HIGH DYNAMIC RANGE IMAGING SYSTEMS

摘要

A method for tone mapping a high dynamic range image to be presented on a display device (15). The display device is provided with a camera (17) which captures an image indicating ambient light levels experienced at a number of positions over the display (16) of the device. A data processing module (22) processes signals from the camera and generates data which is used in adapting a tone mapping function applied to the high dynamic range image so as to account for different ambient light conditions. The data processing module may take into account different lighting conditions at different positions on the display when generating the data which is used in adapting the tone mapping function. The data processing module may also use signals from a camera (20) on the other side of the device and / or from an orientation detection module (21). The data processing module may also use preference data supplied for a series of video frames, when adapting the tone mapping function. The device may be a mobile phone, a table computing device or a portable computer.