Apple Aperture 3.5 - Manual (Page 336)

Chapter 7 Make image adjustments 336
Adjust sharpening applied during RAW decoding
1 Select a RAW photo.
Note: If the RAW Fine Tuning controls don’t appear in the Adjustments inspector or the
Adjustments pane of the Inspector HUD, the selected image is from a previous version of
Aperture. You must first reprocess the image using the most current RAW image processing. For
more information, see
Reprocess photos from earlier versions of Aperture on page 49.
2 Adjust the strength of the sharpening effect using the Sharpening slider and value slider.
Use the Sharpening slider and
value slider to adjust the strength
of the sharpening effect applied
during the RAW decoding process.
A value of 0.00 applies no sharpening effect to the image during the RAW decoding process. A
value greater than 0.00 increases the sharpening effect.
3 Adjust how the sharpening effect is applied to edges using the Edges slider and value slider.
Use the Edges slider and value
slider to adjust how the sharpening
effect is applied to the edges
during the RAW decoding process.
A value greater than 0.00 intensifies the sharpening effect on hard edges.
Use the Moire controls
Digital images often have color artifacts that appear around edges and lines because of noise
created by digital image sensors. Images whose subjects have linear patterns often introduce
a moire pattern that gives the subject a wrinkled or rainbow-colored appearance. In addition,
cameras with image sensors employing Bayer patterns often introduce noise into monochromatic
images. The Moire adjustment controls in the RAW Fine Tuning area of the Adjustments inspector
or the Adjustments pane of the Inspector HUD identify these patterns and correct these artifacts.
Because many digital cameras have weak anti-aliasing filters, the Moire and Radius parameters
are specifically used to correct aliasing in an image caused by edges with high color contrast.
Weak anti-aliasing filters tend to curve edges, skewing the colors in the process. During the RAW
decoding process, OS X scans for high-frequency information in the RAW file, looking for blended
colors, and then replaces the blended colors with the edge colors that originally existed in the
scene. The Moire parameter adjusts the amount of signal to apply the adjustment to. The Radius
parameter adjusts the pixel area (visual threshold) the adjustment is applied to.
Note: The Moire controls replace the Chroma Blur controls found in previous versions of Aperture.
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