Image Effects

Learn how to apply various image effects using the Intervention Image library. Adjust brightness, contrast, and colors, convert to greyscale, add gamma correction, mirror, rotate, blur, sharpen, invert colors, pixelate, and reduce colors.

• Brightness, Contrast & Colors
  • Change the Image Brightness
  • Change the Image Contrast
  • Gamma Correction
  • Color Correction
  • Convert image to a greyscale version
• Various Effects
  • Mirror Image Horizontally
  • Mirror Image Vertically
  • Image Rotation
  • Image Orientation According to Exif Data
  • Blur Effect
  • Sharpening Effect
  • Invert Colors
  • Pixelation Effect
  • Reduce Colors

Brightness, Contrast & Colors

Change the Image 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

Example

use Intervention\Image\ImageManager;
use Intervention\Image\Drivers\Imagick\Driver;

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

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

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

Change the Image 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

Example

use Intervention\Image\ImageManager;
use Intervention\Image\Drivers\Gd\Driver;

// create new manager instance with desired driver
$manager = new ImageManager(Driver::class);

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

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

Gamma Correction

public Image::gamma(float $gamma): ImageInterface

Apply a gamma correction operation on the current image.

Parameters

Example

use Intervention\Image\ImageManager;

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

// read an image
$image = $manager->read('images/example.jpg');

// apply gamma correction
$image = $image->gamma(1.7);

Color Correction

public Image::colorize(int $red = 0, int $green = 0, int $blue = 0): ImageInterface

Change the intensity level of the given color values of red, green and blue. The input values are normalized so you have to include parameters from 100 for maximum color intesity to 0 for no change and -100 to remove all the certain color on the image.

Parameters

Example

use Intervention\Image\ImageManager;
use Intervention\Image\Drivers\Gd\Driver;

// create new manager instance with desired driver
$manager = ImageManager::withDriver(Driver::class);

// read an image
$image = $manager->read('images/example.jpg');

// change colors to a blue & green tone
$image = $image->colorize(blue: 15, green: 10);

Convert image to a greyscale version

public Image::greyscale(): ImageInterface

Converts the current image into a greyscale version.

Example

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = ImageManager::imagick();

// read a colored image
$image = $manager->read('images/example.jpg');

// turn image into a greyscale version
$image = $image->greyscale();

Various Effects

Mirror Image Horizontally

public Image::flop(): ImageInterface

Mirror the current image horizontally.

Example

use Intervention\Image\ImageManager;
use Intervention\Image\Drivers\Imagick\Driver;

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

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

// mirror image horizontally
$image = $image->flop();

Mirror Image Vertically

public Image::flip(): ImageInterface

Mirror the current image vertically.

Example

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = ImageManager::imagick();

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

// mirror image vertically
$image = $image->flip();

Image Rotation

public Image::rotate(float $angle, mixed $background = 'ffffff'): ImageInterface

Rotates the current image counterclockwise by the specified angle. Optionally, specify a background color to fill the newly created uncovered areas after the rotation.

Parameters

Example

use Intervention\Image\ImageManager;

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

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

// rotate image 45 degrees clockwise 
$image = $image->rotate(-45);

Image Orientation According to Exif Data

public Image::orient(): ImageInterface

This method uses Exif data to automatically orient images correctly. This rotation is performed automatically by default. So you don't have to call this method unless you have deactivated the auto orientation in the ImageManager configuration.

Example

use Intervention\Image\ImageManager;

// create new manager instance without auto exif orientation
$manager = ImageManager::gd(autoOrientation: false);

// read the image
$image = $manager->read('images/example.jpg');

// orient image according to exif data
$image = $image->orient();

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

Example

use Intervention\Image\ImageManager;
use Intervention\Image\Drivers\Gd\Driver;

// create new manager instance with desired driver
$manager = new ImageManager(Driver::class);

// reading an image
$image = $manager->read('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

Example

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = ImageManager::imagick();

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

// apply sharpening effect
$image = $image->sharpen(3);

Invert Colors

public Image::invert(): ImageInterface

Invert all colors of the current image.

Example

use Intervention\Image\ImageManager;

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

// reading an image
$image = $manager->read('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

Example

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = ImageManager::withDriver(new Driver());

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

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

Reduce Colors

public Image::reduceColors(int $limit, mixed $background = 'transparent'): ImageInterface

Apply color quantization to the current image by reducing the numbers of distinct colors in the current image to the given limit. The number of colors is lowered in a way that the new image should be as visually similar as possible.

With GD driver (semi-)transparent colors that lose their transparency as a result of the reduction process are blended against the given background color.

Parameters

Example

use Intervention\Image\ImageManager;

// create new manager instance with desired driver
$manager = ImageManager::imagick();

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

// quantize colors to a maximum of 16
$image = $image->reduceColors(16);