chapter  11
High dynamic range video and tone mapping
Pages 18

The ratio between the brightest and the darkest values that a camera can capture is called dynamic range, and most cameras take low dynamic range pictures, spanning only a few orders of magnitude. As a consequence, if the light coming from a scene to the camera is of high dynamic range, then using a short exposure time, the camera will render correctly the details in the brightest parts of the image, but it won’t be able to capture details in the dark regions. Conversely, using long exposures we are able to see the dark regions but the bright ones become flat white (overexposed or “burnt”). And there is no exposure value that works for both types of regions; see Figure 11.1 for an example.