230 lines
8.5 KiB
PHP
230 lines
8.5 KiB
PHP
<?php
|
|
|
|
namespace App\Http\Controllers\Api;
|
|
|
|
use Illuminate\Http\Request;
|
|
use thiagoalessio\TesseractOCR\TesseractOCR;
|
|
use FFMpeg;
|
|
use App\Enum\CurlErrorCodes;
|
|
|
|
class OCRController extends ApiController
|
|
{
|
|
/**
|
|
* ApplicationController constructor.
|
|
*/
|
|
public function __construct()
|
|
{
|
|
// $this->middleware('auth:sanctum')
|
|
// ->only(['show']);
|
|
}
|
|
|
|
/**
|
|
* Display the specified resource.
|
|
*
|
|
* @param Request $request The log request.
|
|
* @return \Illuminate\Http\Response
|
|
*/
|
|
public function show(Request $request)
|
|
{
|
|
// if ($request->user()?->hasPermission('logs/' . $name) === true) {
|
|
$url = $request->get('url');
|
|
if ($url !== null) {
|
|
$data = ['ocr' => []];
|
|
|
|
$filters = $request->get('filters', ['tesseract']);
|
|
if(is_array($filters) === false) {
|
|
$filters = explode(',', $filters);
|
|
}
|
|
|
|
$tesseractOEM = $request->get('tesseract.oem');
|
|
$tesseractDigits = $request->get('tesseract.digits');
|
|
$tesseractAllowlist = $request->get('tesseract.allowlist');
|
|
|
|
// Download URL
|
|
$urlDownloadFilePath = tempnam(sys_get_temp_dir(), 'download');
|
|
$maxDownloadSize = (1024 * 1024); // 1MB
|
|
$ch = curl_init();
|
|
curl_setopt($ch, CURLOPT_URL, $url);
|
|
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
|
|
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
|
|
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
|
|
|
|
// We need progress updates to break the connection mid-way
|
|
curl_setopt($ch, CURLOPT_BUFFERSIZE, 128); // more progress info
|
|
curl_setopt($ch, CURLOPT_NOPROGRESS, false);
|
|
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, function(
|
|
$downloadSize, $downloaded, $uploadSize, $uploaded
|
|
) use($maxDownloadSize) {
|
|
return ($downloaded > $maxDownloadSize) ? 1 : 0;
|
|
});
|
|
|
|
$curlResult = curl_exec($ch);
|
|
$curlError = curl_errno($ch);
|
|
$curlSize = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
|
|
curl_close($ch);
|
|
if($curlError !== 0) {
|
|
$error = 'File size is larger then allowed';
|
|
if($curlError !== CurlErrorCodes::CURLE_ABORTED_BY_CALLBACK) {
|
|
$error = CurlErrorCodes::getMessage($curlError);
|
|
}
|
|
|
|
return $this->respondWithErrors(['url' => $error]);
|
|
}
|
|
|
|
// Save url file
|
|
file_put_contents($urlDownloadFilePath, $curlResult);
|
|
$urlDownloadFilePathBase = preg_replace('/\\.[^.\\s]{3,4}$/', '', $urlDownloadFilePath);
|
|
|
|
// tesseract (overall)
|
|
$ocr = null;
|
|
foreach($filters as $filterItem) {
|
|
if(str_starts_with($filterItem, 'tesseract') === true) {
|
|
$ocr = new TesseractOCR();
|
|
$ocr->image($urlDownloadFilePath);
|
|
if ($tesseractOEM !== null) {
|
|
$ocr->oem($tesseractOEM);
|
|
}
|
|
if ($tesseractDigits !== null) {
|
|
$ocr->digits();
|
|
}
|
|
if ($tesseractAllowlist !== null) {
|
|
$ocr->allowlist($tesseractAllowlist);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Image Filter Function
|
|
$tesseractImageFilterFunc = function($filter, $options = null) use($curlResult, $curlSize, $ocr) {
|
|
$result = '';
|
|
$img = imagecreatefromstring($curlResult);
|
|
if ($img !== false && (($options !== null && imagefilter($img, $filter, $options) === true) || ($options === null && imagefilter($img, $filter) === true))) {
|
|
|
|
ob_start();
|
|
imagepng($img);
|
|
$imgData = ob_get_contents();
|
|
ob_end_clean();
|
|
$imgDataSize = strlen($imgData);
|
|
|
|
$ocr->imageData($imgData, $imgDataSize);
|
|
imagedestroy($img);
|
|
|
|
$result = $ocr->run(500);
|
|
}
|
|
|
|
return $result;
|
|
};
|
|
|
|
// Image Scale Function
|
|
