Re: Digital Image Processing: showing graylevel images in
- To: mathgroup at smc.vnet.net
- Subject: [mg64219] Re: [mg64208] Digital Image Processing: showing graylevel images in
- From: "Maarten van der Burgt" <maarten.vanderburgt at icos.be>
- Date: Tue, 7 Feb 2006 03:35:45 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
I forgot one fairly essential sentence in my first mail. I added it below
after: >>>>!
Maarten
"Maarten van der
Burgt" To: mathgroup at smc.vnet.net
<maarten.vanderburg cc:
t at icos.be> Subject: [mg64219] [mg64208] Digital Image Processing: showing graylevel images in
06/02/2006 08:49
After loading the Digital Image Processing package (<<imageprocessing`)
The following command generates a 100 x 100 pixel graylevel image with
gray values (GV) in the range of 50 ot 180.
img =ToGrayLevel[Table[Random[Integer, {50, 180}], {100},{100}]]
The default way to show this image on screen is:
Show[Graphics[img]];
>>>>! But this shows GV = 50 as black and GV = 180 as white.
But, assuming the complete GV range I am working with is 0-255, I want to
display the image with 0 as black and 255 as white.
I know this can be done using:
Show[Graphics[Raster[RawImageData[img],{{0,0},{100,100}},{0,255}]],
AspectRatio->Automatic]
But, compared to the firste Show[...] expression, this is a rather
cumbersome way of doing this.
Is there a shorter way to display a graylevel images properly scaled
(0-255). I did not find anything in the Digital Image Processing
documentation.
Thanks for your help.
Maarten