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diff --git a/doc/manual-html/gimpprint_28.html b/doc/manual-html/gimpprint_28.html deleted file mode 100644 index 3116157..0000000 --- a/doc/manual-html/gimpprint_28.html +++ /dev/null @@ -1,77 +0,0 @@ -<HTML> -<HEAD> -<!-- This HTML file has been created by texi2html 1.51 - from .././gimpprint.texi on 11 June 2004 --> - -<TITLE>GIMP-Print - Weaving algorithms</TITLE> -</HEAD> -<BODY> -Go to the <A HREF="gimpprint_1.html">first</A>, <A HREF="gimpprint_27.html">previous</A>, <A HREF="gimpprint_29.html">next</A>, <A HREF="gimpprint_47.html">last</A> section, <A HREF="gimpprint_toc.html">table of contents</A>. -<P><HR><P> - - -<H2><A NAME="SEC43" HREF="gimpprint_toc.html#TOC43">B.2 Weaving algorithms</A></H2> -<P> -<A NAME="IDX184"></A> - -</P> -<P> -I considered a few algorithms to perform the weave. The first one I -devised let me use only @math{(jets-distance_between_jets+1)} -nozzles, or 25. This is OK in principle, but it's slower than using all -nozzles. By playing around with it some more, I came up with an -algorithm that lets me use all of the nozzles, except near the top and -bottom of the page. - -</P> -<P> -This still produces some banding, though. Even better quality can be -achieved by using multiple nozzles on the same line. How do we do -this? In 1440x720 mode, we're printing two output lines at the same -vertical position. However, if we want four passes, we have to -effectively print each line twice. Actually doing this would increase -the density, so what we do is print half the dots on each pass. This -produces near-perfect output, and it's far faster than using (pseudo) -"MicroWeave". - -</P> -<P> -Yet another complication is how to get near the top and bottom of the -page. This algorithm lets us print to within one head width of the -top of the page, and a bit more than one head width from the bottom. -That leaves a lot of blank space. Doing the weave properly outside of -this region is increasingly difficult as we get closer to the edge of -the paper; in the interior region, any nozzle can print any line, but -near the top and bottom edges, only some nozzles can print. We -originally handled this by using the naive way mentioned above near -the borders, and switching over to the high quality method in the -interior. Unfortunately, this meant that the quality is quite visibly -degraded near the top and bottom of the page. We have since devised -better algorithms that allow printing to the extreme top and bottom of -the region that can physically be printed, with only minimal loss of -quality. - -</P> -<P> -Epson does not advertise that the printers can print at the very top -of the page, although in practice most of them can. The quality is -degraded to some degree, and we have observed that in some cases not -all of the dots get printed. Epson may have decided that the -degradation in quality is sufficient that printing in that region -should not be allowed. That is a valid decision, although we have -taken another approach. - -</P> - -<UL> -<LI><A HREF="gimpprint_29.html#SEC44">Simple weaving algorithms</A>: Starting to weave. -<LI><A HREF="gimpprint_30.html#SEC45">Perfect weaving</A>: Improving the weave. -<LI><A HREF="gimpprint_31.html#SEC46">Weaving collisions</A>: Bang! -<LI><A HREF="gimpprint_32.html#SEC47">What is perfect weaving?</A>: What makes a "perfect" weave? -<LI><A HREF="gimpprint_33.html#SEC48">Oversampling</A>: Increasing resolution, reducing banding -</UL> - -<P><HR><P> -Go to the <A HREF="gimpprint_1.html">first</A>, <A HREF="gimpprint_27.html">previous</A>, <A HREF="gimpprint_29.html">next</A>, <A HREF="gimpprint_47.html">last</A> section, <A HREF="gimpprint_toc.html">table of contents</A>. -</BODY> -</HTML> |