PHP - Image Save As With A Lower Quality

Hello. I was wondering if there is any way to remove the white pixels from around a transparent png image?

When I use imageimagecopymerge to place a transparent PNG on top of another image with a dark background, the top image has a few white pixels around the border.

Is there any way to remove these white pixels?

I attached an example of the image with the white pixels.


Thanks

This resizer works fine except I would like it to save the original image AND the thumbnail.  Right now its only saving the cropped thumbnail.  It's seems simple enough but I've tried several different ways but can't get it to work. :(

I would appreciate your help. :)

  define( 'DESIRED_IMAGE_WIDTH', 150 );
  define( 'DESIRED_IMAGE_HEIGHT', 150 );

  $source_path = $_FILES[ 'thumb' ][ 'tmp_name' ];
  $timestamp = time();
 
 $target = "image_files/".$imagename;
move_uploaded_file($source, $target);


  //
  // Add file validation code here
  //

  list( $source_width, $source_height, $source_type ) = getimagesize( $source_path );

  switch ( $source_type )
  {
    case IMAGETYPE_GIF:
      $source_gdim = imagecreatefromgif( $source_path );
      break;

    case IMAGETYPE_JPEG:
      $source_gdim = imagecreatefromjpeg( $source_path );
      break;

    case IMAGETYPE_PNG:
      $source_gdim = imagecreatefrompng( $source_path );
      break;
  }

  $source_aspect_ratio = $source_width / $source_height;
  $desired_aspect_ratio = DESIRED_IMAGE_WIDTH / DESIRED_IMAGE_HEIGHT;

  if ( $source_aspect_ratio > $desired_aspect_ratio )
  {
    //
    // Triggered when source image is wider
    //
    $temp_height = DESIRED_IMAGE_HEIGHT;
    $temp_width = ( int ) ( DESIRED_IMAGE_HEIGHT * $source_aspect_ratio );
  }
  else
  {
    //
    // Triggered otherwise (i.e. source image is similar or taller)
    //
    $temp_width = DESIRED_IMAGE_WIDTH;
    $temp_height = ( int ) ( DESIRED_IMAGE_WIDTH / $source_aspect_ratio );
  }

  //
  // Resize the image into a temporary GD image
  //

  $temp_gdim = imagecreatetruecolor( $temp_width, $temp_height );
  imagecopyresampled(
    $temp_gdim,
    $source_gdim,
    0, 0,
    0, 0,
    $temp_width, $temp_height,
    $source_width, $source_height
  );

  //
  // Copy cropped region from temporary image into the desired GD image
  //

  $x0 = ( $temp_width - DESIRED_IMAGE_WIDTH ) / 2;
  $y0 = ( $temp_height - DESIRED_IMAGE_HEIGHT ) / 2;

  $desired_gdim = imagecreatetruecolor( DESIRED_IMAGE_WIDTH, DESIRED_IMAGE_HEIGHT );
  imagecopy(
    $desired_gdim,
    $temp_gdim,
    0, 0,
    $x0, $y0,
    DESIRED_IMAGE_WIDTH, DESIRED_IMAGE_HEIGHT
  );

  //
  // Render the image
  // Alternatively, you can save the image in file-system or database
  //

  header( 'Content-type: image/jpeg' );
  imagejpeg( $desired_gdim, "image_files/" . $timestamp . $_FILES["thumb"]["name"] );
  

hi all,

i'm trying to save an image after cropping it using jcrop (jquery plugin).
i'm currently using a script i found on the internet called ImageManipulation.php (attached).
its working fine, but i get a black image if i crop a gif, or png images (works great for jpg images).

Code: [Select]
$objImage = new ImageManipulation("../products/" . $_SESSION['image']);
if ($objImage->imageok) {
    // get x, y, w, h from hidden inputs that are update by jcrop
    $objImage->setCrop($_POST['x'], $_POST['y'], $_POST['w'], $_POST['h']);
    $objImage->resize(150);
    $objImage->save("../products/" . $_SESSION['image']);
}
how can i fix this?? if you have a better way of using php with jcrop to save cropped images please share it
thanks for the help

Hi

I have a javascript image cropping script which is working well, I then have some php to save the new cropped image.

