Prev: textscan()
Next: Adding different sized matrix
From: Dalle Ali on 19 Jul 2010 06:57
hi guys,

i don't really sure if my problem already being discussed or not, but on the search tools i didn't find anything so here it is:

i have an .tif-image.. it belongs to uint16 and has width 1024 and height 516, so the grayvalues ranges from 0-65535... for some reason i want to manipulate each pixel and see what the new image will look like... for example the grayvalues within range 0-31000 will stay as it is, but the rest of the grayvalues will be manipulated with some equation...

can somebody please gives me a heads up on how to do it or any suggestions? any kind of help will be much appreciated ;)

cheers!
Dalle
From: us on 19 Jul 2010 07:17
"Dalle Ali" <tirtayasaonly(a)yahoo.com> wrote in message <i21b29$94h$1(a)fred.mathworks.com>...
> hi guys,
>
> i don't really sure if my problem already being discussed or not, but on the search tools i didn't find anything so here it is:
>
> i have an .tif-image.. it belongs to uint16 and has width 1024 and height 516, so the grayvalues ranges from 0-65535... for some reason i want to manipulate each pixel and see what the new image will look like... for example the grayvalues within range 0-31000 will stay as it is, but the rest of the grayvalues will be manipulated with some equation...
>
> can somebody please gives me a heads up on how to do it or any suggestions? any kind of help will be much appreciated ;)
>
> cheers!
> Dalle

a hint:

help find;
% eg,
img=magic(4);
ix=find(img>=13);
img(ix)=nan;
imagesc(img);

us
From: Dalle Ali on 21 Jul 2010 04:17
"us " <us(a)neurol.unizh.ch> wrote in message <i21c82$n6o$1(a)fred.mathworks.com>...
> "Dalle Ali" <tirtayasaonly(a)yahoo.com> wrote in message <i21b29$94h$1(a)fred.mathworks.com>...
> > hi guys,
> >
> > i don't really sure if my problem already being discussed or not, but on the search tools i didn't find anything so here it is:
> >
> > i have an .tif-image.. it belongs to uint16 and has width 1024 and height 516, so the grayvalues ranges from 0-65535... for some reason i want to manipulate each pixel and see what the new image will look like... for example the grayvalues within range 0-31000 will stay as it is, but the rest of the grayvalues will be manipulated with some equation...
> >
> > can somebody please gives me a heads up on how to do it or any suggestions? any kind of help will be much appreciated ;)
> >
> > cheers!
> > Dalle
>
> a hint:
>
> help find;
> % eg,
> img=magic(4);
> ix=find(img>=13);
> img(ix)=nan;
> imagesc(img);
>
> us

great! it works great! thx us ;)
 | 
Pages: 1
Prev: textscan()
Next: Adding different sized matrix