Sharpen Brush Tool

Settings

The following settings can be adjusted from the context toolbar:

• Width—the brush (stroke) size in pixels. Type directly in the text box or drag the pop-up slider to set the value.
• Opacity—how see through the brush is. Type directly in the text box or drag the pop-up slider to set the value.
• Flow—how fast the brush effect is applied (1% is very slow, 100% is immediate). Type directly in the text box or drag the pop-up slider to set the value.
• Hardness—how hard the edges of the brush are. The brush appears softer as the percentage decreases. Type directly in the text box or drag the pop-up slider to set the value.
• More—click to display the Brushes dialog to access advanced brush settings.
• Force pressure to control size—Click to control brush size with pressure if using a pressure-sensitive device. This overrides brush defaults.
• Stabiliser—enables stroke stabilisation using either a Rope stabiliser or Window stabiliser mode; the former drags the stroke end by a 'rope' to smooth the stroke but lets you introduce sharp corners at increasing rope Length (radius) values by redirecting the slackened rope; the latter will smooth the stroke by averaging sampled input positions within a Window whose size is configurable.
• Symmetry—when set to greater than 0, repeats the brush stroke around a number of axes (defined by the symmetry value). The centre axis point can be repositioned by click-dragging it.
• Mirror—with symmetry enabled, causes brush strokes to be mirrored along the X and Y axis.
• Lock—when checked, prevents the symmetry line from being moved.
• Mode—determines the sharpening effect to be applied. Select from the pop-up menu.

About the sharpening modes

The three modes available from the context toolbar have slightly different effects on the underlying pixels.

• Clarity—increases local contrast.
• Unsharp Mask—increases contrast of edge pixels.
• Harsh—increases contrast on all pixels.