imaq light meter

[Arjun247]

For a light meter function in labview, whcih plane should be extracted.

Should it be luminance plane or intensity plane. What would be ideal.

Arjun

[Hornless.Rhino]

There's actually a light meter IMAQ block,

look in the "Measure Intensities" palette

There is a point,line and rectangle one available, from the description of the rectangular one "Measures the pixel intensities in a rectangle of an image."

[muks]

C:\Program Files\National Instruments\LabVIEW 8.0\examples\Vision\2. Functions\Light Meter\Light Meter Example.vi

Check this example 

or see here  

[Arjun247]

Guys

I definitely know we have to use imaq Light meter function.

What I am asking is that since we get a color image from

most of the cameras, what plane should we extract and pass

on to the imaq light meter function. is is luminac plane or intensity plane.

WHat if I have a black & white camera, how do I get the intensity plane.

I hope everyone understood what I meant

[muks]

I always extract the luminance plane to convert a color image to a greyscale one.