libpng warning: Image width is zero in IHDR

Error:

Hello, OpenCV

Running DetectFaceDemo
Detected 0 faces
Writing faceDetection.png
libpng warning: Image width is zero in IHDR
libpng warning: Image height is zero in IHDR
libpng error: Invalid IHDR data

Solution:

Change the path of the files to their absolute paths.

	// Create a face detector from the cascade file in the resources
	// directory.
	//CascadeClassifier faceDetector = new CascadeClassifier(getClass().getResource("/lbpcascade_frontalface.xml").getPath());
	//Mat image = Highgui.imread(getClass().getResource("/lena.png").getPath());
	CascadeClassifier faceDetector = new CascadeClassifier("C:/Users/mizuki/workspace/HelloOpenCV/src/lbpcascade_frontalface.xml");
	Mat image = Highgui.imread("C:/Users/mizuki/workspace/HelloOpenCV/src/lena.png");

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