Tesseract always saying image is "Bad Base-64"

[carlo318]

Hi, I have installed the plugin in an App for Android made with Ionic Framework. I am trying to get an image with cordova-image-camera which is getting a base64 image, which is correct (if I use it in an <IMG src=""> it show the image correctly). I pass that base64 as imageData input, but Tesseract always get an Exception "Bad Base-64". Do you what could be the reason?

Example code:

try {
	TesseractPlugin.loadLanguage('ita', function(response) {
		debugLog('Loading OCR language successful');
	}, function(reason) {
		debugLog('Error on loading OCR file for your language. ' + reason);
	});

	var _testImage ="data:image/jpeg;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAANCAIAAAArLKlOAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAABvSURBVChTpZBRFgARCEWty4JaT6tpMxbTiITDOI25X9S7QuArfmsJY1CAtCbUesSk+4JpBK1DYKIsI1IW37SOHD+llsJOqxPG0FmTfGF6WsY1rf7BqPq0JXbQcqsN+DSthBXL2HMVa+wu6eBKY34AAZZMtGg8cLgAAAAASUVORK5CYII=";
	TesseractPlugin.recognizeText(_testImage  , 'ita', function(recognizedText) {
		debugLog("Tesseract recognized text: " + recognizedText);
	}, function(error) {
		debugLog('Error recognizing text from image: ' + error);
	});
}
catch(e) {
	debugLog("Tesseract Error: " + objToString(e.message) );
}

The loadLanguage() call works successfully. The recognizeText() always returns the function(reason), with the message: "Bad Base-64";

Thankyou. Carlo

[NBAMj]

I'm also getting the same error. Any update?

[NBAMj]

I was passing the wrong option to the Camera Plugin. It should be cameraOptions.DestinationType.DATA_URL

@carlo318 in your case, pass the _testImage without prefixing it with data:image/jpep:base64, and that should be it

[carlo318]

I tried your suggestion @NBAMj , but now it does'nt give me any feedback, neither successful, nor failed. With or without the prefix data:image/jpeg:base64, How comes?

I also put try catch outside Tesseract and inside any function (successful or failed), but nothing happens. Could it be any issue with Java? The last version is always 0.0.1?

Thankyou.

[ShailBag]

Any resolution to this? I am getting same issue.

[rjurado01]

I resolve the problem like this:

var myimage = document.getElementById('smallImage').src.replace('data:image/jpeg;base64,', '');

TesseractPlugin.recognizeText(myimage, 'eng', function(recognizedText) {
  console.log(recognizedText);
}, function(reason) {
  console.log('Error on recognizing text from image. ' + reason);
});