protected function computeBucket(Color $_color)
{
if ($this->useGreyscale) {
return ["grey" => (int) ($_color->getGrey() / $this->bucketQuantity)];
}
return ["red" => (int) ($_color->getRed() / $this->bucketQuantity), "green" => (int) ($_color->getGreen() / $this->bucketQuantity), "blue" => (int) ($_color->getBlue() / $this->bucketQuantity)];
}
protected function compareColorPixels(Color $_a, Color $_b)
{
return (pow($_a->getRed() - $_b->getRed(), 2) + pow($_a->getGreen() - $_b->getGreen(), 2) + pow($_a->getBlue() - $_b->getBlue(), 2) + pow($_a->getAlpha() - $_b->getAlpha(), 2)) / 4;
}
protected function compareColorPixels(Color $_a, Color $_b)
{
// jesli napotkalismy na rozne pixele - konczymy porownywanie obrazow
$this->wasCompared = $_a->getRed() !== $_b->getRed() || $_a->getGreen() !== $_b->getGreen() || $_a->getBlue() !== $_b->getBlue() || $_a->getAlpha() !== $_b->getAlpha();
}
protected function compareColorPixels(Color $_a, Color $_b)
{
return ((int) ($_a->getRed() !== $_b->getRed()) + (int) ($_a->getGreen() !== $_b->getGreen()) + (int) ($_a->getBlue() !== $_b->getBlue()) + (int) ($_a->getAlpha() !== $_b->getAlpha())) / 4;
}