Error detecting numbers

[Valerio Brunori]

Hello everybody!

I'm a problem with the TEXT_DOCUMENTS for detecting number.

For istance in this image, where it should simply detect 3 numbers "08 01 1929" that is a born date in format day-month-year, it seems to rotate the image of 180° and so understand "616r ro 80". How can I suggest to the algorithm that some images are supposed to be numbers, and that it doesn't have to rotate the image?

 Thank you in advance!

Valerio

[Eduardo Ortiz Caraveo]

You could be able to achieve this by making use of OCR.

[Valerio Brunori]

Yes, I make use of OCR Tool Vision but maybe I'm wrong in something

The very simple PHP code I use is like this:

require "/var/www/vendor/autoload.php";
use Google\Cloud\Vision\VisionClient;

$vision=new VisionClient(['keyFile'=>json_decode(file_get_contents("*******.json"),true)]);

$image = fopen($imageName,'r');

$processedImage=$vision->image($image,['DOCUMENT_TEXT_DETECTION']);
$result=$vision->annotate($ processedImage);

I achieve the same result than the "Try it!" demo page. And I don't know in this code how to hint the algorithm that I'm finding numbers and to not rotate the image.

It's seems very strange. With alphabetical words it works quite well, with number not.

    

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[Eduardo Ortiz Caraveo]

You might want to see what is different from the PHP code you are using, since it seems that the issue is due to the code you are running.

[Valerio Brunori]

No, the problem is that my PHP code achieve the same result than the "Try it!" demo page, but they both don't manage to achieve the real sequence of number that is "08 01 1929", both rotate the image of 180 degrees, and they both see "616r ro 80" that is something similar to the image rotated. 9 becomes 6, etc...

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[Jose Gutierrez Paliza]

You can use a Block Text Detection only for the Numbers as mentioned in this post.

Also there are sometimes that TEXT_DETECTION is not always the best when detecting Numbers sometimes is better to create your own TensorFlow Model so you can check this post that explains a system setup to detect number plates(A specific number format).

Also check that Vision API supports libraries such as enum for the FeatureType enumeration.