Android OpenCV图像转换

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1.Mat存储到本地：

 public void saveMatData(Mat mat) {

        File fileDir = new File(Environment.getExternalStoragePublicDirectory(

                Environment.DIRECTORY_PICTURES), "mybook");

        if (!fileDir.exists()) {

            fileDir.mkdirs();

        }

        String name = String.valueOf(System.currentTimeMillis()) + "_book.jpg";

        File tempFile = new File(fileDir.getAbsoluteFile() + File.separator, name);

        Imgproc.cvtColor(mat, mat,Imgproc.COLOR_RGB2BGR);//保存到本地的颜色值，如果不转换默认是红色值，因为Mat默认是BGR格式

        Imgcodecs.imwrite(tempFile.getAbsolutePath(), mat);

        Log.e("存储", "FielSaveMatData" + tempFile.getPath());

  }

public void saveMatData(Mat mat) {

        File fileDir = new File(Environment.getExternalStoragePublicDirectory(

                Environment.DIRECTORY_PICTURES), "mybook");

        if (!fileDir.exists()) {

            fileDir.mkdirs();

        }

        String name = String.valueOf(System.currentTimeMillis()) + "_book.jpg";

        File tempFile = new File(fileDir.getAbsoluteFile() + File.separator, name);

        Mat dst = new Mat(mat.rows(), mat.cols(), CvType.CV_8UC4);    //新建目标输出图像

        Imgproc.cvtColor(mat, dst, Imgproc.COLOR_RGB2BGR);

        Imgcodecs.imwrite(tempFile.getAbsolutePath(), dst);

        Log.e("存储", "FielSaveMatData" + tempFile.getPath());

    }