So I've been trying to use tesseract ocr, (specifically tess-two) for an
android project to scan some symbols.
Everything works fine but sometimes the recognized String is returned as
null. One of the solutions I found was to set the variable save_blob_choices to
true in order to have tesseract save alternatives for recognition.
But I don't know if it indeed is supposed to do that. Where does it save
the alternatives? How do I access them?
Of course if you have any other solution apart from using this variable,
please tell me.
Here is my code:
TessBaseAPI baseApi = new TessBaseAPI();
baseApi.setDebug(true);
baseApi.init(MainActivity.DATA_PATH, MainActivity.lang);
baseApi.setPageSegMode(TessBaseAPI.PageSegMode.PSM_SINGLE_CHAR);
baseApi.setVariable("tessedit_char_whitelist","abcdefghijklmnopqrst");
baseApi.setVariable("save_blob_choices", "T");
baseApi.setImage(mainBitmap);
publishProgress(80);
mainBitmap.recycle();
mainBitmap = null;
// Iterate through the results.ResultIterator iterator =
baseApi.getResultIterator();String lastUTF8Text;float lastConfidence;
iterator.begin();do {
lastUTF8Text =
iterator.getUTF8Text(TessBaseAPI.PageIteratorLevel.RIL_SYMBOL);
lastConfidence =
iterator.confidence(TessBaseAPI.PageIteratorLevel.RIL_SYMBOL);
Log.i("string, intConfidence",lastUTF8Text+", "+lastConfidence);} while
(iterator.next(TessBaseAPI.PageIteratorLevel.RIL_SYMBOL));
baseApi.end();
Also as an extra question, is base.setDebug(true) supposed to work? Because
it doesn't seem to do anything.
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