Re: A Bitmap file as input for Mathematica 3.0
- To: mathgroup at smc.vnet.net
- Subject: [mg21210] Re: [mg21035] A Bitmap file as input for Mathematica 3.0
- From: Jean-Marie Thomas <jmt at agat.net>
- Date: Fri, 17 Dec 1999 01:29:03 -0500 (EST)
- Organization: TeA
- References: <199912130451.XAA16101@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Suppose you have an image "myImage.bmp".
You can import it in Mathematica :
myImage=Import["myImage.bmp"]
and visualize it using
Show[myImage]
Using
FullForm[myImage]
will give you something like :
Graphics[Raster[
List[List[List[255, 255, 255], List[255, 255, 255], List[255, 255, 255],
List[255, 255, 255],
<<...>>,
Rule[ColorFunction, RGBColor]], Rule[AspectRatio, Automatic]]
which is now expressed as a Graphics object.
Since a Graphics object has no built-in size (you could resize it, manually on
the notebook, or using
Show[myImage, ImageSize->500] for instance, and note the default size for
Graphics object is set by your style sheet, default being something like 288),
the data you can import does not have a display size.
Maybe the Windows .bmp format has a display size, but Mathematica does not read
it.
On Mon, 13 Dec 1999, Adam Stachura wrote:
> Hi!
>
> I have following question. I'd like to compute the area
> of a figure drawn on a page of paper.
>
> I have scanned this page to file *.bmp.
>
> Is there any method to compute the area automaticly with Mathematica
> when
> we are given a BMP file ?
>
> Thanks in advance, Adam.
- References:
- A Bitmap file as input for Mathematica 3.0
- From: Adam Stachura <stachura@kul.lublin.pl>
- A Bitmap file as input for Mathematica 3.0