Image to Text Conversion using Google Cloud API

Image to Text Conversion is also called OCR. OCR means Optical Character Reader. Here we will use Google Cloud API to get texts from an image.

Source Code

$base64 = $_POST['base64'];

$data = [
    "requests" => [
        "image" => [
            "content"=> $base64
        ],
        "features"=> [
        [
          "maxResults" => 50,
          "type" => "LANDMARK_DETECTION"
        ],
        [
          "maxResults" => 50,
          "type" => "FACE_DETECTION"
        ],
        [
          "maxResults" => 50,
          "type" => "OBJECT_LOCALIZATION"
        ],
        [
          "maxResults" => 50,
          "type" => "LOGO_DETECTION"
        ],
        [
          "maxResults"=> 50,
          "type"=> "LABEL_DETECTION"
        ],
        [
          "maxResults"=> 50,
          "type"=> "DOCUMENT_TEXT_DETECTION"
        ],
        [
          "maxResults"=> 50,
          "type"=> "SAFE_SEARCH_DETECTION"
        ],
        [
          "maxResults"=> 50,
          "type"=> "IMAGE_PROPERTIES"
        ],
        [
          "maxResults"=> 50,
          "type"=> "CROP_HINTS"
        ],
        [
          "maxResults"=> 50,
          "type"=> "WEB_DETECTION"
        ]
      ]
    ]
];
$api_key = '********************************';
$url = "https://vision.googleapis.com/v1/images:annotate?key=".$api_key;

$payload = json_encode($data);

// Prepare new cURL resource
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLINFO_HEADER_OUT, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);

curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json',
        'Content-Length: ' . strlen($payload))
);

$result = json_decode(curl_exec($ch), true);
curl_close($ch);

if(isset($result['error']))
    $resp = array('status'=>'fail','message'=>$result['error']['message']);

if(isset($result['responses']))
    $resp = array('status'=>'success','data'=>$result);

$json = json_encode($resp);
print_r($json);

Sample Project URL : https://github.com/CodexWP/Image-to-Text-Converter