  In this lecture note, we describe high dynamic range (HDR) imaging systems;
such systems are able to represent luminances of much larger brightness and,
typically, also a larger range of colors than conventional standard dynamic
range (SDR) imaging systems. The larger luminance range greatly improve the
overall quality of visual content, making it appears much more realistic and
appealing to observers. HDR is one of the key technologies of the future
imaging pipeline, which will change the way the digital visual content is
represented and manipulated today.
