Linear Fit question

[aworonow]

If I set a linear image as the reference image, and apply LinearFit to another linear image, is the resulting image also linear? I would presume so, as long as "linear fit" means first-order linear. But not sure.

Is there a PI tool I could have used to answer my own question?

Thanks, Alex

[RickS]

If I set a linear image as the reference image, and apply LinearFit to another linear image, is the resulting image also linear?

Yes, the result will be linear.  LinearFit applies a linear fitting function of the form y = a + b*x (see http://pixinsight.com/forum/index.php?topic=2302.msg15289).

Is there a PI tool I could have used to answer my own question?

A poke around with the readout mode cursor, perhaps?

Cheers,
Rick.

[aworonow]

Thanks, Rick.