tigra-image-library/gd2-imaging

An advanced image processing library.

1.7.5 2018-03-11 18:18 UTC

Requires

• php: ^5.4
• ext-gd2: *

LGPL-3.0-only

• Artur Graniszewski

• php
• captcha
• OCR
• crop
• rotate
• hue
• GD2
• hsl
• hsv
• Blur
• imaging
• histogram
• saturation
• luminance
• deskew
• rescale
• quantizer
• remove noise
• hdr
• pixel shader
• pastel

README

Introduction

This class can apply several types of advanced image processing effects.

Features

Currently it can:

• Use the Hough transform to detect skew angles and deskew an image
• Detect the background color of an image
• Perform image quantization basic text recognition (OCR) in an image to eventually read text used for CAPTCHA validation
• Apply the pastel effect on an image
• Crop an image preserving the image aspect
• Remove a noise from an image
• Rotate or rescale an image detecting its background color
• Generate an histograms for an image
• Calculate pixel luminance (intensity), hue, saturation and chromacity of the RGB colors in three different color modes (HSL, HSI, HSV)
• Change hue of the image
• Change luminance of the image
• Change saturation of the image
• Create High-Definition-Range (HDR) images
• Use advanced programmable Pixel Shader
• Merge two images using eight different blending modes:

• addition
• divide
• subtract
• darken
• lighten
• difference
• multiply
• opacity

• Apply experimental blur effect with customizable kernel size.

Sample operations

Sample code

Please see the examples directory