public void Dispose()
{
APaint.Dispose();
ACanvas.Dispose();
Android.Runtime.JNIEnv.DeleteGlobalRef(jHost);
}
public void Dispose()
{
APaint.Dispose();
ACanvas.Dispose();
}
/// <summary>
/// Get OCR text and draw lines on original photo
/// </summary>
/// <param name="imageBytes"></param>
/// <param name="threshhold"></param>
private async void PerformOCR(byte[] imageBytes, double threshhold)
{
if (_api.Initialized)
{
string resultText = "";
var result = await _api.SetImage(imageBytes);
if (result)
{
resultText = _api.Text;
bitmapWithBoxes = bitmap.Copy(bitmap.GetConfig(), true);
Android.Graphics.Canvas canvas = new Android.Graphics.Canvas(bitmapWithBoxes);
Android.Graphics.Color color = Android.Graphics.Color.IndianRed;
Android.Graphics.Paint paint = new Android.Graphics.Paint();
paint.SetStyle(Android.Graphics.Paint.Style.Stroke);
paint.StrokeWidth = 2;
foreach (Tesseract.Result r in _api.Results(Tesseract.PageIteratorLevel.Textline))
{
if (r.Confidence > 50)
{
paint.Color = Android.Graphics.Color.GreenYellow;
}
else if (r.Confidence > 10)
{
paint.Color = Android.Graphics.Color.DarkOrange;
}
else
{
paint.Color = Android.Graphics.Color.DarkRed;
}
canvas.DrawRect(r.Box.X, r.Box.Y, r.Box.X + r.Box.Width, r.Box.Y + r.Box.Height, paint);
}
canvas.Dispose();
Android.Util.Log.Info("tesseract result", resultText);
PostProcessing pp = new PostProcessing();
pp.ProcessString(resultText);
_data = pp.processedList;
}
}
else
{
Toast.MakeText(this, "OCR not initialized.", ToastLength.Long).Show();
}
}
