I am trying to use an adaptative thresshold to binarize one image using the open cv library. The code is the following:
public Bitmap filter(Bitmap image){
Log.d(TAG, " Filtering ... ");
Mat inputMat = new Mat(image.getHeight(), image.getWidth(), CvType.CV_8U/*.CV_8UC1*/);
Utils.bitmapToMat(image, inputMat);
Mat inputMat2 = new Mat(image.getHeight(), image.getWidth(), CvType.CV_8U);
Mat outputMat = new Mat(image.getHeight(), image.getWidth(), CvType.CV_8U);
Log.d(TAG, " Pre Filtering ... ");
Imgproc.adaptiveThreshold(inputMat, outputMat, 50, Imgproc.ADAPTIVE_THRESH_MEAN_C, Imgproc.THRESH_BINARY, 5, 25);
// Photo.fastNlMeansDenoisingColored(inputMat, outputMat);
Log.d(TAG, " Filtering Done... ");
Bitmap output = Bitmap.createBitmap(image.getWidth(), image.getHeight(), Bitmap.Config.RGB_565);
Utils.matToBitmap(outputMat, output);
return output;
}
I had tried several types as CV_8UC1 or CV_8SC1, but all always cause the same error at executing the function:
05-16 00:50:33.125: E/AndroidRuntime(1892): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=102, result=-1, data=Intent { dat=content://media/external/images/media/15312 (has extras) }} to activity {com.medicasafe.images/com.medicasafe.images.ImageDecodingActivity}: CvException [org.opencv.core.CvException: cv::Exception: /home/reports/ci/slave_desktop/50-SDK/opencv/modules/imgproc/src/thresh.cpp:796: error: (-215) src.type() == CV_8UC1 in function void cv::adaptiveThreshold(cv::InputArray, cv::OutputArray, double, int, int, int, double)
The method is executed in onActivityResult() after the user select one image from gallery.
