Apple MB673Z/A User Manual - Page 460

To sharpen an image using the Edge Sharpen controls: 1 Select an image. 2 If the Edge Sharpen controls are not shown in the Adjustments inspector or the Adjustments pane of the Inspector HUD, choose Edge Sharpen from the Add Adjustments pop-up menu (or press Control-S). 3 Sharpen the image by doing one of the following: Use the Intensity slider and value slider to adjust the strength of the sharpening adjustment. Â Drag the Intensity slider to the right to increase the amount of sharpening applied to the image, and drag the Intensity slider back to the left to reduce it. 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 1.00 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 applied to the image. 4 Adjust the threshold for determining which pixels are edges and which ones are not by doing one of the following: Use the Edges slider and value slider to adjust the threshold of the sharpening adjustment. Â Drag the Edges slider to the right to increase the area over which the sharpening effect is applied, and drag the Edges slider back to the left to reduce it. Â Click the left or right arrow in the Edges value slider to adjust the area over which the sharpening effect is applied by 2 percent increments, or drag in the value field. Â Double-click the number in the Edges value slider, then enter a value from 0.00 to 1.00 and press Return. A value of 0.00 applies no sharpening adjustment to the image. A value greater than 0.00 increases the number of pixels that qualify as edges. Note: If you observe digital noise beginning to increase in flat areas of the image (areas with little or no contrast), decrease the Edges parameter setting. 460 Part III Performing Image Adjustments