On Sun, 2006-02-12 at 21:16 -0800, Randall R Schulz wrote:
Art,
On Sunday 12 February 2006 20:57, Art Fore wrote:
...
I did not get into the discussion on pixels, but I do understand the difference between raster and vector, etc. I can see where the line is jagged because of low resolution, completely understandable. What I don't understand in Gimp, I see the jaggies on the display, but when I print it out on a 600 dpi printer, I would expect them to be much smoother than on a 100 dpi screen. When I look at the same drawing with the rectangles added in Inkscape, I do not see the jaggies anywhere near as much on screen, that is, they are not as obvious. Guess the Pixel resolution for that must be based on the drawing and not the screen resolution in Gimp, where in Inkscape, it is based on the screen resolution, when translated to postscript for a 600 dpi printer, it becomes even less obvious. Is that right?
Inkscape is a vector graphics drawing program. GIMP is a raster image processor.
When you create a drawing in GIMP there is a specific resolution associated with it. If you generate the image for 96 or 100 DPI (screen resolution) and then print it on a medium resolution device such as a laser printer, you will notice the scaling up (from 100 to, say 300 or 600 DPI) required to render that image at the proper absolute size on paper.
When you create a drawing in Inkscape, there is no intrinsic resolution associated with the image. Only physical dimensions of the lines and curves that make it up. Thus whether rendered on a low-resolution device (a monitor), a medium-resolution device (laser printer) or a high-resolution device (phototypesetter) an optimal rendering for that device at its native resolution is produced.
PostScript (and by extension, PDF) has both vector and raster image capabilities, so a single PostScript page can include raster images and vector components.
Art
Randall Schulz
Thanks for the info. Hadn't thought of it that way before. Guess it hadn't dawned on me that postscript handles bitmaped graphics. Art