User Guide

ACDSee Pro 2.5 - User Guide
136
Exposure options
It is extremely useful to have both the Exposure Warning and Histogram
preview open while you are adjusting exposure.
Exposure
=+0.00 eV
Applies exposure compensation to the image. One eV is equivalent to one
stop of exposure change.
Highlight
Recovery
Drag the slider to the right to darken and compress highlight details into a
smaller range, recovering overexposed highlight detail. Shadow and
midtone detail are relatively unchanged, allowing you to recover up to 2 eV
stops of lost highlight details.
Use the Highlight Recovery slider when the main subject of the image is
exposed well but you desire more highlight detail.
Contrast Drag the slider to adjust the midtone contrast of the image.
Fill Light Drag the slider to the right to brighten the image without clipping highlight
detail. A tone curve is applied, which expands the shadow tone range while
compressing the highlight tone range. Brightness is increased primarily in
the darker areas of the image, while contrast is reduced primarily in the
brighter areas of the image.
Local
Brightening
Drag the slider to the right to adaptively brighten the image. Darker areas
of the image will be brightened more than bright areas, allowing the image
to be brightened while minimizing loss of contrast, saturation, and highlight
detail.
Local
Darkening
Drag the slider to the right to adaptively darken the image. Brighter areas
of the image will be darkened more than bright areas, allowing the image to
be darkened while minimizing loss of contrast, saturation, and shadow
detail.
Channel Specifies the brightness or color channel you want to adjust.
For any channel, you can drag the curve in the histogram to adjust it
manually. Click on the curve to create handles that you can slide along the
curve. The yellow line indicates the original curve before adjustments.
Preprocess
Exposure
Select this option and click Reset, if you want to use the levels and curves
that were applied during preprocessing, and make further changes to those
levels and curves. Clear this option if you do not want to use the levels and
curves that were applied during preprocessing and would prefer, instead, to
select completely new levels and curves. Adjusting exposure options can be
very time-consuming, however, so the Preprocess Exposure option is
selected by default and it is recommended that you use the levels and
curves that were applied during preprocessing as a starting point for further
adjustments.
(This option is considered suitable only for advanced users.)