Differential D1044 Diff 3315 manual/composite_nodes/types/color/tone_map.rst

Changeset View

Standalone View


				********
				Tone Map
				********

				Tone mapping is a technique used in image processing and computer graphics to map one set of
				colors to another in order to approximate the appearance of high dynamic range images in a
				medium that has a more limited dynamic range.

				Essentially,
				tone mapping addresses the problem of strong contrast reduction from the scene values
				(radiance) to the displayable range while preserving the image details and color appearance
				important to appreciate the original scene content.

				The Tone Map node has two methods of calculation:

				Rh Simple
				Key
				The value the average luminance is mapped to.
				Offset
				Normally always 1, but can be used as an extra control to alter the brightness curve
				Gamma
				If not used, set to 1

				R/D Photoreceptor
				Intensity
				If less than zero, darkens image; otherwise, makes it brighter
				Contrast
				Set to 0 to use estimate from input image
				Adaptation
				If 0, global; if 1, based on pixel intensity
				Color Correction
				If 0, same for all channels; if 1, each independent