Simulates a pencil sketch

# Imagick::sketchImage

(PECL imagick 2, PECL imagick 3)

Imagick::sketchImage — Simulates a pencil sketch

### Description

public Imagick::sketchImage(float `$radius`, float `$sigma`, float `$angle`): bool

Simulates a pencil sketch. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and Imagick::sketchImage() selects a suitable radius for you. Angle gives the angle of the blurring motion. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.

### Parameters

`radius`

  The radius of the Gaussian, in pixels, not counting the center pixel

`sigma`

  The standard deviation of the Gaussian, in pixels.

`angle`

  Apply the effect along this angle.

### Return Values

Returns `true` on success.

### Examples

Example #1 Imagick::sketchImage()

`<?php
function sketchImage($imagePath, $radius, $sigma, $angle) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->sketchimage($radius, $sigma, $angle);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>`
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