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PHP library for image processing
<?php
namespace PHPImageWorkshop;
use PHPImageWorkshop\Core\ImageWorkshopLayer as ImageWorkshopLayer;
use PHPImageWorkshop\Core\ImageWorkshopLib as ImageWorkshopLib;
use PHPImageWorkshop\Exception\ImageWorkshopException as ImageWorkshopException;
class ImageWorkshop
{ 
    const ERROR_NOT_AN_IMAGE_FILE = 1;
    const ERROR_IMAGE_NOT_FOUND = 2;
    const ERROR_NOT_READABLE_FILE = 3;
    const ERROR_CREATE_IMAGE_FROM_STRING = 4;
    public static function initFromPath($path, $fixOrientation = false)
    {
        if (false === filter_var($path, FILTER_VALIDATE_URL) && !file_exists($path)) {
            throw new ImageWorkshopException(sprintf('File "%s" not exists.', $path), static::ERROR_IMAGE_NOT_FOUND);
        }

Image processing (image processing) is a technology that uses computers to analyze images to achieve the desired results. Also called image processing. Image processing generally refers to digital image processing. A digital image refers to a large two-dimensional array captured by industrial cameras, video cameras, scanners and other equipment. The elements of the array are called pixels, and their values ​​are called grayscale values. Image processing technology generally includes three parts: image compression, enhancement and restoration, matching, description and recognition.

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