Re: MTrack2

Posted by Gabriel Landini on May 01, 2009; 7:27am
URL: http://imagej.273.s1.nabble.com/MTrack2-tp3692712p3692715.html

On Friday 01 May 2009 05:00:31 Aryeh Weiss wrote:
> Thank you for your quick reply. I tried this -- it appears to be equivalent
> to selecting the dark background checkbox during apply threshold.

No. That option will also affect all other binary operations too.
(otherwise dilate and erode, etc are inverted).

> However, MTrack2 still fails in this case.

I see, well, it was worth a try.

> The interesting thing is that if I use the black background option, then
> MTrack2 fails, but if I then invert the LUT, them MTrack2 works. One would
> think that the LUT should play no role, because the image values do not
> change.

Yes, I see the inverted LUT as a source of eternal confusion.
>
> Essentially, I can have two images that are identical, except that one
> displays 255 and black and 0 as white, while one displays 255 as white and
> 0 as black, and get two different results. That is strange.

As I said above...

Cheers,

Gabriel