картинки темнеют :'(

<?php
function module_image_resize($s_img)
{
	// if not defined functions
	if (!function_exists('imagecreatefromjpeg'))
		return false;
	if (!function_exists('imagecopyresized'))
		return false;

	// loading image
	$s_im = imagecreatefromjpeg($s_img);
	if ($s_im)
	{
		// get_x_y
		$image_s_x = imagesx($s_im);
		$image_s_y = imagesy($s_im);

		if ($image_s_x > 320)
			$image_d_x = 320;
		else
			$image_d_x = $image_s_x;

		if ($image_s_y > 480)
			$image_d_y = 480;
		else
			$image_d_y = $image_s_y;

		$d_im = imagecreate($image_d_x, $image_d_y);

		// if loaded
		if ($d_im)
		{
			imagecopyresampled($d_im, $s_im, 0, 0, 0, 0, $image_d_x, $image_d_y, $image_s_x, $image_s_y);
			imagejpeg($d_im, $s_img, 100);
			imagedestroy($d_im);
			return true;
		}
		else
		{
			return false;
		}
	}
}
?>