"Fossies" - the Fresh Open Source Software Archive 
"Fossies" - the Fresh Open Source Software Archive 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 2 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3 <html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta content="HTML Tidy for Linux/x86 (vers 1st March 2003), see www.w3.org" 6 name="generator" /> 7 <title>Colormap Image</title> 8 <link rel="StyleSheet" href="style/magick.css" type="text/css" /> 9 </head> 10 <body bgcolor="#FFFFFF" text="#000000" link="#0085C0" 11 vlink="#800080" alink="#0085C0"> 12 <center><img src="images/magick.png" align="bottom" width="114" 13 height="113" /></center> 14 <hr /> 15 <p>First define the preferred number of colors in your image. The 16 actual number of colors in the image may be less than your request, 17 but never more. Note, this is a color reduction option. Images with 18 less unique colors than specified with this option will have any 19 duplicate or unused colors removed. Refer to 20 <a href="https://imagemagick.org/script/quantize.php">quantize</a> 21 for more details.</p> 22 <p>You also have a choice of several options that affect your image 23 colormap. Choose from these options:</p> 24 <dl> 25 <dd> 26 <dl> 27 <dt><b>dither</b></dt> 28 <dd>apply Floyd/Steinberg error diffusion to the image. The basic 29 strategy of dithering is to trade intensity resolution for spatial 30 resolution by averaging the intensities of several neighboring 31 pixels. Images which suffer from severe contouring when reducing 32 colors can be improved with this option.</dd><br /> 33 <dt><b>black & white</b></dt> 34 <dd>transform the image to black and white.</dd><br /> 35 <dt><b>global colormap</b></dt> 36 <dd>create a single colormap for a sequence of images.</dd><br /> 37 <dt><b>netscape color cube</b></dt> 38 <dd>map image to web safe colors.</dd><br /> 39 <dt><b>map to clipboard</b></dt> 40 <dd>map image to clipboard colors.</dd><br /> 41 <dt><b>gray image</b></dt> 42 <dd>transform the image to gray colors.</dd><br /> 43 <dt><b>ordered dither</b></dt> 44 <dd>ordered dither. The parameter should be one of 45 <pre> 46 threshold Threshold Non-Dither 47 checks Checkerboard Dither 48 o2x2 Ordered 2x2 Diffused Pixel 49 o3x3 Ordered 4x4 Diffused Pixel 50 o4x4 Ordered 4x4 Diffused Pixel 51 o8x8 Ordered 8x8 Diffused Pixel 52 h4x4a Halftone 4x4 (angled) 53 h6x6a Halftone 6x6 (angled) 54 h8x8a Halftone 8x8 (angled) 55 h4x4o Halftone 4x4 (othogonal) 56 h6x6o Halftone 6x6 (othogonal) 57 h8x8o Halftone 8x8 (othogonal) 58 h16x16o Halftone 16x16 (othogonal) 59 hlines6x4 Horizontal Lines 6x4 60 </pre></dd><br /> 61 <dt><b>segment</b></dt> 62 <dd>segment an image by analyzing the histograms of the color 63 components and identifying units that are homogeneous with the 64 fuzzy c-means technique.</dd><br /> 65 <dt><b>preserve transparent pixels</b></dt> 66 <dd>by default color reduction does not preserve and transparent 67 pixels in your image. Choose this option to reduce the number of 68 colors in your image <em>while</em> preserving any transparent 69 pixels.</dd><br /></dl></dd><br /></dl> 70 <hr /> 71 <p> 72 <a href="scripts/MagickStudio.cgi/?Action=mogrify&ToolType=Comment&SessionID=null&Path=null" 73 target="Comment"><img alt="[comment]" src="images/mail.png" 74 border="0" /></a></p> 75 </body> 76 </html>