ROI

[nomuhr]

I have detected a circular object now i want to extend its radius and make that the ROI.

[Logic]

DO IT.

[nomuhr]

I have tried to do this in Vision and in the VI but was unsuccessful in both.  Does anyone know how I could do this.

[Logic]

Hi,

Can you explain your problem in more detailed manner. I could not understand much from your earlier postings. Here are my suggestions based on my understanding so far.

1. You have detected some circular object. ( it might be more useful if you could say how did you find that. or else what form your image is now. I could able to guess that you might have a binary image with a particle of circular shape).
2. Now you want to increase the radius - ( which radius? - radius of your circular object in the image? or only the ROI?)
• If you want to know the radius - use circular edge detector, if you have so many particles use particle ananlysis and get the radius of the required particle. then add a number to it.
• If you want to increase the ROI - use the same increaed radius, and use functions like convert circle to ROI in the ROI pallates and create the ROI as you want.
3. Vision - you mean the vision assitant? I believe you cant do much of custom modifications using the vision assitant. you can create your basic vi from that. Go on building your vi from that.

Please spend sometime in explaining your problem clearly, so that people can help you. All the best.

Thanks,

logic

[nomuhr]

I started off with a gray scale image which I performed some operations on and converted into a binary image.  From this image I then extracted a circular region with a binary circle detector.  The circular image that I have found I would like the center to be the center of my ROI with a radius greater than that of the circular object I have already found.

[Logic]

Hi,

Well. I am not sure how you extracted a circular region? Did you masked it? Can you post you VI and the image if possible. I guess if you have used the IMAQ Extract then you just need to shift coordinates based on the result.

Thanks,

logic

[nomuhr]

here is my VI and an Image

[nomuhr]

How do i add attachment?  I have added them in the attachments area but when i post they do not appear on in my message.

[Logic]

Hi,

You have to browse and select the file. You may not be able to attach the folder, but file you should be able to attach. Select each file separetly and attach using "Add additional attachment". try again.

logic

[nomuhr]

Here are my files.

Message Edited by nomuhr on 11-17-2005 09:51 AM