Google Cloud Vision save imagen after detect objects - php

Question

I am trying to save a image in my database after detect objects with Google cloud vision. I am using php, framework laravel, this is my code,
function detect_object($imagen){
$path = $imagen->getRealPath();
$imageAnnotator = new ImageAnnotatorClient(['credentials' => base_path('credentials.json')]);
$output = imagecreatefromjpeg($path);
list($width, $height, $type, $attr) = getimagesize($path);
# annotate the image
$image = file_get_contents($path);
$response = $imageAnnotator->objectLocalization($image);
$objects = $response->getLocalizedObjectAnnotations();
foreach ($objects as $object) {
$name = $object->getName();
$score = $object->getScore();
$vertices = $object->getBoundingPoly()->getNormalizedVertices();
// printf('%s (confidence %f)):' . PHP_EOL, $name, $score);
// print('normalized bounding polygon vertices: ');
// foreach ($vertices as $vertex) {
// printf(' (%f, %f)', $vertex->getX(), $vertex->getY());
// }
// print(PHP_EOL);
$vertices_finales = [];
foreach ($vertices as $vertex) {
array_push($vertices_finales, ($vertex->getX() * $width));
array_push($vertices_finales, ($vertex->getY() * $height));
}
imagepolygon($output, $vertices_finales, (sizeof($vertices_finales) / 2), 0x00ff00);
imagestring($output, 5, ($vertices_finales[0] + 10), ($vertices_finales[1] + 10), $name, 0x00ff00);
}
header('Content-Type: image/jpeg');
imagejpeg($output);
imagedestroy($output);
$imageAnnotator->close();
}
Could you help me?
Thanks

Answer 1

I'm going to assume that you want to grab the raw binary generated by imagejpeg() after processing?
The only way i know how to do that is using output buffers.
instead of:
<?php
header('Content-Type: image/jpeg');
imagejpeg($output);
imagedestroy($output);
$imageAnnotator->close();
Do:
<?php
ob_start();
imagejpeg($output);
$imgData = ob_get_clean();
# Do what you want with imgData, like insert into a binary field in a db, write to disk, etc
imagedestroy($output);
$imageAnnotator->close();
If you also want to output the image to the browser, return $imgData from your detect_object() function and echo it to the browser
<?php
$imgData = detect_object($imagen);
header('Content-Type: image/jpeg');
echo $imgData