Apple MB673Z/A User Manual - Page 359
Using the Chroma Blur Controls from Aperture1.1
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III Using the Chroma Blur Controls from Aperture 1.1 In previous versions of Aperture, the RAW Fine Tuning controls had a Chroma Blur adjustment that corrected color artifacts that appear in digital images because of noise created by digital image sensors. The Moire controls in Aperture 2 replace the Chroma Blur controls. The Chroma Blur adjustment controls slightly smear the color to correct color artifacts that often occur in images shot at high ISO speeds. The Mac OS characterizes each digital camera's RAW file format to determine the appropriate chroma blur value. When you select the Chroma Blur checkbox in the Adjustments inspector or the Adjustments pane of the Inspector HUD, this default chroma blur adjustment is turned off, allowing you to set your own chroma blur value. To adjust the Chroma Blur parameter: 1 Select a RAW image imported with or migrated to Aperture 1.1. The version is indicated by the RAW Decode Version pop-up menu. 2 In the Adjustments inspector or the Adjustments pane of the Inspector HUD, select the Chroma Blur checkbox. Select the Chroma Blur checkbox to modify the Chroma Blur RAW decoding settings. 3 Adjust the area over which the chroma blur effect is applied by doing one of the following: Use the Radius slider and value slider to adjust the area over which the chroma blur effect is applied during the RAW decoding process. Â The default value for the Radius slider and value slider is determined by the camera used to create the RAW image file. Drag the Radius slider to the right to increase the radius of the area over which the chroma blur effect is applied during the RAW decoding process, and drag the Radius slider back to the left to reduce it. Â Click the left or right arrow in the Radius value slider to adjust the radius by increments of one-tenth of a pixel, or drag in the value field. Â Double-click the number in the Radius value slider, then enter a value from 0.10 to 10.00 and press Return. A value of 0.10 applies the least amount of chroma blur during the RAW decoding process. A value greater than 0.10 increases the chroma blur effect during the RAW decoding process. Chapter 14 An Overview of Image Adjustments 359
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