129 lines
4.1 KiB
PHP
129 lines
4.1 KiB
PHP
<?php
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namespace App\Http\Controllers\Api;
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use Illuminate\Http\Request;
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use thiagoalessio\TesseractOCR\TesseractOCR;
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class OCRController extends ApiController
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{
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/**
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* ApplicationController constructor.
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*/
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public function __construct()
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{
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// $this->middleware('auth:sanctum')
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// ->only(['show']);
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}
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/**
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* Display the specified resource.
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*
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* @param Request $request The log request.
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* @return \Illuminate\Http\Response
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*/
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public function show(Request $request)
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{
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// if ($request->user()?->hasPermission('logs/' . $name) === true) {
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$url = $request->get('url');
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if ($url !== null) {
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$data = [];
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$oem = $request->get('oem', 0);
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$digits = $request->get('digits');
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$allowlist = $request->get('allowlist');
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$tmpfname = tempnam(sys_get_temp_dir(), 'download');
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
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$curlResult = curl_exec($ch);
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curl_close($ch);
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file_put_contents($tmpfname, $curlResult);
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// Raw OCR
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$ocr = new TesseractOCR();
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$ocr->image($tmpfname);
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$ocr->oem($oem);
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if ($digits !== null) {
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$ocr->digits();
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}
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if ($allowlist !== null) {
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$ocr->allowlist($allowlist);
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}
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$result = $ocr->run(500);
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$data['ocr_raw'] = $result;
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$basefile_path = preg_replace('/\\.[^.\\s]{3,4}$/', '', $tmpfname);
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// Greyscale OCR
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$result = '';
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$imgcreate = imagecreatefrompng($tmpfname);
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if ($imgcreate !== false && imagefilter($imgcreate, IMG_FILTER_GRAYSCALE) === true) {
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$tmpfname_greyscape = $basefile_path . '_grayscale.png';
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imagepng($imgcreate, $tmpfname_greyscape);
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$ocr->image($tmpfname_greyscape);
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$result = $ocr->run(500);
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}
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$data['ocr_greyscale'] = $result;
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imagedestroy($imgcreate);
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unlink($tmpfname);
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return $this->respondJson($data);
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}//end if
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return $this->respondWithErrors(['url' => 'url is missing']);
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}
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// $ffmpeg = FFMpeg\FFMpeg::create();
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// // Load the input video
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// $inputFile = $ffmpeg->open('input.mp4');
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// // Split the video into individual frames
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// $videoFrames = $inputFile->frames();
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// foreach ($videoFrames as $frame) {
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// // Save the frame as a PNG
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// $frame->save(new FFMpeg\Format\Video\PNG(), 'frame-' . $frame->getMetadata('pts') . '.png');
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// // Pass the PNG to Tesseract for processing
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// exec("tesseract frame-" . $frame->getMetadata('pts') . ".png output");
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// }
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// // Read the output from Tesseract
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// $text = file_get_contents("output.txt");
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// // Do something with the text from Tesseract
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// echo $text;
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// function is_ani($filename) {
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// if(!($fh = @fopen($filename, 'rb')))
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// return false;
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// $count = 0;
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// //an animated gif contains multiple "frames", with each frame having a
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// //header made up of:
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// // * a static 4-byte sequence (\x00\x21\xF9\x04)
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// // * 4 variable bytes
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// // * a static 2-byte sequence (\x00\x2C) (some variants may use \x00\x21 ?)
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// // We read through the file til we reach the end of the file, or we've found
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// // at least 2 frame headers
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// $chunk = false;
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// while(!feof($fh) && $count < 2) {
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// //add the last 20 characters from the previous string, to make sure the searched pattern is not split.
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// $chunk = ($chunk ? substr($chunk, -20) : "") . fread($fh, 1024 * 100); //read 100kb at a time
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// $count += preg_match_all('#\x00\x21\xF9\x04.{4}\x00(\x2C|\x21)#s', $chunk, $matches);
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// }
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// fclose($fh);
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// return $count > 1;
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// }
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}
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