unsharp masking

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un·sharp mask·ing

in radiography, superimposing a blurred negative of a radiograph to cancel large density differences, leaving fine detail more visible.
References in periodicals archive ?
Run the unsharp mask filter: Filter->Sharpen->Unsharp Mask.
Although resize options are available in Debabelizer, the program does not feature the "Sharpen" or "Unsharp Mask" filters necessary to ensure optimum crispness in resized images.
My next step is to sharpen the result a tiny bit using the Unsharp Mask filter (Filter > Sharpen > Unsharp Mask).
I achieved the best processing using a combination of unsharp mask and a few dozen iterations of Lucy-Richardson deconvolution.
Additionally, the software includes a full suite of post-processing tools, including RGB combine, digital development, Gaussian blur, deconvolution, unsharp mask, and wavelet sharpening routines.
For example, here's how to selectively apply unsharp masking (Filter > Sharpen > Unsharp Mask) to your image.
While there are many different ways to sharpen an image, mostly I prefer to use the Lasso tool with some feathering to select an area I wish to sharpen, and then apply the Unsharp Mask filter with a radius of 1 to 2 pixels.
I prefer this technique to Photoshop's Unsharp Mask because of the extended control RegiStax provides.
One important lesson I've learned after considerable experimentation is proper use of Adobe Photoshop's Unsharp Mask filter.
Once I'm happy with these results, I use the Unsharp Mask filter on the Luminosity layer, then flatten the image and save it as my final file.
I find the software's unsharp mask to be one of the best I've ever used.
In addition, you can apply some mild sharpening by clicking on Filter > Sharpen > Unsharp Mask, and tweaking both the Amount and Radius of the mask.