我想使用php剪裁.tif格式圖像

Question

我想使用php剪裁.tif格式圖像。 我已經做過，如果圖像是以.jpg，gif或png的格式，但我想裁剪一個.tif圖像的某些尺寸，即從200x200正確的完整圖像的1024x1024 .please考慮它是.tif格式。

http://rkwebsolutions.in.md-16.webhostbox.net/check/8713855051.tif

我使用這個功能支持JPEG/PNG/GIF格式的圖片，但是無法裁剪的.tif圖像

function cropImage($source_image, $target_image, $crop_area) 
{ 
    // detect source image type from extension 
    $source_file_name = basename($source_image); 
    $source_image_type = substr($source_file_name, -3, 3); 

    // create an image resource from the source image 
    switch(strtolower($source_image_type)) 
    { 
     case 'jpg': 
      $original_image = imagecreatefromjpeg($source_image); 
      break; 

     case 'gif': 
      $original_image = imagecreatefromgif($source_image); 
      break; 

     case 'png': 
      $original_image = imagecreatefrompng($source_image); 
      break;  

     default: 
      trigger_error('cropImage(): Invalid source image type', E_USER_ERROR); 
      return false; 
    } 

    // create a blank image having the same width and height as the crop area 
    // this will be our cropped image 
    $cropped_image = imagecreatetruecolor($crop_area['width'], $crop_area['height']); 

    // copy the crop area from the source image to the blank image created above 
    imagecopy($cropped_image, $original_image, 0, 0, $crop_area['left'], $crop_area['top'], 
       $crop_area['width'], $crop_area['height']); 

    // detect target image type from extension 
    $target_file_name = basename($target_image); 
    $target_image_type = substr($target_file_name, -3, 3); 

    // save the cropped image to disk 
    switch(strtolower($target_image_type)) 
    { 
     case 'jpg': 
      imagejpeg($cropped_image, $target_image, 100); 
      break; 

     case 'gif': 
      imagegif($cropped_image, $target_image); 
      break; 

     case 'png': 
      imagepng($cropped_image, $target_image, 0); 
      break;  

     default: 
      trigger_error('cropImage(): Invalid target image type', E_USER_ERROR); 
      imagedestroy($cropped_image); 
      imagedestroy($original_image); 
      return false; 
    } 

    // free resources 
    imagedestroy($cropped_image); 
    imagedestroy($original_image); 

    return true; 
} 


// using the function to crop an image 
$source_image = 'image.jpg'; 
$target_image = 'cropped_image.jpg'; 
$crop_area = array('top' => 100, 'left' => 100, 'height' => 300, 'width' => 300); 

cropImage($source_image, $target_image, $crop_area); 

任何人都可以幫助 在此先感謝。

Answer 1

您可以先將圖像轉換爲jpg格式，而不是調整大小。示例代碼如果您的服務器上安裝了imagemagic：

exec("convert /path/to/file.tiff /path/to/file.jpg", $err);