function compareImages($pathA, $pathB)
{
$accuracy = 90;
//Set accuracy of comparison
$bim = imagecreatefromjpeg($pathA);
//load base image from internet
//create comparison points
$bimX = imagesx($bim);
$bimY = imagesy($bim);
$pointsX = $accuracy * 5;
$pointsY = $accuracy * 5;
$sizeX = round($bimX / $pointsX);
$sizeY = round($bimY / $pointsY);
$im = imagecreatefromjpeg($pathB);
//load second image from internet
//loop through each point and compare the color of that point
$y = 0;
$matchcount = 0;
$num = 0;
for ($i = 0; $i <= $pointsY; $i++) {
$x = 0;
for ($n = 0; $n <= $pointsX; $n++) {
$rgba = imagecolorat($bim, $x, $y);
$colorsa = imagecolorsforindex($bim, $rgba);
$rgbb = imagecolorat($im, $x, $y);
$colorsb = imagecolorsforindex($im, $rgbb);
if (colorComp($colorsa['red'], $colorsb['red']) && colorComp($colorsa['green'], $colorsb['green']) && colorComp($colorsa['blue'], $colorsb['blue'])) {
$matchcount++;
}
$x += $sizeX;
$num++;
}
$y += $sizeY;
}
$rating = $matchcount * (100 / $num);
return $rating;
}
function compareImages($url_1, $url_2, $accuracy)
{
//load base image
$imagePathA = $url_1;
$imagePathB = $url_2;
$bim = imagecreatefromjpeg($imagePathA);
$bim = imagescale($bim, 600, 600);
//create comparison points
$bimX = imagesx($bim);
$bimY = imagesy($bim);
$pointsX = $accuracy * 5;
$pointsY = $accuracy * 5;
$sizeX = round($bimX / $pointsX);
$sizeY = round($bimY / $pointsY);
//load image into an object
$im = imagecreatefromjpeg($imagePathB);
$im = imagescale($im, 600, 600);
//loop through each point and compare the color of that point
$y = 0;
$matchcount = 0;
$num = 0;
for ($i = 0; $i < $pointsY; $i++) {
$x = 0;
for ($n = 0; $n < $pointsX; $n++) {
$rgba = imagecolorat($bim, $x, $y);
$colorsa = imagecolorsforindex($bim, $rgba);
$rgbb = imagecolorat($im, $x, $y);
$colorsb = imagecolorsforindex($im, $rgbb);
if (colorComp($colorsa['red'], $colorsb['red']) && colorComp($colorsa['green'], $colorsb['green']) && colorComp($colorsa['blue'], $colorsb['blue'])) {
//point matches
$matchcount++;
}
$x += $sizeX;
$num++;
}
$y += $sizeY;
}
//take a rating of the similarity between the points, if over 90 percent they match.
$rating = $matchcount * (100 / $num);
return $rating;
}
