what does the IMAQ Cast Image VI do exactly?

[Doubutsu]

Hi everyone,

I want to convert a RGB image to grayscale. By now I can do this, using the IMAQ Cast Image VI. But now I was wondering what exacly does this VI do? How does it make a grayscale image from the RGB image? What is happening under the hood?

Hope someone can tell me, since I really can't find it. Thanks in advance ^^.

[Ranjeet_Singh]

Simply does typecasting. 

Converts the current image type to the image type specified by Image Type

[Doubutsu]

thanks you very much for answering, but actually I wanted to know how the VI does this. Would you happen to know that to?

Thanks in advance.

[udka · Accepted solution]

For each type conversion there is specific operation. In your case The VI sets the destination value to the average of the three color components of the source.
For more:
http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/casting_images/

[Doubutsu]

thanks a lot, I guess that was where I was searching for.