Exporting Density Plots -- one pixel per point?

*To*: mathgroup at smc.vnet.net*Subject*: [mg64344] Exporting Density Plots -- one pixel per point?*From*: "quintessentialk" <quintessentialk at gmail.com>*Date*: Mon, 13 Feb 2006 03:15:02 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Hello, I wish to generate large bitmaps (tiffs, say) where each the greyscale color value of each pixel is determined by a given function of x and y. By large, I mean more than 9E6 pixels. I've tried using a density plot for this, and then a rasterized table, but I run into a couple of difficulties. First, if I use pixel counts which approach this order of magnitude, I get memory errors -- on a win32 machine with 2GB installed. Second, if I make do with a smaller pixel count, I have trouble exporting the plot in a truly one-pixel-per-data-point fashion. (The process is time consuming, and results are unconvincing). I think the problem is the way Mathematica internally tries do everything in a resolution independent way, which I don't want here. Ideas? Questions? (The specific application is to generate high resolution print-outs of holographic patterns which can later be imaged to photographic film. After appropriate development and bleaching, the exposed film can be used as a transmission hologram to couple gaussian laser beams into other interesting modes.) Thank you.

**Follow-Ups**:**Re: Exporting Density Plots -- one pixel per point?***From:*"Yasvir A. Tesiram" <tesiramy@omrf.ouhsc.edu>