Reducing image data size

[Björnke von Gierke]

The simplest way to do this is with imageData. Something like the  
following should do the trick (untested):

on mouseUp
   put 100,100,180,180 into theRect --or whatever
   set the rectangle of image 1 to theRect --original image
   set the rectangle of image 2 to theRect --thumbnail image
   set the imagedata of image 2 to the imagedata of image 1
   set the height of image 1 to the formattedHeight of image 1
   set the width of image 1 to the formattedWidth of image 1
end mouseUp

Note that the two images need to have the exact same rectangle, or the  
second image will show distorted garbage, or nothing at all.

have fun
Bjoernke

PS: I used this in Malta during my presentation, but also transfered  
the imagedata over a socket. So you could theoretically  even save the  
imagedata to a file, for later retrieval.

On 18 Feb 2008, at 11:55, FlexibleLearning at aol.com wrote:

> If import a big image and reduce its dimensions to a thumbnail, how  
> do I
> reduce the data size of the thumbnail?
>
> If this has already been written up somewhere, could someone point  
> it out  to
> me? The imageData dox entry describes what it is but not really how  
> to use
> it.
>
> (Hugh has shinpads on, ready for kicking self)


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