MathGroup Archive 2001

[Date Index] [Thread Index] [Author Index]

Search the Archive

2 questions about bitmap images


1) I would like to use Raster to display a bitmap in a graphic, but I would
like some of the values of the bitmap to not be displayed (100% transparent
pixels).
I have been able to achieve this by writing my own version of Raster that
draw each pixel as a rectangle, but I would like to know if there is a way
to get the regular Raster to do it. I hate to carry around my own version of
Mathematica functions.

2) I am starting to use the "Digital Image Processing" application add-on.
Has anyone figured out how to take a graphic generated by a previous Show
command and turn it into an "ImageData" structure? It seems there should be
a way to do it using the usual Display or maybe even Export?
I'd rather not have to write a file and then read it back.

Thanks,

Luc

"Things well understood are explained well!"



  • Prev by Date: Re : Simple indefinite integral disagrees with table
  • Next by Date: Re: ScatterPlot3D/Plot3D
  • Previous by thread: Re : Simple indefinite integral disagrees with table
  • Next by thread: Re: 2 questions about bitmap images