Re: help_standardizing images

Posted by Gabriel Landini on Apr 24, 2007; 8:23pm
URL: http://imagej.273.s1.nabble.com/help-standardizing-images-tp3699688p3699694.html

 Frederick Ross wrote:
> by hand won't be that onerous.  I assume your card's histogram is just
> going to be scaled and offset, not distorted.  If it is, then you have
> to do something more sophisticated (search on 'histogram
> equalization'...it's not hard, it's just not as simple).

I think that you are describing more histogram stretching rather than
equalisation.

Shouldn't one sample all the greys in between too and then fit a function that
is applied to the image?

Assuming that the sensor is linear may not be a very valid assumption.

Cheers.

G.