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Imaq Temperaturescale
SteffenT
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12-12-2006 09:19 AM
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Hello
I have two questions which I hope that they are quite easy to answer. But since I'm new to Labview I dont't know how to do this.
I use Labview to aquire images from an infrared cam. I partly do this by librarys provided for the camera and by the Labview Vision Tools.
The problem for me is, that I can not figure out how to show a temperature scale in the image. The values for displaying the image using the imaq array to image VI already are the temperature values. How can I create the scale inside the image? And how can I change the scale to show only a specific range while the programm is running?
Until now I'm using for all this an intensity graph but due to the further treatment of the image I would rather use an imaq image.
The other question is, how can I fix the imaq image in the frontpanel?
I have two questions which I hope that they are quite easy to answer. But since I'm new to Labview I dont't know how to do this.
I use Labview to aquire images from an infrared cam. I partly do this by librarys provided for the camera and by the Labview Vision Tools.
The problem for me is, that I can not figure out how to show a temperature scale in the image. The values for displaying the image using the imaq array to image VI already are the temperature values. How can I create the scale inside the image? And how can I change the scale to show only a specific range while the programm is running?
Until now I'm using for all this an intensity graph but due to the further treatment of the image I would rather use an imaq image.
The other question is, how can I fix the imaq image in the frontpanel?
Elmar_NI
NI Employee (retired)
12-14-2006 09:07 AM
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Hello Steffen,
you should use the histogramm function to display the intensity.
See link:http://forums.ni.com/ni/board/message?board.id=200&message.id=690&query.id=4232#M690
To display the intensity in the image its necessary to use an overlayer function.
http://forums.ni.com/ni/board/message?board.id=200&message.id=690&query.id=4232#M690
I do not understand exactly what it means: The other question is, how can I fix the imaq image in the frontpanel?
Kind regards,
Elmar
you should use the histogramm function to display the intensity.
See link:http://forums.ni.com/ni/board/message?board.id=200&message.id=690&query.id=4232#M690
To display the intensity in the image its necessary to use an overlayer function.
http://forums.ni.com/ni/board/message?board.id=200&message.id=690&query.id=4232#M690
I do not understand exactly what it means: The other question is, how can I fix the imaq image in the frontpanel?
Kind regards,
Elmar
SteffenTe
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12-14-2006 04:49 PM
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Hello Elmar,
thank you for your answer.
The two links you sent me are both the same. I don't think this was supposed to be?
Still I don't know how the histogramm can help me showing a temperaturescale.
In case I consider something differenterent a temperaturescale I have attached a picture including one.
Thanks in advance.
Steffen
thank you for your answer.
The two links you sent me are both the same. I don't think this was supposed to be?
Still I don't know how the histogramm can help me showing a temperaturescale.
In case I consider something differenterent a temperaturescale I have attached a picture including one.
Thanks in advance.
Steffen
Elmar_NI
NI Employee (retired)
12-15-2006 09:39 AM
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Hello Steffen,
sorry for the wrong overlay link.
http://zone.ni.com/devzone/cda/epd/p/id/623
One way to compare rgb values with temperature is to create a temp. scale.
For example an temp. scale from 000000 to FFFFFF (black to white).
And a second row with the temperature value (-> for example 10FA23= 30 ° C).
Then you are able to get the rgb value form a pixel or roi in the image and calculate the temperature about the index in the array.
Elmar
sorry for the wrong overlay link.
http://zone.ni.com/devzone/cda/epd/p/id/623
One way to compare rgb values with temperature is to create a temp. scale.
For example an temp. scale from 000000 to FFFFFF (black to white).
And a second row with the temperature value (-> for example 10FA23= 30 ° C).
Then you are able to get the rgb value form a pixel or roi in the image and calculate the temperature about the index in the array.
Elmar
