function image_sincity($im)
{
	$image = valeurs_image_trans($im, "sincity");
	if (!$image) return("");
	
	$x_i = $image["largeur"];
	$y_i = $image["hauteur"];
	
	$im = $image["fichier"];
	$dest = $image["fichier_dest"];
	$creer = $image["creer"];
	
	if ($creer) {
		$im = $image["fonction_imagecreatefrom"]($im);

		$im_ = imagecreatetruecolor($x_i, $y_i);
		@imagealphablending($im_, false);
		@imagesavealpha($im_,true);
		$color_t = ImageColorAllocateAlpha( $im_, 255, 255, 255 , 127 );
		imagefill ($im_, 0, 0, $color_t);

		$tol = 0.05 ;
		for ($x = 0; $x < $x_i; $x++) {
			for ($y=0; $y < $y_i; $y++) {
			
				$rgb = ImageColorAt($im, $x, $y);
				$a = ($rgb >> 24) & 0xFF;
				$r = ($rgb >> 16) & 0xFF;
				$g = ($rgb >> 8) & 0xFF;
				$b = $rgb & 0xFF;
				
				if ($a < 127) {
					$hsv = image_rgb2hsv($r,$g,$b);
					$h = $hsv["h"];
					$s = $hsv["s"];
					$v = $hsv["v"];
					
					if ($h < $tol OR $h > 1-$tol) {
						if ($h < $tol) {
							$dist = ($tol-$h);
						}
						else if ($h > 1-$tol) {
							$dist = ($h - (1-$tol));
						}
						$s = $s * ($dist/$tol);
						if ($s > 1) $s = 1;
						$h = 0;
					} else {
						$s = 0;
					}
					
					$v = 2*($v - 0.6) + 0.6;
					
					if ($v > 1) $v=1;
					if ($v < 0) $v =0;
					
					$rgb = image_hsv2rgb($h,$s,$v);
					$r = $rgb["r"];
					$g = $rgb["g"];
					$b = $rgb["b"];
				}
				$color = ImageColorAllocateAlpha( $im_, $r, $g, $b , $a );
				imagesetpixel ($im_, $x, $y, $color);				}
		}		
		$image["fonction_image"]($im_, "$dest");		}

	$class = $image["class"];
	if (strlen($class) > 1) $tags=" class='$class'";
	$tags = "$tags alt='".$image["alt"]."'";
	$style = $image["style"];
	
	return "<img src='$dest'$tags />";
}