function calculate_avg_color($iconFile)
{
$palette = colorPalette($iconFile, 4, 4);
if (is_array($palette)) {
foreach ($palette as $p) {
$hsl = rgb2hsl(_color_unpack("#{$p}"));
if ($hsl[1] > 0.25 && $hsl[2] > 0.25 && !($hsl[0] >= 0 && $hsl[0] < 0.01 && $hsl[1] < 0.01) && !($hsl[0] >= 0 && $hsl[0] < 0.01 && $hsl[2] > 0.99)) {
return _color_pack(hsl2rgb($hsl));
}
}
}
return '';
}
<?php
function colorPalette($imageFile)
{
$size = @getimagesize($imageFile);
if ($size === false) {
user_error("Unable to get image size data");
return false;
}
$img = @imagecreatefromstring(file_get_contents($imageFile));
if (!$img) {
user_error("Unable to open image file");
return false;
}
$thisColor = imagecolorat($img, 5, 5);
$rgb = imagecolorsforindex($img, $thisColor);
$red = round(round($rgb['red'] / 0x33) * 0x33);
$green = round(round($rgb['green'] / 0x33) * 0x33);
$blue = round(round($rgb['blue'] / 0x33) * 0x33);
$thisRGB = sprintf('%02X%02X%02X', $red, $green, $blue);
return $thisRGB;
}
if ($_POST) {
$url = $_POST['url'];
$color = colorPalette($url, 10, 4);
echo $color;
}
}
if (!$img) {
user_error("Unable to open image file");
return false;
}
for ($x = 0; $x < $size[0]; $x += $granularity) {
for ($y = 0; $y < $size[1]; $y += $granularity) {
$thisColor = imagecolorat($img, $x, $y);
$rgb = imagecolorsforindex($img, $thisColor);
$red = round(round($rgb['red'] / 0x33) * 0x33);
$green = round(round($rgb['green'] / 0x33) * 0x33);
$blue = round(round($rgb['blue'] / 0x33) * 0x33);
$thisRGB = sprintf('%02X%02X%02X', $red, $green, $blue);
if (array_key_exists($thisRGB, $colors)) {
$colors[$thisRGB]++;
} else {
$colors[$thisRGB] = 1;
}
}
}
arsort($colors);
return array_slice(array_keys($colors), 0, $numColors);
}
$pic = "med.jpg";
$palette = colorPalette($pic, 8, 10);
sort($palette, SORT_NUMERIC);
echo "<img src=\"" . $pic . "\" />";
foreach ($palette as $color) {
$css = "display: inline-block; height: 100px; width: 100px; background: #" . $color . ";";
echo "<span style=\"{$css}\"></span>";
}