$tesseractImageScaleFunc = function($scaleFunc) use ($curlResult, $ocr) {
|
|
$result = '';
|
|
$srcImage = imagecreatefromstring($curlResult);
|
|
$srcWidth = imagesx($srcImage);
|
|
$srcHeight = imagesy($srcImage);
|
|
|
|
$dstWidth = $scaleFunc($srcWidth);
|
|
$dstHeight = $scaleFunc($srcHeight);
|
|
$dstImage = imagecreatetruecolor($dstWidth, $dstHeight);
|
|
|
|
imagecopyresampled($dstImage, $srcImage, 0, 0, 0, 0, $dstWidth, $dstHeight, $srcWidth, $srcHeight);
|
|
|
|
ob_start();
|
|
imagepng($dstImage);
|
|
$imgData = ob_get_contents();
|
|
ob_end_clean();
|
|
$imgDataSize = strlen($imgData);
|
|
|
|
imagedestroy($srcImage);
|
|
imagedestroy($dstImage);
|
|
|
|
$ocr->imageData($imgData, $imgDataSize);
|
|
$result = $ocr->run(500);
|
|
return $result;
|
|
};
|
|
|
|
// filter: tesseract
|
|
if(in_array('tesseract', $filters) === true) {
|
|
$data['ocr']['tesseract'] = $ocr->run(500);
|
|
}
|
|
|
|
// filter: tesseract.grayscale
|
|
if (in_array('tesseract.grayscale', $filters) === true) {
|
|
$data['ocr']['tesseract.grayscale'] = $tesseractImageFilterFunc(IMG_FILTER_GRAYSCALE);
|
|
}
|
|
|
|
// filter: tesseract.double_scale
|
|
if (in_array('tesseract.double_scale', $filters) === true) {
|
|
$data['ocr']['tesseract.double_scale'] = $tesseractImageScaleFunc(function($size) {
|
|
return $size * 2;
|
|
});
|
|
}
|
|
|
|
// filter: tesseract.half_scale
|
|
if (in_array('tesseract.half_scale', $filters) === true) {
|
|
$data['ocr']['tesseract.half_scale'] = $tesseractImageScaleFunc(function($size) {
|
|
return $size / 2;
|
|
});
|
|
}
|
|
|
|
// filter: tesseract.edgedetect
|
|
if (in_array('tesseract.edgedetect', $filters) === true) {
|
|
$data['ocr']['tesseract.edgedetect'] = $tesseractImageFilterFunc(IMG_FILTER_EDGEDETECT);
|
|
}
|
|
|
|
// filter: tesseract.mean_removal
|
|
if (in_array('tesseract.mean_removal', $filters) === true) {
|
|
$data['ocr']['tesseract.mean_removal'] = $tesseractImageFilterFunc(IMG_FILTER_MEAN_REMOVAL);
|
|
}
|
|
|
|
// filter: tesseract.negate
|
|
if (in_array('tesseract.negate', $filters) === true) {
|
|
$data['ocr']['tesseract.negate'] = $tesseractImageFilterFunc(IMG_FILTER_NEGATE);
|
|
}
|
|
|
|
// filter: tesseract.pixelate
|
|
if (in_array('tesseract.pixelate', $filters) === true) {
|
|
$data['ocr']['tesseract.pixelate'] = $tesseractImageFilterFunc(IMG_FILTER_PIXELATE, 3);
|
|
}
|
|
|
|
// filter: keras
|
|
if(in_array('keras', $filters) === true) {
|
|
$cmd = '/usr/bin/python3 ' . base_path() . '/scripts/keras_oc.py ' . urlencode($url);
|
|
$command = escapeshellcmd($cmd);
|
|
$output = shell_exec($cmd);
|
|
if ($output !== null && strlen($output) > 0) {
|
|
$output = substr($output, strpos($output, '----------START----------') + 25);
|
|
} else {
|
|
$output = '';
|
|
}
|
|
$data['ocr']['keras'] = $output;
|
|
}
|
|
|
|
unlink($urlDownloadFilePath);
|
|
return $this->respondJson($data);
|
|
}//end if
|
|
|
|
return $this->respondWithErrors(['url' => 'url is missing']);
|
|
}
|
|
|
|
// $ffmpeg = FFMpeg\FFMpeg::create();
|
|
|
|
// // Load the input video
|
|
// $inputFile = $ffmpeg->open('input.mp4');
|
|
|
|
// // Split the video into individual frames
|
|
// $videoFrames = $inputFile->frames();
|
|
// foreach ($videoFrames as $frame) {
|
|
// // Save the frame as a PNG
|
|
// $frame->save(new FFMpeg\Format\Video\PNG(), 'frame-' . $frame->getMetadata('pts') . '.png');
|
|
|
|
// // Pass the PNG to Tesseract for processing
|
|
// exec("tesseract frame-" . $frame->getMetadata('pts') . ".png output");
|
|
// }
|
|
|
|
// // Read the output from Tesseract
|
|
// $text = file_get_contents("output.txt");
|
|
|
|
// // Do something with the text from Tesseract
|
|
// echo $text;
|
|
}
|