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i want fisherface in android so i create subspaceProject code

protected Mat subspaceProject(Mat _W, Mat _mean, Mat _src){
    //contribute 폴더의 lda 에 있음
    Mat X = new Mat(_W.rows(), _W.cols(), _W.type());
    Mat Y = null;
    Mat w = _W.clone();
    Mat mean = _mean.clone();
    Mat src = _src.clone();
    // 샘플의 차원을 가져옴
    int n = src.rows();
    int d = src.cols();
    if(w.rows() != d){
        //System.out.println("Error W.rows != src.rows");
        Log.e(TAG, "Error W.rows != src.cols");
        return null;
    }
    Log.i(TAG, "w.row="+w.rows()+"cols="+w.cols()+"src.rows="+src.rows()+"cols="+src.cols());

    src.convertTo(X, w.type()); //error occure

    if(!mean.empty()){
        for(int i=0;i<n;i++){
            Mat r_i = X.row(i);
            Core.subtract(r_i, mean.reshape(1, 1), r_i);
        }
    }

    Core.gemm(X, w, 1.0, new Mat(), 0.0, Y);

    return Y;
}

and this is my log

i want fisherface in android so i create subspaceProject code

protected Mat subspaceProject(Mat _W, Mat _mean, Mat _src){
    //contribute 폴더의 lda 에 있음
    Mat X = new Mat(_W.rows(), _W.cols(), _W.type());
null;
    Mat Y = null;
    Mat w = _W.clone();
    Mat mean = _mean.clone();
    Mat src = _src.clone();
    // 샘플의 차원을 가져옴
    int n = src.rows();
    int d = src.cols();
    if(w.rows() != d){
        //System.out.println("Error W.rows != src.rows");
        Log.e(TAG, "Error W.rows != src.cols");
        return null;
    }
    Log.i(TAG, "w.row="+w.rows()+"cols="+w.cols()+"src.rows="+src.rows()+"cols="+src.cols());

    src.convertTo(X, w.type()); //error occure
w.type());

    if(!mean.empty()){
        for(int i=0;i<n;i++){
            Mat r_i = X.row(i);
            Core.subtract(r_i, mean.reshape(1, 1), r_i);
        }
    }

    Core.gemm(X, w, 1.0, new Mat(), 0.0, Y);

    return Y;
}

and this is my log