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Here is my code to use grabcut on the android phone,But when finish the grabcut ,the background is black ,how to let it white,Thanks a lot! org.opencv.core.Rect rect1=new org.opencv.core.Rect(p1,p2) ; //Rect rect = new Rect(50,30, 100,200); Log.d(TAG, "rect: " + rect); Mat mask = new Mat(); mask.setTo(new Scalar(125)); Mat fgdModel = new Mat(); fgdModel.setTo(new Scalar(255, 255, 255)); Mat bgdModel = new Mat(); bgdModel.setTo(new Scalar(255, 255, 255)); Mat imgC3 = new Mat();
Imgproc.cvtColor(img, imgC3, Imgproc.COLOR_RGBA2RGB); Log.d(TAG, "imgC3: " + imgC3); Log.d(TAG, "Grabcut begins"); Imgproc.grabCut(imgC3, mask, rect1, bgdModel, fgdModel,5, Imgproc.GC_INIT_WITH_RECT); Mat source = new Mat(1, 1, CvType.CV_8U, new Scalar(3.0)); Core.compare(mask, source, mask, Core.CMP_EQ); // Core.compare(mask,cv::GC_PR_FGD,mask,Core.CMP_EQ); Mat foreground = new Mat(img.size(), CvType.CV_8UC3, new Scalar(255, 255, 255)); img.copyTo(foreground, mask);//提取完成 //convert to Bitmap Log.d(TAG, "Convert to Bitmap"); Utils.matToBitmap(foreground, bitmap); img.release(); imgC3.release(); mask.release(); fgdModel.release(); bgdModel.release(); return bitmap;

Here is my code to use grabcut on the android phone,But when finish the grabcut ,the background is black ,how to let it white,Thanks a lot! lot!

org.opencv.core.Rect rect1=new   org.opencv.core.Rect(p1,p2) ;
 //Rect rect = new Rect(50,30, 100,200);
 Log.d(TAG, "rect: " + rect);
 Mat mask = new Mat();
 mask.setTo(new Scalar(125));
 Mat fgdModel = new Mat();
 fgdModel.setTo(new Scalar(255, 255, 255));
 Mat bgdModel = new Mat();
 bgdModel.setTo(new Scalar(255, 255, 255));
 Mat imgC3 = new Mat(); 
   Imgproc.cvtColor(img, imgC3, Imgproc.COLOR_RGBA2RGB);
 Log.d(TAG, "imgC3: " + imgC3);
 Log.d(TAG, "Grabcut begins");
 Imgproc.grabCut(imgC3, mask, rect1, bgdModel, fgdModel,5, Imgproc.GC_INIT_WITH_RECT);
 Mat source = new Mat(1, 1, CvType.CV_8U, new Scalar(3.0));
 Core.compare(mask, source, mask, Core.CMP_EQ);
 //  Core.compare(mask,cv::GC_PR_FGD,mask,Core.CMP_EQ);
 Mat foreground = new Mat(img.size(), CvType.CV_8UC3, new Scalar(255, 255, 255));
 img.copyTo(foreground, mask);//提取完成
 //convert to Bitmap
 Log.d(TAG, "Convert to Bitmap");
 Utils.matToBitmap(foreground, bitmap);
 img.release();
 imgC3.release();
 mask.release();
 fgdModel.release();
 bgdModel.release();
 return bitmap;
bitmap;