Question abour AACO

[MurrayFoote]

The new Auto Adaptive Contrast Optimisation feature in AI Studio provides an easy way to enhance contrast. You can also modify contrast with curves, including the highlights and shadows sliders. Does AACO do anything that yoiu can't already do manually? Does it offer improved sensitivity or does it actually increase the tonal range?

Regards,
Murray

[LSI_Kratzenstein]

AACO prevents and enhance the colors in the dark tones, which you loose, when you are using the gradation curves. Also a precalculation is done, which results in images with more contrast on the edges.

kind regards

[MurrayFoote]

"AACO prevents and enhance the colors in the dark tones"

Is there a word missing here? OK, it enhances the colours in the dark tones but what does it prevent?

If it enhances the colours in the dark tones beyond what you can achieve with curves then does that mean that it does effectively increase the tonal range beyond what you can achieve by other methods?

If it also uses a precalculation which results in more contrast on the edges, is this similar to using an edge mask in Photoshop?

Regards,
Murray

[LSI_Kratzenstein]

With the Saturation Slider you could increase the saturation in the dark tones (corrected tones). With this you could "prevent" the colors. Parts, which are light up get at normal also more saturation natural. This does not happen with curves, not in the way AACO could do.
The precalculation do a local contrastextension by building a local histogram. This prevents the loose of contrast by adding a curve.

kind regards