But I can't seem to get it working 100%.

When the form is posted the cropped image is not created and I get a "The connection was reset" error.

If I comment out the line Code: [Select]
$source=imagecreatefromjpeg($image); then I dont get the The connection was reset" error but the image is obviously still not created.

Can anyone help?

Code: [Select]
<?php
function resizeThumbnailImage($thumb_image_name, $image, $width, $height, $start_width, $start_height, $scale){
list($imagewidth, $imageheight, $imageType) = getimagesize($image);

$imageType = 'image/jpeg';

$newImageWidth = ceil($width * $scale);
$newImageHeight = ceil($height * $scale);
$newImage = imagecreatetruecolor($newImageWidth,$newImageHeight);
switch($imageType) {
case "image/jpeg":
case "image/jpg":
$source=imagecreatefromjpeg($image); 
break;
}
imagecopyresampled($newImage,$source,0,0,$start_width,$start_height,$newImageWidth,$newImageHeight,$width,$height);
switch($imageType) {
case "image/jpeg":
case "image/jpg":
imagejpeg($newImage,$thumb_image_name,90); 
break;
}
chmod($thumb_image_name, 0777);
return $thumb_image_name;
}
function getHeight($image) {
$size = getimagesize($image);
$height = $size[1];
return $height;
}
function getWidth($image) {
$size = getimagesize($image);
$width = $size[0];
return $width;
}

$large_image_location = $upload_path.$large_image_name.'.jpg';
$thumb_image_location = $upload_path.$thumb_image_name.'.jpg';

if (isset($_POST["upload_thumbnail"])) {
$x1 = $_POST["x1"];
$y1 = $_POST["y1"];
$x2 = $_POST["x2"];
$y2 = $_POST["y2"];
$w = $_POST["w"];
$h = $_POST["h"];
$scale = $thumb_width/$w;
$cropped = resizeThumbnailImage($thumb_image_location, $large_image_location,$w,$h,$x1,$y1,$scale);

header("location:index.php");
exit();
}
?>

I'm trying to save images from a directory into mine. To get the image I am having to take the email from a database, split it and take whatever it is before the '@' sign and add it to "-S.jpg". I wrote the script and when I echo the variable it shows the correct thing, but when it tries to save it , it is trying to find the image as "script>-S.jpg". It looks like it is taking whatever is after the last '/' which in the variable since I am running javascript it is going to be </script> if you look at my variable $url. Here is the code below. Any help is appreciated.


while($rows=mysql_fetch_array($result)){
$email=$rows['email'];

 
$url= "<SCRIPT LANGUAGE=\"javascript\">
var url;
var email = \"$email\";
function emailsplit () 
{ 
var userid = email.split(\"@\"); 
var url = userid[0]; 
var imgid = \"http://my.snu.edu/images/idpictures/\" + url + \"-S.jpg\"; 
return url;
}  
document.write(emailsplit());
</script>
";

         $img[]= 'http://my.snu.edu/images/idpictures/'.$url.'-S.jpg';
  
   

}

  
       
    
      function save_image($img,$fullpath='basename'){
 
          if($fullpath=='basename'){
 
              $fullpath = basename($img);
  
          }
          $ch = curl_init ($img);
          curl_setopt($ch, CURLOPT_HEADER, 0);
          curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
          curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
          $rawdata=curl_exec($ch);
          curl_close ($ch);
          if(file_exists($fullpath)){
              unlink($fullpath);
          }
          $fp = fopen($fullpath,'x');
          fwrite($fp, $rawdata);
          fclose($fp);
      }

  
      foreach($img as $i){
   
          save_image($i); 
   
          if(getimagesize(basename($i))){
   
              echo '<h3 style="color: green;">Image ' . basename($i) . ' Downloaded OK</h3>';
  
          }else{
  
              echo '<h3 style="color: red;">Image ' . basename($i) . ' Download Failed</h3>';
  
          }
 
      }