Dynamic Photo HDR

Tone Mapping 39

4.2 Color Operations

While we are tone mapping we work with image data that have far greater dynamic range than normal

photo. It is therefore a great time to inject some regular image operators that would benefit from the

finer dynamic details without color clipping (as in normal image operation that works with limited

dynamic range).

Filter

This will set the output filter. To cycle between the available filters, press the Filter button:

The output filter can be: Color, Black/White, Black/White Heavy Sky, Black/White Hard Light and

Orton Effect

Orton Effect adds a "Dreamy look" to the image. See the comparison:

The settings bellow will all affect the currently selected filter.

Gamma

The first one is Gamma, that controls the shape of response curve from its initial linear state (where

gamma = 1.0). Moving the dial right will brighten mid-tones, moving the dial left will darken the mid-

tones. This is the best way to control the perception of the overall image brightness so it looks good on

the computer monitor.

Curves

An operator that adjust the response curve. Unlike gamma that changes the curve by logarithm, with

curves you can actually draw your own response curve.