image data

[Mark Smith]

Wilhelm, I would think that it's not possible with JPEGs and PNGs ,  
since they are compressed formats, and running filters on them would  
be a bit like trying to run a spellcheck on a zipped text file. With  
uncompressed formats like TIFFs, you would have to parse the file  
headers to extract the actual pixel data, which is presumably going  
to be the same data as the imageData.

Best,

Mark

On 10 Apr 2007, at 22:13, Wilhelm Sanke wrote:

>
> I would very much like to try out to come up with a routine to  
> manipulate pixels on the basis of the "text of image" property (to  
> compare it with the possibilities the imagedata format offers).  
> Where could I find background information for such an approach?
>
> --Wilhelm Sanke
> <http://www.sanke.org/MetaMedia>
>
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