OpenCV Android -计算一列Mat的平均值

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.Scalar;

public class MainActivity extends AppCompatActivity {

    static {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 加载图像数据
        Mat mat = new Mat();
        // 这里省略了加载图像数据的代码

        // 计算平均值
        Scalar mean = Core.mean(mat);

        // 输出平均值
        double[] values = mean.val;
        for (double value : values) {
            Log.d("Average", String.valueOf(value));
        }
    }
}