Sharpen

The Sharpen tool improves the clarity of an image by increasing the color contrast between pixels. To quickly access this tool and switch between the Blur, Sharpen, and Smudge tools press R.

The tool's parameters will be shown in a floating box over an image (by right-clicking the mouse) and also in the Settings Panel.

To change a parameter enter a numerical value in the parameter's field and press Enter (Mac: Return) or adjust the slider.

• Size (1-500). Sharpen tool size (in pixels).
• Hardness (0-100). The width of the tool's outer edge, where sharpness is partially applied. At higher values the amount of sharpness applied to the inner area of the tool increases.

Hardness = 30%	Hardness = 95%

• Amount (1-250). The amount of contrast between pixels. At a value of 100% contrast is increased 2 times, at 200% by 4 times, etc.

Changing Sharpness By Adjusting Contrast
Amount = 20%	Amount = 210%

• Radius (0.1-20.0). The degree of edge sharpness. This parameter specifies the number of neighboring pixels that are affected by the sharpness of a pixel. When the value is increased, the intensity of transition between colors increases.

Increasing Clarity by Adjusting the Amount of Edge Sharpness
Radius = 3.0	Radius = 18.0

To enhance sharpness along a straight line, select a starting point with the left mouse button, then, while keeping Shift pressed, move the cursor to the end point and release Shift. If Shift is not released, a new line will be drawn each time the mouse is clicked over the image.