Imagick::getImageInterlaceScheme()

(PECL imagick 2.0.0)

Gets the image interlace scheme

说明

Imagick::getImageInterlaceScheme(void): int

Gets the image interlace scheme.

返回值

Returns the interlace scheme as an integer on success.错误时抛出ImagickException。

Image Interlacing is simply combining two images by layering one over the other with a certain opacity (usually 50%). The intention is to use the image in video, so that two images are displayed within one single frame, thereby doubling the frames-per-second without doubling the actual, physical amount of frames. Wikipedia provides a fairly decent explanation of this type of video technology: http://en.wikipedia.org/wiki/Interlaced_video .
Best Description :
http://www.100fps.com/
Some sample code :
<?php
      // Author: holdoffhunger@gmail.com
  
    // Imagick Type
    // ---------------------------------------------
  $imagick_type = new Imagick();
  
    // Open File
    // ---------------------------------------------
    
  $file_to_grab = "image_workshop_directory/test.jpg";
  
  $file_handle_for_viewing_image_file = fopen($file_to_grab, 'a+');
  
    // Grab File
    // ---------------------------------------------
  $imagick_type->readImageFile($file_handle_for_viewing_image_file);
  
    // Get Rendering Intent Values
    // ---------------------------------------------
  $imagick_rendering_intent = $imagick_type->getImageRenderingIntent();
  
  switch($imagick_rendering_intent)
  {
    case '0':
      $image_rendering_intent_evaluated = "Undefined";
      break;
      
    case '1':
      $image_rendering_intent_evaluated = "Saturation";
      break;
      
    case '2':
      $image_rendering_intent_evaluated = "Perceptual";
      break;
      
    case '3':
      $image_rendering_intent_evaluated = "Absolute";
      break;
      
    case '4':
      $image_rendering_intent_evaluated = "Relative";
      break;
  }
  
    // Print Rendering Intent Values
    // ---------------------------------------------
  
  print("# $imagick_rendering_intent - $image_rendering_intent_evaluated");
?>