Apple MB673Z/A User Manual - Page 463

III Â Click the left or right arrow in the Intensity value slider to adjust the sharpening by 2 percent increments, or drag in the value field. The left arrow decreases the sharpening effect on the image, and the right arrow increases it. Â Double-click the number in the Intensity value slider, then enter a value from 0.00 to 2.00 and press Return. A value of 0.00 applies no sharpening adjustment to the image. A value greater than 0.00 increases the sharpening adjustment to the image. 4 Adjust the area over which the sharpening adjustment is applied (the distance, in pixels, that Aperture goes from each pixel to evaluate sharpness) by doing one of the following: Â By default, the Radius slider is set to 1.00 pixels. Drag the Radius slider to the right to increase the area over which the sharpening effect is applied, 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 pixel distance by 2 percent increments, or drag in the value field. Â Double-click the number in the Radius value slider, then enter a value from 0.00 to 200.00 and press Return. A value of 0.00 applies no sharpening adjustment to the image. A value greater than 0.00 increases the area over which the sharpening adjustment is applied. As you change the parameter values, the image updates to display the sharpening effect. Working with the Vignette Controls You use the Vignette adjustment controls to apply a vignette to an image. The term vignette describes an image whose brightness fades to its periphery from its center. Vignettes are usually applied to an image after it is shot, for artistic effect. Aperture provides two types of vignettes: Exposure and Gamma. The Exposure vignette is designed to simulate a lens-created vignette. The Gamma vignette is designed for artistic effect and applies a gamma adjustment to the affected pixels within the vignette. Because the Gamma vignette intensifies the affected pixels, it creates a more pronounced vignette effect than the Exposure vignette. Note: You can add a vignette to any image cropped in Aperture. The adjustment is applied after the image is cropped. Chapter 15 Making Image Adjustments 463