The Gmagick::medianfilterimage() function is an inbuilt function in PHP which is used to apply a digital filter that improves the quality of a noisy image. This filter replaces each pixel by the median of its neighboring pixels which is defined by the radius.
Syntax:
void Gmagick::medianfilterimage( $radius )
Parameters: This function accepts a single parameter $radius which is used to hold the radius of the pixel.
Return Value: This function returns the Gmagick object with median filter.
Errors/Exceptions: This function throws GmagickException on error.
Below programs illustrate the Gmagick::medianfilterimage() function in PHP:
Program 1:
Input Image:
<?php // Create a Gmagick object $gmagick = new Gmagick(
// Use medianfilterimage function $gmagick ->medianfilterimage(12);
header( 'Content-type: image/png' );
// Output the image echo $gmagick ;
?> |
Output:
Program 2:
<?php // Create a GmagickDraw object $draw = new GmagickDraw();
// Create GmagickPixel object $strokeColor = new GmagickPixel( 'Red' );
$fillColor = new GmagickPixel( 'Green' );
// Set the color, opacity of image $draw ->setStrokeOpacity(1);
$draw ->setStrokeColor( 'Red' );
$draw ->setFillColor( 'Green' );
// Set the width and height of image $draw ->setStrokeWidth(7);
$draw ->setFontSize(72);
// Function to draw circle $draw ->circle(250, 250, 100, 150);
$gmagick = new Gmagick();
$gmagick ->newImage(500, 500, 'White' );
$gmagick ->setImageFormat( "png" );
$gmagick ->drawImage( $draw );
// Use medianfilterimage function $gmagick ->medianfilterimage(12);
// Display the output image header( "Content-Type: image/png" );
echo $gmagick ->getImageBlob();
?> |
Output:
Reference: http://php.net/manual/en/gmagick.medianfilterimage.php