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Chapter 6: Edit Mode

Using the Advanced tab

Sliders

The Advanced tab has two sliders for brightening and two for darkening. The

Brightening and Darkening sliders control the shape of the adjustment curves,

while the Amplitude sliders control the height of the curves.

The more you brighten or darken, the more you increase the balance of the dark

against the light areas in the image. The Amplitude sliders increase the intensity of

the effects of brightening or darkening.

The Scale slider at the bottom of the tool adjusts the overall adjustment sensitivity to

local variation in brightness. Moving this slider to the left makes the adjustment more

sensitive to smaller areas of brightness variation, which may be beneficial in some

images. For most images, however, leaving the slider in the default position gives the

best result. You can also adjust the Contrast slider to decrease or increase contrast,

or use the Fill Light slider to lighten dark areas of the image.

Graphs

Between the Brightening and Darkening controls are two gray graphs that indicate the maximum amount of lightening or darkening

that you can apply before clipping (shown as bright pink) begins.

Two colored curves appear and change as you drag the Brightening, Darkening and Amplitude sliders - these curves indicate the

amount of brightening and darkening applied throughout the tonal range of the image. Darker tonal areas are on the left, and

brighter tonal areas are on the right. As you move your cursor over the image, a vertical line in the graph indicates the tone level of

the area under the cursor within the tonal range. At times there are two lines because the tone levels for brightening and darkening

are not necessarily the same. This is because brightening is sensitive to maximum color values while darkening is sensitive to

minimum color values.

The Advanced tab is unique in that you can adjust the curves manually, either on the graph itself, or on the actual photo.

Adjustments made on the photo are reflected in the curve on the graph. Adjustments made on the graph are reflected on the photo.

To increase contrast within a tonal range without changing the brightness, apply brightening and darkening simultaneously in

equal amounts by dragging the upper and lower curves up and down, respectively. The area between the top of the upper graph

and the bottom of the lower graph indicates the amount by which contrast is increased.

To use the Advanced tab:

1. Do one of the following:

Drag the Brightening or Darkening sliders to adjust the bright or dark pixels. As you drag, a gray curve appears

to indicate your adjustments.

Left-click and drag upwards to brighten the dark areas of the photo. Try to prevent clipping (shown in pink on the

graph).

Right-click and drag downwards to darken the bright areas of the photo. Try to prevent clipping (shown in pink on

the graph).

Drag the Scale slider to the right to make your adjustments more sensitive to smaller areas of brightness variation.

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ACDSee Pro 6 Guía de usuario Pagina 294