Call Now

WhatsApp

Go back
to top

Arrow Icon
Site Logo

How to read or detect text from image using Google Vision API

Shape Image Layout Star Icon Star Icon

How to read or detect text from image using Google Vision API

In this blog post, i will be able to allow you to skills to read content of images with Google Vision API.

Google Vision API can easily detect and extract text from a picture . There are two annotation features (TEXT_DETECTION, DOCUMENT_TEXT_DETECTION) that perform Optical Character Recognition and return the extracted text, if any.

In order to use Google Vision API, you'll need to create new project or select an existing project and enable the Vision API.

Below are the example to read the text from image using HTML, Css and PHP


<!DOCTYPE html>
<html>
<head>
    <title>How to read or detect text from image using Google Vision API </title>
</head>
<body>

    <form enctype="multipart/form-data" action="" method="POST">
        Choose an image to upload: <input name="image" type="file" /><br />
        <input type="submit" value="Upload Document" />
    </form>

<?php

$url = "https://vision.googleapis.com/v1/images:annotate?key={api_key}";
$detection_type = "TEXT_DETECTION";
$image_validation = array('image/jpeg','image/png','image/gif');

if($_FILES){

    // validate uploaded file for allowed mime type
    if(in_array($_FILES['image']['type'],$image_validation)){            

        // base64 encode image
        $image = file_get_contents($_FILES['image']['tmp_name']);
        $image_base64 = base64_encode($image);

        $json_request ='{
                  "requests": [
                    {
                    "image": {
                        "content":"' . $image_base64. '"
                      },
                      "features": [
                          {
                              "type": "' .$detection_type. '",
                              "maxResults": 200
                          }
                      ]
                    }
                ]
            }';

        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-type: application/json"));
        curl_setopt($curl, CURLOPT_POST, true);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $json_request);
        $json_response = curl_exec($curl);
        $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
        curl_close($curl);

        // verify if we got a correct response
        if ( $status != 200 ) {
            die("Something when wrong. Status code: $status" );
        }
        
        // create an image identifier for the uploaded file
        switch($_FILES['image']['type']){
            case 'image/jpeg':
                $im = imagecreatefromjpeg($_FILES['image']['tmp_name']);
                break;
            case 'image/png':
                $im = imagecreatefrompng($_FILES['image']['tmp_name']);
                break;
            case 'image/gif':
                $im = imagecreatefromgif($_FILES['image']['tmp_name']);
                break;
        }

        // transform the json response to an associative array
        $response = json_decode($json_response, true);            
        // display the first text annotation
        echo'<pre>';
        print_r($response['responses'][0]['textAnnotations'][0]['description']);
        echo'</pre>';
    
    }
    else{
        echo 'File type Invalied';
    }

    }
?>

</body>
</html>

Tags :

How Google Vision API works

Google vision API pricing

Google vision API documentation

Google vision API demo
How to read or detect text from image using Google Vision API

Document text detection google vision

Related Posts

How to read or detect text from image using Google Vision API, Google Vision API with PHP

Best Travel Website Design Ideas And Inspirations

In this article, we are going to discuss Travel Website Design Ideas And Inspirations. Everyone gath

Read More
How to read or detect text from image using Google Vision API, Google Vision API with PHP

How to Enable seo url in opencart ?

Enable SEO URLs in the OpenCart administrator  Sign in to your OpenCart administrator boa

Read More
How to read or detect text from image using Google Vision API, Google Vision API with PHP

Web Portal Development Company

Blazingcoders is a Web design and development company. Do you have an innovative Idea about the Web

Read More