PHP | Gmagick addnoiseimage() Function
The Gmagick::addnoiseimage() function is an inbuilt function in PHP which is used to add noise in given image. The intensity of noise depends on noise constants and channel types. The image noise is the random variation of brightness and contrast in an image.
Syntax:
Gmagick Gmagick::addnoiseimage ( $noise_type )
Parameters: This function accepts a single parameter $noise_type which is used to set the noise types.
Return Value: This function returns the Gmagick object with noise.
Errors/Exceptions: This function throws GmagickException on error.
Below programs illustrates the Gmagick::addnoiseimage() function in PHP:
Original Image 1:
Program 1:
PHP
<?php
$gmagick = new Gmagick(
$gmagick ->addnoiseimage(2);
header( 'Content-type: image/png' );
echo $gmagick ;
?>
|
Output:
Program 2:
PHP
<?php
$draw = new GmagickDraw();
$strokeColor = new GmagickPixel( 'Red' );
$fillColor = new GmagickPixel( 'Green' );
$draw ->setStrokeOpacity(1);
$draw ->setStrokeColor( 'Red' );
$draw ->setFillColor( 'Green' );
$draw ->setStrokeWidth(7);
$draw ->setFontSize(72);
$draw ->circle(250, 250, 100, 150);
$gmagick = new Gmagick();
$gmagick ->newImage(500, 500, 'White' );
$gmagick ->setImageFormat( "png" );
$gmagick ->drawImage( $draw );
$gmagick ->addnoiseimage(5);
header( "Content-Type: image/png" );
echo $gmagick ->getImageBlob();
?>
|
Output:
Reference: http://php.net/manual/en/gmagick.addnoiseimage.php
Last Updated :
06 Nov, 2020
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