User Manual

Image Broadway 6 Help

Image Adjustments > Reduce Noise and Sharpen Image > Unsharp Mask

Unsharp Mask

Unsharp mask is one of the commands you can use to sharpen all or part of a photo or image. It works by performing

a reverse or negative blurring operation. At the edge between two colors, unsharp mask will make the light color

lighter and the dark color darker, which is the opposite of blurring, based on the amount (percentage of difference

between the original and the filtered image) that you entered in the Unsharp Mask dialog. If you set the amount high,

you may loose some fine details in your photo.

Choose the Filter > Sharpen > Unsharp Mask menu item to apply the unsharp mask operation to the active item or to

the selected area to sharpen it. The unsharp mask filter creates a Gaussian blur filter with a defined radius (the

number of neighboring pixels to be included) to be included in the convolution. Then, it adds the amount you entered

back into the image to those pixels with the difference between them above the threshold.

Check off Preview to see what the change will look like.