OpenCV(4.3.0): 错误: (-215:Assertion failed) !_src.empty() in function 'GaussianBlur'

如何解决OpenCV(4.3.0): 错误: (-215:Assertion failed) !_src.empty() in function 'GaussianBlur'

我是 OpenCV 的新手。我正在尝试对图像应用高斯滤波器。下面的 java 代码对一个图像工作正常，但对于我机器中相同或其他位置的所有其他图像，它会引发错误。

  static int width = 49;
  static int height = 49;

public static void gausianBlur(){

            try {
                long startTime = System.currentTimeMillis();
                nu.pattern.OpenCV.loadShared();

                File f = new File("/Users/shankysharma/Desktop/login.png");
                   System.out.println("is file exists?: " +  f.exists() + " path: " + f.getAbsolutePath());


                //Reading the Image from the file and storing it in to a Matrix object
                Mat src = Imgcodecs.imread(f.getAbsolutePath());
                //Creating an empty matrix to store the result
                //Mat dst = new Mat();
                Mat dst = new Mat(src.rows(),src.cols(),src.type());
                System.out.println(src + " rows: " + src.rows());
                Imgproc.GaussianBlur(src,dst,new Size(width,height),0);
                Imgcodecs.imwrite(gausian_output + "_" + width + "x" + height + ".png",dst);
                long endTme = System.currentTimeMillis();
                System.out.println("Image processed for gausian blur. Total time : " + (endTme-startTime) + " milliseconds");


            } catch (Exception e) {
                System.out.println("Error:" + e.getMessage());
            }
        }

输出：

is file exists?: true path: /Users/shankysharma/Desktop/login.png
Mat [ -1*-1*CV_8UC1,isCont=false,isSubmat=false,nativeObj=0x7fa6f9c16030,dataAddr=0x0 ] rows: 0
Error:cv::Exception: OpenCV(4.3.0) /Users/jason/Projects/openpnp/opencv/opencv/opencv-4.3.0/modules/imgproc/src/smooth.dispatch.cpp:606: error: (-215:Assertion Failed) !_src.empty() in function 'GaussianBlur'

我正在使用 opencv maven 库：

        <dependency>
            <groupId>org.openpnp</groupId>
            <artifactId>opencv</artifactId>
            <version>4.3.0-3</version>
        </dependency>

加载图像 (Mat src = Imgcodecs.imread(f.getAbsolutePath());) 时似乎存在问题，因为未创建 src 矩阵。但不确定根本原因是什么。我检查了图片的名称和位置，没问题。