OCR, placement of recognized text in camera view mode
I am trying to print recognized text on the camera screen. I am getting this error:
Cannot create a handler inside a thread that has not called Looper.prepare ()
I have done some research on this issue, but although I cannot rob it, probably due to luck of the experience (first time I try to build an application using openCV and tesseract, I am facing many errors that I have not seen before). careful. My piece of code where I want to use Toast is added below:
import android.content.Context;
import android.graphics.Bitmap;
import org.opencv.core.Mat;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;
import com.googlecode.tesseract.android.TessBaseAPI;
public class justOCR {
Bitmap bitmap;
protected Context context;
public justOCR(Context context){
this.context = context;
}
public static final String DATA_PATH = Environment
.getExternalStorageDirectory().toString() + "/sdcard/CameraTest/";
private static final String lang = null;
public void numPlateOCR(Mat plate){
bitmap=Bitmap.createBitmap(plate.width(), plate.height(), Bitmap.Config.ARGB_8888);
org.opencv.android.Utils.matToBitmap(plate, bitmap);
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
// Convert to ARGB_8888, required by tess
//byteArray = byteArray.copy(Bitmap.Config.ARGB_8888, true);
// _image.setImageBitmap( bitmap );
Log.v("baseApi", "Before baseApi");
TessBaseAPI baseApi = new TessBaseAPI();
baseApi.setDebug(true);
//baseApi.init(DATA_PATH, lang);
baseApi.init("/sdcard/CameraTest/", "eng");
baseApi.setVariable("tessedit_char_whitelist", "1234567890");
baseApi.setImage(bitmap);
String recognizedText = baseApi.getUTF8Text();
baseApi.end();
// You now have the text in recognizedText var, you can do anything with it.
// We will display a stripped out trimmed alpha-numeric version of it (if lang is eng)
// so that garbage doesn't make it to the display.
Log.v("NUMBER", "OCRED TEXT: " + recognizedText);
//if ( lang.equalsIgnoreCase("eng") ) {
// recognizedText = recognizedText.replaceAll("[^a-zA-Z0-9]+", " ");
//}
recognizedText = recognizedText.trim();
if ( recognizedText.length() != 0 ) {
//TODO print or save to xml//
Toast.makeText(this.context, "***"+recognizedText+"***", Toast.LENGTH_SHORT).show();
}
}
}
Thanks for any help.
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1 answer
You're trying to make Toast not on UIThread, another guy says.
But look, this is important to u: How to ask
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