Lines Matching full:sigmoidal
59 sigmoidal-contrast">‑sigmoidal‑contrast</a> ? <a href="command-line-options.html#silent">‑silent</a> ? <a href="command-line-options.html#similarity-threshold">‑similarity‑threshold</a> ? <a href="command-line-options.html#size">‑size</a> ? <a href="command-line-options.html#sketch">‑sketch</a> ? <a href="command-line-options.html#smush">‑smush</a> ? <a href="command-line-options.html#snaps">‑snaps</a> ? <a href="command-line-options.html#solarize">‑solarize</a> ? <a href="command-line-options.html#sparse-color">‑sparse‑color</a> ? <a href="command-line-options.html#splice">‑splice</a> ? <a href="command-line-options.html#spread">‑spread</a> ? <a href="command-line-options.html#statistic">‑statistic</a> ? <a href="command-line-options.html#stegano">‑stegano</a> ? <a href="command-line-options.html#stereo">‑stereo</a> ? <a href="command-line-options.html#storage-type">‑storage‑type</a> ? <a href="command-line-options.html#stretch">‑stretch</a> ? <a href="command-line-options.html#strip">‑strip</a> ? <a href="command-line-options.html#stroke">‑stroke</a> ? <a href="command-line-options.html#strokewidth">‑strokewidth</a> ? <a href="command-line-options.html#style">‑style</a> ? <a href="command-line-options.html#subimage-search">‑subimage‑search</a> ? <a href="command-line-options.html#swap">‑swap</a> ? <a href="command-line-options.html#swirl">‑swirl</a> ? <a href="command-line-options.html#synchronize">‑synchronize</a> ? <a href="command-line-options.html#taint">‑taint</a> ? <a href="command-line-options.html#text-font">‑text‑font</a> ? <a href="command-line-options.html#texture">‑texture</a> ? <a href="command-line-options.html#threshold">‑threshold</a> ? <a href="command-line-options.html#thumbnail">‑thumbnail</a> ? <a href="command-line-options.html#tile">‑tile</a> ? <a href="command-line-options.html#tile-offset">‑tile‑offset</a> ? <a href="command-line-options.html#tint">‑tint</a> ? <a href="command-line-options.html#title">‑title</a> ? <a href="command-line-options.html#transform">‑transform</a> ? <a href="command-line-options.html#transparent">‑transparent</a> ? <a href="command-line-options.html#transparent-color">‑transparent‑color</a> ? <a href="command-line-options.html#transpose">‑transpose</a> ? <a href="command-line-options.html#transverse">‑transverse</a> ? <a href="command-line-options.html#treedepth">‑treedepth</a> ? <a href="command-line-options.html#trim">‑trim</a> ? <a href="command-line-options.html#type">‑type</a> ? <a href="command-line-options.html#undercolor">‑undercolor</a> ? <a href="command-line-options.html#unique-colors">‑unique‑colors</a> ? <a href="command-line-options.html#units">‑units</a> ? <a href="command-line-options.html#unsharp">‑unsharp</a> ? <a href="command-line-options.html#update">‑update</a> ? <a href="command-line-options.html#verbose">‑verbose</a> ? <a href="command-line-options.html#version">‑version</a> ? <a href="command-line-options.html#view">‑view</a> ? <a href="command-line-options.html#vignette">‑vignette</a> ? <a href="command-line-options.html#virtual-pixel">‑virtual‑pixel</a> ? <a href="command-line-options.html#visual">‑visual</a> ? <a href="command-line-options.html#watermark">‑watermark</a> ? <a href="command-line-options.html#wave">‑wave</a> ? <a href="command-line-options.html#wavelet-denoise">‑wavelet‑denoise</a> ? <a href="command-line-options.html#weight">‑weight</a> ? <a href="command-line-options.html#white-point">‑white‑point</a> ? <a href="command-line-options.html#white-threshold">‑white‑threshold</a> ? <a href="command-line-options.html#window">‑window</a> ? <a href="command-line-options.html#window-group">‑window‑group</a> ? <a href="command-line-options.html#write">‑write</a> </p>
7004 <h3 class="magick-header"><a id="sigmoidal-contrast"></a>-sigmoidal-contrast <var>contrast</var>x<var>mid-point</var></h3>
7009 <p>Increase the contrast of the image using a sigmoidal transfer function
7019 <p>By default the image contrast is increased, use <var>+sigmoidal-contrast</var> to decrease the contrast.</p>
7021 <p>To achieve the equivalent of a sigmoidal brightness change (similar to
7022 a gamma adjustment), you would use <var>-sigmoidal-contrast
7023 {brightness}x0%</var> to increase brightness and <var>+sigmoidal-contrast {brightness}x0%</var> to decrease brightness.
7024 Note the use of '0' fo rthe mid-point of the sigmoidal curve. </p>
