如何上傳/調整使用數碼相機拍攝的圖像？

Question

我正在建設一個畫廊，目標是低入口門檻。我的用戶是使用數碼相機拍照的人，因此文件大小在每張圖像200至400 KB之間。

我使用GD庫時遇到的問題是，當調整大小和上傳時，每個圖像使用大約90MB內存+服務器有64 MB限制時。

當我使用ImageMagick時超時並引發內部服務器錯誤。

我想知道如果有人有任何上傳/調整大小的圖像大小的經驗，並可以給我一些指針。

感謝，
列維

編輯：這裏是我的代碼上傳

 /** Begin Multiple Image Upload**/  
     $numberImages = count($_FILES['galFile']['name'])-1; 

for($i=1;$i<=$numberImages;$i++) 
{ 
$imageName = $_FILES['galFile']['name'][$i]; 
      $imageType = $_FILES['galFile']['type'][$i]; 
      $imageSize = $_FILES['galFile']['size'][$i]; 
      $imageTemp = $_FILES['galFile']['tmp_name'][$i]; 
      $imageError = $_FILES['galFile']['error'][$i]; 

      //Make sure it is an image 
      if(in_array(end(explode(".", $imageName)), $allowed)) 
      { 
       //Where to upload image to 
       $uploadFile = $uploadDir . $imageName; 
       if (file_exists($uploadFile)) 
     { 
      //What to do if file already exists 
      //Append random number to the end 
      $front = explode(".", $imageName); 
      $randomNum = rand(1,100); 
      $front[0] = $front[0].$randomNum; 
      $imageName = $front[0].".".$front[1]; 
      $uploadFile = $uploadDir . $imageName; 
     } 
        if(move_uploaded_file($imageTemp,$uploadFile)) 
        { 
        //Add $imageName to DB 
        $query = "INSERT INTO galleryImages VALUES(\"0\",\"$lastInsert\",\"$imageName\",\"$i\")"; 
       mysql_query($query); 
       reSizePic($uploadFile); 
        } 
      } 
} 

這是我一直在使用，以調整GD代碼：

function reSizePic($image) 
{ 
$source_pic = $image; 
$destination_pic = $image; 
$max_width = 660; 
$max_height = 500; 

$src = imagecreatefromjpeg($source_pic); 
list($width,$height)=getimagesize($source_pic); 

$x_ratio = $max_width/$width; 
$y_ratio = $max_height/$height; 

if(($width <= $max_width) && ($height <= $max_height)) 
{ 
    $tn_width = $width; 
    $tn_height = $height; 
} 
elseif (($x_ratio * $height) < $max_height) 
{ 
    $tn_height = ceil($x_ratio * $height); 
    $tn_width = $max_width; 
} 
else 
{ 
    $tn_width = ceil($y_ratio * $width); 
    $tn_height = $max_height; 
} 

$tmp = imagecreatetruecolor($tn_width,$tn_height); 

imagecopyresampled($tmp,$src,0,0,0,0,$tn_width, $tn_height,$width,$height); 

imagejpeg($tmp,$destination_pic,100); 
imagedestroy($src); 
imagedestroy($tmp); 
} 

這是我用來調整大小的ImageMagick代碼：

$resource = NewMagickWand(); 
MagickReadImage($resource,$image); 
MagickSetImageCompressionQuality($resource, 100); 
$resource = MagickTransformImage($resource,'0x0','660x500'); 
MagickWriteImage($resource, $image); 
DestroyMagickWand($resource); 

Answer 1

http://pl.php.net/imagecreatefromjpeg

The memory required to load an image using imagecreatefromjpeg() is a function of the image's dimensions and the images's bit depth, multipled by an overhead. It can calculated from this formula: Num bytes = Width * Height * Bytes per pixel * Overhead fudge factor Where Bytes per pixel = Bit depth/8, or Bits per channel * Num channels/8.

這是對GD的一部分。現在ImageMagick的：你嘗試過一個簡單的方法：

$thumb = new Imagick('image.jpg'); 
$thumb->resizeImage($w,$h,Imagick::FILTER_LANCZOS,1); 
$thumb->writeImage('thumb.jpg'); 
$thumb->destroy(); 

Answer 2

我不知道這個問題的任何東西，但下面的答案有用

What is the best way to handle photo uploads?

以防萬一它是不，忽略它。

Answer 3

請將以下代碼放在您的php文件的頂部。

ini_set（「memory_limit」，「500M」）;