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.

User Contributed Notes

mjunaidahmad at outlook dot com 28-Jul-2017 06:02


<?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);



?>

Matthias Zartmann 17-Jun-2014 08:33


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();

?>