How to find the Dominant color in image?

Question

i want to find the dominant color in image, how can i do it ?

it would be great if i can get this in HEX code (exm: #eeeeee)

Answer 1

In regard to tkone answer, the $max is just a parameter showing density of the color at an image. I would change the code a bit to return the HEX color:

";
                // extract each value for r, g, b

                $r = ($rgb >> 16) & 0xFF;
                $g = ($rgb >> 8) & 0xFF;
                $b = $rgb & 0xFF;

                // get the Value from the RGB value

                $V = round(($r + $g + $b) / 3);
                //echo $V."
";
                // add the point to the histogram

                $histo[$V] += $V / $n;
                $histo_color[$V] = rgb2hex([$r,$g,$b]);

        }
}

// find the maximum in the histogram in order to display a normated graph

$max = 0;
for ($i=0; $i<255; $i++)
{
        if ($histo[$i] > $max)
        {
                $max = $histo[$i];
        }
}

echo "
";
for ($i=0; $i<255; $i++)
{
        $val += $histo[$i];

        $h = ( $histo[$i]/$max )*$maxheight;

        echo "";
}
echo "
";

$key = array_search ($max, $histo);
$col = $histo_color[$key];
?> 

Also, it is worth mentioning that this is just the most 'repeated' color at the image that cannot absolutely considered 'dominant' color.