I'm failing miserably at something I think it should be very easy to achieve. I'm importing a Bitmap from a .jpg file I have in drawable converting it to mat and then trying to change it to a grayscale image, converting it back to bitmap to display.
This is the code I use: package com.greven.test.contour; import org.opencv.android.Utils; import org.opencv.core.Mat; import org.opencv.imgproc.Imgproc; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.widget.ImageView; public class ContourTestActivity extends Activity { ImageView iv; Mat mMat, mAux; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); iv = (ImageView) findViewById(R.id.my_image); mMat = new Mat(); mAux = new Mat(); Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.squares); mMat = Utils.bitmapToMat(bmp); Imgproc.cvtColor(mMat, mAux, Imgproc.COLOR_RGB2GRAY, 0); Utils.matToBitmap(mMat, bmp); iv.setImageBitmap(bmp); } } I've tried with different space colors and I always get this error as long as I try to convert it to Gray. The error I get is this: 10-14 04:10:38.626: ERROR/AndroidRuntime(3343): Caused by: CvException [org.opencv.core.CvException: /home/andreyk/OpenCV2/trunk/ opencv_2.3.1.b2/modules/imgproc/src/color.cpp:2834: error: (-215) scn == 3 || scn == 4 in function void cv::cvtColor(const cv::_InputArray&, const cv::_OutputArray&, int, int). Anyone knows what am I doing wrong? Thank you. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en