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Re: [ferret_users] spurious ripples in ps shade plot

Hi Matthew,

The PostScript itself may be ok -- it may be your PostScript viewer (gv?) that is antialiasing the image, and getting confused by the edges of the many little colored rectangles that make up the shaded area of the plot. See if you can turn the antialiasing off -- in gv, you can do this through the menus or by pressing the "a" key.

You can also convert the PostScript to pdf, png, gif, or other image formats at the command line, using the "convert" utility which is part of the ImageMagick suite. Make sure to turn off antialiasing there too (use "convert +antialias ..." to prevent antialiasing).


On Fri, 8 Feb 2008, Matthew Hecht wrote:

I've been attempting to produce a shade plot which will satisfy a journal's graphics specialist. The plot looks great on-screen, but when I use Fprint to convert to postscript it acquires spurious lines, and spurious ripples in regions that should be of uniform color, as in the attached panel. I've seen an email exchange from Nov 2005 suggesting use of gif output, with as much resolution as you can get, as a work-around. I've done this, panel-by-panel, then pasting the gif panels together to maintain resolution. Has anyone found a better solution to producing publication-quality output of shade plots?

thanks for any suggestions! --Matthew

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