Dcameraman wrote:When I am setting the HDR "window", where do I set it? If the actual "float" picture is wider than 0...255 then no matter where I put the "window" some portion will always be outside. Do I center the window on the image? or am I missing something?
Photomatix wrote:Tone Mapping algorithms vary from a simple gamma curve (which is often what cameras are doing when converting 12-bit RAW data to 8-bit JPEGs) to more complex operators commonly divided into two categories:
Â· Global operators: mapping depends on pixel's intensity and global image characteristics, but not on spatial location
Â· Local operators: mapping takes into account the pixels' surroundings (in addition to intensity and image characteristics).
The main advantage of global operators is fast processing. Local operators require longer processing times but they are better at producing a "good-looking" photograph (the human eye adapts to contrast locally). The Tone Mapping algorithm of Photomatix Pro belongs to the category of local operators
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