How to Sharpen Filters in Photoshop
These filters are used to increase apparent sharpness.
Sharpen and Sharpen Mode
Digitally, it is possible to sharpen images (or at least make them appear sharper) by increasing edge contrast. Experiment with the Sharpen or Sharpen More filters, but be careful not to take it too far as the edges will start to glow.
Unsharp Mask
None of the Sharpen filters can do anything for a photograph that is out of focus, but they can certainly improve the clarity of one that is slightly soft. this is often necessary for scanned images. For finer control, use the Unsharp Mask, but again with caution. It has three main colors: amount, radius, and threshold.
Amount
When "sharpening" takes place, it occurs by increasing pixel contrast, which is controlled by the Amount slider. Usually, a value of 100 percent or more is required.
Radius
This refers to the number of pixels around the edge area that are being sharpened. A lower number will only sharpen edge pixels, while a higher number will sharpen a broader area.
Threshold
This amount determines how far apart of pixels must be from each other to be considered as separate areas to be sharpened.
Sharpen and Sharpen Mode
Digitally, it is possible to sharpen images (or at least make them appear sharper) by increasing edge contrast. Experiment with the Sharpen or Sharpen More filters, but be careful not to take it too far as the edges will start to glow.
Unsharp Mask
None of the Sharpen filters can do anything for a photograph that is out of focus, but they can certainly improve the clarity of one that is slightly soft. this is often necessary for scanned images. For finer control, use the Unsharp Mask, but again with caution. It has three main colors: amount, radius, and threshold.
Amount
When "sharpening" takes place, it occurs by increasing pixel contrast, which is controlled by the Amount slider. Usually, a value of 100 percent or more is required.
Radius
This refers to the number of pixels around the edge area that are being sharpened. A lower number will only sharpen edge pixels, while a higher number will sharpen a broader area.
Threshold
This amount determines how far apart of pixels must be from each other to be considered as separate areas to be sharpened.