Image Analysis

[Yambito]

Hello Friends

I am new in vision Labview toolkit.and I am interesting in developing a  webcam acquisition program. I can acquire the images, however I can't process that in order to get the distances of a movement object. I don't Know.....

How I can began to process the image to acquire the distance of the object in motion?

Is necesary to define a ROI ? What is the reason?

What VI I have to use to choose a pair of edges to define an object distance?. Is posible to use the mouse?.

Is necesary calibrate the images?. How I can do this?

Please, give an idea of how to began to do my program

PABLO

[akokot]

Hi Pablo,

If you are new in Vision I will suggest you to start with the examples. The Vision Assistant is another tool that can help you in the beginning.

The first thing you must do is find the object in the picture. You can do it many ways. Pattern Matching, Circle Detection, Shape Detection, it's all depends of your setup.

Take a look in this tutorial. This can help you in your application.

http://zone.ni.com/devzone/cda/tut/p/id/2843
http://zone.ni.com/devzone/cda/tut/p/id/3206

Best Regards,
Alisson Kokot
NI BRAZIL

[Yambito]

Hi Alisson,

Thank you for answer me. I have seen the examples in Labview, however that are very complicated to understand. I can aquire the image but I don't know the way to began to process the webcam image to obtain the distance from the object. I present you my block diagram. How I can began to do my program?. What VI's I have to use to began to process the images?.

Help me please, I will be very thankfull

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Escrito por akokot:
Hi Pablo,

If you are new in Vision I will suggest you to start with the examples. The Vision Assistant is another tool that can help you in the beginning.

The first thing you must do is find the object in the picture. You can do it many ways. Pattern Matching, Circle Detection, Shape Detection, it's all depends of your setup.

Take a look in this tutorial. This can help you in your application.

http://zone.ni.com/devzone/cda/tut/p/id/2843
http://zone.ni.com/devzone/cda/tut/p/id/3206

Best Regards,
Alisson Kokot
NI BRAZIL

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[akokot]

Hi Pablo,

It's a little difficult to answer your question. Only you know your application, it's specifications and requirements.

I strongly suggest you to take a look on Vision Assistant. It's a great tool do start your application and you can generate LabVIEW Code from it. You can find a lot of information in Developer Zone. There are tutorials and example code to LabVIEW and others NI products.

Then, if you have more specific question, feel free to ask NI again.

Best Regards,
Alisson Kokot
NI BRAZIL

[Yambito]

Hi Alisson

Thank you for answer me again. I reviewed the labview examples and That seems as I want to do in my program. The information in NI Developer Zone is good too. Good Lucky for you.

Best Regards for you!
PABLO