Changeset 1934 for www


Ignore:
Timestamp:
Nov 11, 2007, 1:27:51 PM (13 years ago)
Author:
Sam Hocevar
Message:
  • A few minor additions.
File:
1 edited

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  • www/study/index.html

    r1933 r1934  
    149149</p>
    150150
    151 <p> This looks promising. Let’s try immediately on Lenna! We will use the
     151<p> This looks promising. Let’s try immediately on Lenna: we will use the
    1521525-colour thresholding picture and replace the 0.25, 0.5 and 0.75 gray values
    153153with the above patterns: </p>
     
    245245and, in some cases, cause even worse artifacts. </p>
    246246
     247<!--
     248<h3> 2.4. Random dithering </h3>
     249
     250TODO
     251-->
     252
    247253<h2> 3. Error diffusion </h2>
    248254
     
    276282<p> This is a variant called <b>serpentine Floyd-Steinberg</b> that parses
    277283every odd line in reverse order (right to left). The results are very close
    278 to the original Floyd-Steinberg, but avoid artifacts in some corner cases: </p>
     284to the original Floyd-Steinberg, but the method is said to avoid artifacts in
     285some corner cases: </p>
    279286
    280287<p style="text-align: center;">
     
    311318</p>
    312319
    313 <p> <b>Stucki dithering</b> is a slight variation of Jarvis, Judice and Ninke
    314 dithering: </p>
     320<p> Finally, <b>Stucki dithering</b> is a slight variation of
     321Jarvis-Judice-Ninke dithering: </p>
    315322
    316323<p style="text-align: center;">
     
    322329       class="inline" alt="Stucki error diffusion gradient" />
    323330</p>
     331
     332<!--
     333<p> There are countless other error diffusion techniques. However it appears
     334quite clearly that the overall quality of these algorithms has reached so high
     335a point that
     336quite obvious that quality will hardly improve
     337whatever blablah
     338-->
    324339
    325340<!--
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