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Sharpen
Sharpen More
Sharpen
The Sharpen filters let you apply or create special sharpening effects to your selected frame images. The Sharpen filters include None, Sharpen, Sharpen More, Edge Enhancement, and Unsharp Masking.
In using any of the sharpen filters, keep in mind that the image you obtain in the preview window may differ from the way the image appears when you finally scan it in. The appearance of the image in the preview window and how it is affected by a sharpen filter will depend on the resolution of the image. The higher the resolution, the less obvious the effect of certain filters.
The Sharpen filters increase the contrast of adjacent pixels, making images appear sharper and more focused.
Both Sharpen and Sharpen More filters improve clarity, with the Sharpen More filter having a stronger sharpening effect than the Sharpen filter.
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Sharpen |
Sharpen More |
The Edge Enhancement filter gives greater contrast to edges. The filter can do this because edges are areas in an image where gray or color levels change abruptly. It is best to use this tool for improving geometrical contoured shapes.
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Original |
Edge Enhancement |
The Unsharp Masking filter is used to adjust the contrast of edge detail, creating the illusion of more image sharpness. This filter can be useful for refocusing an image that has become blurry from interpolation or scanning, and it is an essential tool for doing CMYK color separation. In general, Unsharp Masking is needed to render sharp color reproductions, especially when you wish to make a large color reproduction from a small original.
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Unsharp Masking |
To adjust the contrast of edge, follow the steps below:
Choose Unsharp Masking to open its dialog box from the Sharpen options menu.
Enter a value in the Strength box to specify the degree of the filter’s effect. The higher the value, the stronger the effect of the filter.
Select a mask size in the Mask Size box. This parameter determines the depth of pixels that will be affected at the edge. Available selections are 3x3, 5x5, 7x7, 9x9, 11x11, and 13x13. For small, low-resolution image files, 3x3 is sufficient. For high-resolution, or large-scale image files, use 7x7.
Enter a value in the Threshold box. This option allows you to specify a tolerance range to prevent overall sharpening that might generate noise or cause other unexpected results. The Threshold defines the required contrast between adjacent pixels in an image before sharpening is applied to an edge. A lower value produces a clearer effect.
Click OK to apply the settings.
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