[plt-scheme] help

From: Robby Findler (robby at cs.uchicago.edu)
Date: Wed Mar 22 15:36:13 EST 2006


  (define the-bitmap (make-object bitmap% <<filename>>))

to create a bitmap and then use a bitmap-dc to poke around with the bitmap:

  (define the-bdc (make-object bitmap-dc% the-bitmap))
  (send the-bdc get-pixel ...)

Search in Help Desk for "bitmap-dc%" to see how the get-pixel method


At Tue, 21 Mar 2006 10:02:41 -0800 (PST), Amit Gupta wrote:
> hi
>  can somebody please tell if there exists a way to read an image file (format may be .bmp 
> .jpg etc)  and create its pixel map( a map which contains 0 if that pixxel is white else 1).
>  Thanks
>  Amit Gupta
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