- PHP 手册
- 函数参考
- 图像生成和处理
- ImageMagick
- Imagick
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 2 notes
up down 0 mjunaidahmad at outlook dot com ¶4 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);
?>
up
down
-18
Matthias Zartmann ¶8 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();
?>
add a note
官方地址：https://www.php.net/manual/en/imagick.setimagebackgroundcolor.php