen/14.0/md_scripts_main__a_p_i__overview.html

This should be pretty straight forward.

Now, what you want to do is add another Display to show the resulting image, am I right?
If so, you have to have another displayControl or change the following line:

display.Image = value?.DeviceImage;

to not show the DeviceImage but the image you get from whatever processing you have done.

Your Edge Method call should look something like this:
FindFirst(ImagePlane, EdgeSearchMode, EdgeType, Double)

To explain you where the ImagePlane overload of the method comes from you have to take a look at the getting started once again, especially the part with the async processing:

https://forum.commonvisionblox.com/t/getting-started-with-cvb-net/246/10

Here is the interesting part:

private async void grabCheckBox_CheckedChanged(object sender, EventArgs e)
{
  if (grabCheckBox.Checked)
  {
    Device.Stream.Start();
    openButton.Enabled = false;
    try
    {
      while (grabCheckBox.Checked)
      {
        using (StreamImage image = await Device.Stream.WaitAsync())
        {
          // processing
        }
      }
    }
    catch (OperationCanceledException)
    {
      // acquisition was aborted
    }
    finally
    {
      openButton.Enabled = true;
    }
  }
  else
  {
    if (Device.Stream.IsRunning)
      Device.Stream.Abort();
  }
}

After you called the WaitAsync(), you have an image that you can use as argument for your edge tool, well not exactly the whole image but image.Planes[0] (for mono cameras) for RGB cameras just pass the index of the plane you want to use for processing.

I will also update my Example here
https://forum.commonvisionblox.com/t/getting-started-displaying-multiple-cameras/1508
To have another display that shows some image that is a result of some filter call or something like that.

For now I see, that you are making progress with the Forms approach so just stick with it but if you have time… just give my example a try.

Cheers
Chris