Image processing

In this section, we are going to describe how to process the received image in order to draw an image file on top of it. Now, a cascade classifier is run just as in the previous chapter. It is important to pay attention to the XML cascade file location. Throughout the code, we have used a helper function called getResourcePath, and we have used the convention of storing all the resources in the src/main/resources/ folder. This way, the helper function works in a manner similar to that of the following code:

private String getResourcePath(String path) {
  String absoluteFileName = getClass().getResource(path).getPath();
  absoluteFileName = absoluteFileName.replaceFirst("/", "");
  return absoluteFileName;
}

Using this function, one can load a cascade through the following call:

private void loadCascade() {
  String cascadePath = getResourcePath("/cascades/lbpcascade_frontalface.xml");
  faceDetector = new CascadeClassifier(cascadePath);
}

After the cascade has been correctly...