code: public static ImageReader getImageReaderFromHttpImage(final String sourceImageHttpURL)
              throws IOException {
  
          InputStream inputStream = new URL(sourceImageHttpURL).openConnection().getInputStream();
          return getImageReader(inputStream);
      }
docs: Get image reader from given web image.
  
  @param sourceImageHttpURL
  the web image object you want to handle.
  @return an image read object has given source image data.
  @throws IOException