On Sun, 2006-02-12 at 18:27 -0500, Carl Hartung wrote:
On Sunday 12 February 2006 12:56, Art Fore wrote:
How do I get a line off horizontal by 5 deg to not be jagged? (tried grid setting of 1 pixel, still the same) even prints out this way on laserjet postscript printer with 1200 dpi resolution. (image is 1900X1200 resolution)
Hi Art,
Every bitmap I've ever zoomed into closely enough represents diagonal lines with sawtooths, excepting perfect 45 degree angles, of course. So, I'm pretty sure you are on the right track looking at vector solutions.
Separate questions and a comment: What's your screen resolution?... and the bit-depth? (16-bit, 24-bit or 32 bit?) My normal desktop resolution is 1600x1200 dpi at 24 bits color depth (a.k.a. "True Color".) When I display a 24-bit color photograph on my screen at 100% zoom and capture a screenshot of it, the result looks as good as the original when I crop off the excess desktop.
Back to your project: If I were you, I'd experiment with using a vector drawing program and setting the photograph, which is a bitmap, as the *background* (a.k.a. "canvas" in some programs.)
The idea is to create your diagrams using vectors on one or more transparent layers over the bitmap canvas. Vectors scale and are much less susceptible to "jaggies" assuming you've got a decent printer/driver setup. The vector programs I've tried before and liked are:
xfig (great for quick "one off" projects) dia (like xfig but oriented to "dia"grams and flow charts) Inkscape
How do I hide a layer I do not want printed? If you can do that, it sure is not obvious at all and there is noting in help that I could find.
Look for the Egyptian style "eye" with brow in the layers menu. Click on it to make the eye disappear and the visibility of the associated layer is turned off. Click it again to make it visible and the eye reappears. Of course, you'll have to have a demo file with pre-existing layers or make some layers yourself to see this.
I'd strongly recommend you install the package GIMP Help and invest the time in reading it. I know it helped me a lot! The GIMP is truly awesome, but the learning curve can be steep because it has so many features.
regards,
Carl
Screen resolution is 1920X1200 on a 24 inch LCD display. Printer is Laserjet 2300 with 600 dpi resolution and postscript. Art