IMAGEMANIPULATION

Fork me on GitHub: https://github.com/elgervb/imagemanipulation

Library to manipulate images using PHP's GD library. Most of the functionality is available through the ImageBuilder facade. This way chaining of image filters and thumbnailing is possible, like:

ImageBuilder::create( new \SplFileInfo('image.jpg') )
  ->contrast( 20 ) // increase contrast
  ->colorize( '#DB3636' ) // apply a bit of red the the image
  ->flip( ImageFilterFlip::FLIP_VERTICALLY ) // flip image vertically
  ->save( new \SplFileInfo( 'image.new.png' ) ) // save the jpg image as png with filters applied
  ->render( 80 ); // render to browser with quality 80

Installation

With composer.json:

	"require" : {
		"elgervb/imagemanipulation": "^1.0"
	}

Requirements

PHP version >= 5.3 with GD library

FUNCTIONALITY

Filters

Lots of image filters. All of them listed below:

• brightness
• colorize
• comic
• contrast
• convolution 3x3 filters
• darken
• dodge
• duotone
• edge detect
• emboss
• find edges
• flip (horizonal, vertical, both)
• gamma correction
• gaussian blur
• grayscale
• hue rotate
• mean remove
• motion blur
• negative
• noise
• old cardboard
• opacity
• pixelate
• random blocks with custom size and color
• replace color
• reverse
• rounded corners
• scatter
• selective blur
• semi grayscale
• sepia
• sepia fast
• sharpen
• smooth
• sobel edge detect
• sobel edge enhance (based on convolution matrix)
• true color
• vignette

Overlay

Use an image as overlay on another image. Can be configured with overlay opacity, start and end position and fill options.

Reflection

Use the current image to make a reflection below the original image

Image repeater

Repeat images on a canvas, until it fits. This way we can create Warhol like images.

Rotate

Rotate images in degrees. When rotating an image not equal to 90, 180, 270 or 360 degrees, then optionally you can specify a background color for those oncovered edges.

Thumbnails

Create thumbnails on the fly. There are several strategies to use:

• Centered strategy: create a thumb from the center of an image. Ideal for creating square thumbs from not so square images
• Max strategy: resize the image to a max width or height keeping proportions. For example: when resizing an image (300x750) on max 500 pixels, the resulting image will be 200x500 pixels
• Percentage strategy: reduce the size of an image with a certain percentage.

Watermarking

Add a watermark to your image. Possible positions are: top, bottom, left, right, center, top right, top left, bottom right, bottom left.

Examples

Thumbnails

You can create thumbnails in several ways

centered

create a thumbnail which is centered in the middle of the image

Parameter	Default	Description
width	250	The new width of the image in pixels
height	250	The new height of the image in pixels

Examples

max

resize the image to a max width or height keeping proportions, thus restraining the image to a certain size

Parameter	Default	Description
width	250	The max width of the image in pixels
height	250	The max height of the image in pixels

Examples

percentage

reduce a image with a certain percentage

Parameter	Default	Description
percentage	250	The percentage to reduce the image with

Examples

square

Parameter	Default	Description
width	250	The new width of the image in pixels
height	250	The new height of the image in pixels

Examples

Available Filters

blocks

Add random blocks to an image with custom size and color

Parameter	Default	Description
number	100	The number of blocks
size	25	The size of the blocks in pixels
color	ffffff	The color of the blocks

Examples

brightness

Adjust the brightness of the image, either lighter or darker

Parameter	Default	Description
rate	20	The brightness level from -255 to 255, from darker to lighter

Examples

colorize

Blends a fill color with the image

Parameter	Default	Description
color	ffffff	The color to blend, either in hexadecimal or rgb(a)
opacity	null	The color opacity from 0 to 127

Examples

comic

Apply a sketchy comic filter to an image

Parameter	Default	Description
opacity	40	The opacity from 0 to 127

Examples

contrast

Changes the contrast of the image

Parameter	Default	Description
rate	5	The opacity from -100 to 100, from minimal contrast to high constrast

Examples

###darken Adjust the brightness of the image, either darker or lighter

Parameter	Default	Description
rate	20	The brightness level from -255 to 255, from lighter to darker

Examples

###dodge Dodge an image, resulting in a darker image

Parameter	Default	Description
rate	75	The dodge level between 0 and 100

Examples

###duotone Duotone filter. Enhances Red, Green or Blue or a combination

Parameter	Default	Description
red	0	The amount of red to add max = 255
green	0	The amount of green to add max = 255
blue	0	The amount of blue to add max = 255

Examples

###edgedetect Uses edge detection to highlight the edges in the image

Examples

###emboss Embosses the image

Examples

###findedges Find the edges in an image without color loss

Examples

###flip Flips an image

Parameter	Default	Description
mode	both	Direction to fip: vertical, horizontal or both

Examples

###gammacorrection Applies gamma correction

Parameter	Default	Description
input	1.0	Input
output	1.537	Output

Examples

###gaussianblur Blurs the image using the Gaussian method.

Examples

###grayscale Converts the colors to grayscale

Examples

###huerotate Rotete the hue of the image

Parameter	Default	Description
rotate	90	degrees to rotate

Examples

###meanremove Uses mean removal to achieve a "sketchy" effect

Examples

###motionblur Motion blurs the image

Examples

###negative Create a negative of an image

Examples

###noise add noise to the image

Parameter	Default	Description
rate	20	The amount of noise to apply

Examples

###oldcardboard Image filter to give the image an old cardboard look

Examples

###opacity Sets the opacity of an image

Parameter	Default	Description
opacity	80	A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.

Examples

###pixelate Pixelate an image

Parameter	Default	Description
rate	20	the blocksize in pixels

Examples

###rotate Rotate an image over an angle

Parameter	Default	Description
degrees	90	The degrees to rotate the image
color	null	The background color to apply

Examples

###scatter Scatter pixels around in a random way

Parameter	Default	Description
rate	5	the scatter size in pixels

Examples

###selectiveblur Image filter Selective Blur

Examples

###sepia Apply sepia to the image

Parameter	Default	Description
rate	15	the darken rate

Examples

###semigrayscale Applies grayscale to an image, optionally add a grayscale percentage

Parameter	Default	Description
rate	75	The grayscale rate

Examples

###sepiafast Apply sepia to the image (fast)

Examples

###sharpen Sharpens the image

Examples

###smooth Makes the image smoother.

Parameter	Default	Description
rate	5	the darken rate

Examples

###sobel Sobel edge detect (extremely slow...)

Examples

###sobeledge Sobel edge enhance

Examples

###truecolor Makes the image smoother.

Parameter	Default	Description
primary	ffffff	the primary color
secundary	000000	the secundary color

Examples

###vignette Applies a darker mask around the edges of the image

Examples