8.46. Reinhard 2005

8.46. Reinhard 2005
	8. The “Colors” Menu

8.46.1. Overview

Figure 16.234. “Reinhard 2005” tone mapping example

Original image

Filter applied with default settings, after changing image precision in GIMP to 32-bit floating point linear light.

This filter can be used to adapt an image, which may have a high dynamic range (HDR), for presentation using a low dynamic range. This is an efficient global operator derived from simple physiological observations, producing luminance within the range 0.0-1.0.

This tonemapping approach was originally presented by Reinhard, E. and Devlin, K. (2005). “Dynamic range reduction inspired by photoreceptor physiology.” In: IEEE Transactions on Visualization and Computer Graphics, 11(1) (2005), pp. 13–24.

	Note
	Although not as slow as the Fattal and Mantiuk filters, the Reinhard filter is not very fast on larger images. For finding the best settings for your image you could make a small relevant selection first and save that as a preset before using that for the whole image.

8.46.2. Activating the filter

This filter is found in the image window menu under Colors → Tone Mapping → Reinhard 2005.

8.46.3. Options

Figure 16.235. The “Reinhard 2005” filter Dialog

Presets: “Presets” are a common feature for several Colors commands. You can find its description in Section 8.1.1, “Colors Common Features”.
Brightness: Overall brightness of the image.
Chromatic adaptation: Adaptation to color variation across the image.
Light adaptation: Adaptation to light variation across the image.
Input Type, Clipping, Blending Options, Preview and Split view: These are common features described in Section 8.1.1, “Colors Common Features”.