Brightness & Contrast

Changing the Brightness

public Image::brightness(int $level): ImageInterface

Change the brightness of the current image by a given level. Use values between -100 for min. brightness 0 for no change and +100 for max. brightness.

Parameters

Name Type Description
level integer Level of brightness change

Examples

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = new ImageManager('gd');

// reading an image
$image = $manager->make('images/example.png');

// increase brightness
$image = $image->brightness(35);

Changing the Contrast

public Image::contrast(int $level): ImageInterface

Change the contrast of the current image by a given level. Use values between -100 for min. contrast 0 for no change and +100 for max. contrast.

Parameters

Name Type Description
level integer Level of contrast change

Examples

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = new ImageManager('gd');

// reading an image
$image = $manager->make('images/example.png');

// decreasing the contrast
$image = $image->contrast(-10);

Various Effects

Blur Effect

public Image::blur(int $amount = 5): ImageInterface

Apply a gaussian blur effect on the current image. Use the optional amount argument to define the effect strenght with values between 0 and 100.

With GD driver this method is performance intensive on larger amounts of blur. Use with care.

Parameters

Name Type Description
amount integer Effect strength value (0 - 100)

Examples

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = new ImageManager('gd');

// reading an image
$image = $manager->make('images/example.png');

// apply blurring effect
$image = $image->blur(3);

Sharpening Effect

public Image::sharpen(int $amount = 10): ImageInterface

Sharpen the current image instance with an optional amount.

Parameters

Name Type Description
amount integer The amount of the sharpening strength. (0 - 100)

Examples

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = new ImageManager('gd');

// reading an image
$image = $manager->make('images/example.png');

// apply blurring effect
$image = $image->blur(3);

Invert colors

public Image::invert(): ImageInterface

Invert all colors of the current image.

Examples

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = new ImageManager('gd');

// reading an image
$image = $manager->make('images/example.png');

// invert colors
$image = $image->invert();

Pixelation Effect

public Image::pixelate(int $size): ImageInterface

Applies a pixelation effect on the current image with a given pixel size.

Parameters

Name Type Description
size integer Size of the pixels.

Examples

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = new ImageManager('gd');

// reading an image
$image = $manager->make('images/example.png');

// apply the pixelation effect
$image = $image->pixelate(12);