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Imagick::setImageBackgroundColor

(PECL imagick 2, PECL imagick 3)

Imagick::setImageBackgroundColor — Sets the image background color

说明

public Imagick::setImageBackgroundColor(mixed $background): bool

Sets the image background color.

参数

background

返回值

成功时返回 true。

错误／异常

错误时抛出 ImagickException。

更新日志

版本	说明
PECL imagick 2.1.0	Now allows a string representing the color as the parameter. Previous versions allow only an ImagickPixel object.

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User Contributed Notes 2 notes

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mjunaidahmad at outlook dot com ¶

6 years ago

<?php

  $im = new \Imagick();

        /* read image (914x784) */
   
     $im->readImage($_SERVER['DOCUMENT_ROOT']."/path/toimage/".$inputfront);
        
        $im->setImageBackgroundColor(new \ImagickPixel('transparent')); /* this is equal to -background none (in imagemagick command options ) */
  
        /*Control points for the distortion in order to check weather setImageBackgound is working properly*/

        $controlPoints = array( 0,0,
            280,0,

            994,0,
            914,50,

            994,862,
            784,842,

            0,862,
            110,762);

        /* Perform the distortion */
        $im->distortImage(\Imagick::DISTORTION_PERSPECTIVE, $controlPoints, true);

        /* Ouput the image */
        $output_front_distort="Projects/path/where you want to store image/distorted_book.png";
    
       header("Content-Type: image/png");
        $im->writeImage($_SERVER['DOCUMENT_ROOT']."/designerr/public/".$output_front_distort);

?>

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-17

Matthias Zartmann ¶

9 years ago

Small example to optimize a gray scanned image:
<?php
   $im = new Imagick();
   $im->readImage("~/scaninput_300DPI.tiff");
  //deskew the image 
   $im->deskewImage(40); 
  //Crop to A4 and scanner pageoffset 50
   $im->cropImage(2480, 3416, 50, 0);
  //Need a Monochrome Image
   $im->setImageColorspace(2);
   $im->thresholdImage(11000);
  //Compressen tiff CCITT Group 4 
   $im->setImageCompression(Imagick::COMPRESSION_GROUP4);
   $im->writeimage("~/monochrome_300DPI.tiff");
  //Cleanup   
   $im->clear();
   $im->destroy();
?>

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