Legacy ImageMagick Discussions Archive

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convert -HSLRangeMin(197, 21, 29) -HSLRangeMax(222, 40, 33) ...  // checking one set of colors
or just
convert -HSLRange(197, 21, 29, 222, 40, 33) ... // checking one set of colors
or using multiple options:
convert -HSLRange(197, 21, 29, 222, 40, 33),(104, 8, 31, 216, 33, 46) ... // checking multiple sets of colors
or yet improved with fuzz:
convert -fuzz 4 -HSLRange(197, 21, 29, 222, 40, 33),(104, 8, 31, 216, 33, 46) ... // checking multiple sets of colors. You could have as many sets of colors as you want, but usually 1-3 could be enough

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HSL_min1 = { H:197, S:21, L:29}; // meaning: ( color is in range of H>=197 && S>=21 && L >=29
HSL_max1 = { H:222, S:40, L:33}; // and H<=222 && S<=40 && L <=33 ) // dark shadows
// or
HSL_min2 = { H:104, S:8, L:31}; // ( color is in range of H>=104 && S>=8 && L >=31
HSL_max2 = { H:216, S:33, L:46}; // and H<=216 && S<=33 && L <=46 ) // light shadows
// and so on ... 

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$lessSingle = new less_exceptions('single',53,'s'); // I created exception for colors which means that colors which have saturation <=53 should be excluded from result...

$Interval_teeth = new interval_exceptions( 'three', array('ll'=>array(array(12,12,79)),'ul'=>array(array(13,17,83))) ); // ll - lower limit, ul - upper limit
$exceptionsToken = array($Interval_teeth,$lessSingle); // exceptionsToken keeps my exceptions (these colors wont be included in result - wont be effected

// The following are based on RGB but the core works with HSL/HSV model
// Also the exceptions are defined in HSL model. Just for html I use RGB model in HEX
$myColorsForAvarage = array( 'cc825f', 'f21a1a','9b5042', '933f31', 'ff9393', 'd09e9e');
$nextColorsForReplace = array('d0d0d0', '7a7a7a'); // this will be added to $myColorsForAvarage 
// Finally I use this to replace the colors: I pass all color limits and color exceptions
color_math::replaceColors($file,$myColorsForAvarage,$nextColorsForReplace,$exceptionsToken, $replaceColor, true);	
// So this is yet advanced example

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fact=`convert xc: -format "%[fx:360/255]" info:`
convert -size 360x1 xc: -colorspace HSL -fx "(r>Xr && r<Yr)?white:black" redlut.png
convert -size 360x1 xc: -colorspace HSL -fx "(g>Xg*$fact && g<Yg*$fact)?white:black" greenlut.png
convert -size 360x1 xc: -colorspace HSL -fx "(b>Xb*$fact && b<Yb*$fact)?white:black" bluelut.png

convert redlut.png greenlut.png bluelut.png -combine lut.png

convert \( image -colorspace HSL \) lut.png -clut mask.png

convert image -mask mask.png <processing> result

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  if ((image->colorspace == HCLColorspace) ||
      (image->colorspace == HSBColorspace) ||
      (image->colorspace == HSLColorspace) ||
      (image->colorspace == HWBColorspace))
    {
      /* This calculates a arc distance for hue.  Really it should be a vector
         angle of 'S'/'W' length with 'L'/'B' forming appropriate cones.  In
         other words this is a hack - Anthony
      */
      if (fabs((double) pixel) > (QuantumRange/2))
        pixel-=QuantumRange;
      pixel*=2;
    }

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convert 20r45mo.jpg -colorspace HSL -fuzz 20% -fill Black -opaque #999933332222 -colorspace sRGB r.png