old_contents: ################################################################################
  #
  # Copyright (c) 2017, DbgVis - The Debugger Visualizer
  # Copyright (c) 2017, Peter Andreas Entschev
  # All rights reserved.
  #
  # BSD 3-Clause License
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # * Redistributions of source code must retain the above copyright notice, this
  #   list of conditions and the following disclaimer.
  #
  # * Redistributions in binary form must reproduce the above copyright notice,
  #   this list of conditions and the following disclaimer in the documentation
  #   and/or other materials provided with the distribution.
  #
  # * Neither the name of the copyright holder nor the names of its
  #   contributors may be used to endorse or promote products derived from
  #   this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  #
  ################################################################################
  
  import numpy as np
  import cv2
  
  class Visualizer(object):
      """Visualizer Factory"""
  
      def factory(type):
          if type == "opencv": return VisualizerCV()
          assert 0, "Wrong or not supported visualizer type: " + type
      factory = staticmethod(factory)
  
  class VisualizerCV():
      """OpenCV Visualizer"""
  
      def visualize(self, obj):
          cv2.imshow('image', obj)
          k = cv2.waitKey(0)
  
          # ESC key closes window
          if k == 27:
              cv2.destroyAllWindows()
  
new_contents: ################################################################################
  #
  # Copyright (c) 2017, DbgVis - The Debugger Visualizer
  # Copyright (c) 2017, Peter Andreas Entschev
  # All rights reserved.
  #
  # BSD 3-Clause License
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # * Redistributions of source code must retain the above copyright notice, this
  #   list of conditions and the following disclaimer.
  #
  # * Redistributions in binary form must reproduce the above copyright notice,
  #   this list of conditions and the following disclaimer in the documentation
  #   and/or other materials provided with the distribution.
  #
  # * Neither the name of the copyright holder nor the names of its
  #   contributors may be used to endorse or promote products derived from
  #   this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  #
  ################################################################################
  
  import numpy as np
  import cv2
  
  class Visualizer(object):
      """Visualizer Factory"""
  
      def factory(type):
          if type == "opencv": return VisualizerCV()
          assert 0, "Wrong or not supported visualizer type: " + type
      factory = staticmethod(factory)
  
  class VisualizerCV():
      """OpenCV Visualizer"""
  
      def passFunc(i, v):
          pass
  
      def visualize(self, obj):
          cv2.namedWindow('image')
  
          normalizeSwitch = 'Normalize Output:\n0 = OFF, 1 = ON'
          cv2.createTrackbar(normalizeSwitch, 'image', 0, 1, self.passFunc)
  
          while(True):
              normalize = cv2.getTrackbarPos(normalizeSwitch, 'image')
  
              if (normalize):
                  diff = obj.max() - obj.min()
                  adjustedObj = np.uint8(((obj - obj.min()) / diff) * 255)
              else:
                  adjustedObj = obj
  
              cv2.imshow('image', adjustedObj)
              k = cv2.waitKey(1)
  
              # ESC key closes window
              if k == 27:
                  break
  
          cv2.destroyAllWindows()
  
subject: Allow image to be normalized in OpenCV visualizer