Azzera filtri
Azzera filtri

How to change pixel values of background to zero

4 visualizzazioni (ultimi 30 giorni)
Kavitha Srinivasan
Kavitha Srinivasan il 18 Giu 2013
I have an gray image as uint16. the background of the image (air region)has got some pixel values. I want to make them all zero. Any idea how do do it? Your help is much appreciated. Thanks

Accedi per rispondere a questa domanda.

Risposta accettata

Matt J
Matt J il 18 Giu 2013
How about
image(image<airthreshold)=0;
  2 Commenti
Kavitha Srinivasan
Kavitha Srinivasan il 18 Giu 2013
thanks for your reply. But how to get the airthreshold value?
Matt J
Matt J il 18 Giu 2013
Modificato: Matt J il 18 Giu 2013
That depends on noise and what's going on in the rest of the image. In one of your tags, you seem to say that this is a CT image. In my experience, anything below 500 HU can usually be classified as air, but extreme noise-levels could change that.

Accedi per commentare.

Più risposte (0)

Categorie

Scopri di più su Startup and Shutdown in Help Center e File Exchange

Tag

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by