Android Watershed OpenCV

Question

我的问题如何在Android Watershed OpenCv上计算图像中的对象？

Answer 1

Since you didn't tell us which line causes those problem, but i strongly assume you misused erode() and dilate().

You should pass 3rd parameter of each function with valid non-zero Matrix.(eg Kernel)

erode & dilate example

// You can change the size of kennel 
// if you want to change the range of erosion & dilation
Mat kelnel = Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(2,2));

Mat fg = new Mat(img.size(),CvType.CV_8U);
Imgproc.erode(threeChannel, fg, kelnel);

Mat bg = new Mat(img.size(),CvType.CV_8U);
Imgproc.dilate(threeChannel, bg, kelnel);