Sending Processed Image Stream to Dashboard?

[Censen.Morris]

Thanks for the quick reply.

We are trying to put the code in the vision assistant created VI into the Vision Processing VI. We were only trying to view the processed image on the dashboard to help us trouble shoot our vision tracking system which would return the distance the robot was from the scoring peg. So let me explain our code:

First we modeled our design off of the “Vision Target Tutorial.” We set up the NI Vision Assistant to use the Brightness function to filter the image to essentially black and white. From there we used the “Shape Detection” function to search the image for ellipses (we didn’t go with rectangles just because the poor image quality did not define the pieces of tape well enough to be identified as rectangles). This returned the Center X’s and minor radii of each tape piece which gave us enough information to develop the algorithms for calculating the distance.

Okay here were the problems we ran into:
First, in the vision assistant part, we could not use the RGB-32 bit images the webcam was outputting, since the “Shape Detection” function said that it could only use binary, or 8-bit images. We got it work by using Photoshop to save an image into a grayscale 8 bit bitmap (we tried saving it as an 8-bit color bitmap but vision assistant kept reading it as a 32-bit image). But we were not sure how to convert the images into the right type within LabView.

Second, we were not quite sure how to integrate the vision assistant VI into the Vision Processing VI or whether that was the right place for it. I attached a screenshot of what we did. More specifically we were not sure how to unbundle the wire from the Vision Assistant VI. We used a 1-D split array VI then an array to cluster, then unbundle cluster functions to separate the individual data. I wasn’t sure whether we needed the 1-D split array and how the number of matches wire from the Vision assistant VI fit into it, and how to know what data is for what detected shape. From there we ran the minor radii data and the center x data into a vi that we created that calculated the distances, and originally ran that into the necessary functions described in the Custom dashboard tutorial, and put a field on the dashboard, but when we ran it only a “int” was being displayed. Then to trouble shoot we wired the minor radius value from the cluster unbundle to the dashboard, but it now just displayed a 0 (this setup is what is shown in the screenshot).

So thank you for replying to our previous posts and see if you can provide any input on these issues.

heres the screenshot if it didn't attach http://www.rmhsrobotics.com/overview.jpg


Thanks.