Sharpen

Adaptive unsharp

Directional sharpen

High pass

Sharpen

Unsharp mask


You can sharpen images to increase contrast, enhance image edges, or reduce shading. Sharpening is usually done after adjusting the color and tone of an image and after resampling or resizing. For more information about sharpening images, see the Corel PHOTO-PAINT help.

Adaptive unsharp Back to Top

The Adaptive unsharp effect (Effects Sharpen Adaptive unsharp) lets you accentuate edge detail by analyzing the values of neighboring pixels. This filter preserves most image detail, but its effect is most apparent in high-resolution images.

 

Original

Adaptive unsharp

Directional sharpen Back to Top

The Directional sharpen effect (Effects Sharpen Directional sharpen) lets you enhance the edges of an image without creating a grainy effect.

 

Original

Directional sharpen

High pass Back to Top

The High pass effect (Effects Sharpen High pass) lets you remove image detail and shading to give an image a glowing quality by emphasizing its highlights and luminous areas. However, it can also affect the color and tone of the image.

 

Original

High pass

Sharpen Back to Top

The Sharpen effect (Effects Sharpen Sharpen) lets you accentuate the edges of the image by focusing blurred areas and increasing the contrast between neighboring pixels. Move the Edge level(%) slider to set the degree to which edge detail is accentuated. Threshold specifies how far apart adjacent tonal values have to be before the effect is applied. This is important to prevent smooth areas from becoming speckled. Low values produce a more exaggerated sharpening effect because fewer areas are excluded. Higher threshold values exclude areas of lower contrast. To prevent dramatic shifts in hue, enable Preserve colors.

 

Original

Sharpen

Unsharp mask Back to Top

The Unsharp mask effect (Effects Sharpen Unsharp mask) lets you accentuate edge detail and focus blurred areas in the image without removing low-frequency areas. Percentage sets the intensity of the sharpening effect. Radius sets the amount of pixels that are evaluated at once. Threshold sets how many pixels are affected.

 

Original

Unsharp mask

The features documented in the Help are available in the full version of CorelDRAW Graphics Suite 2019. Some features may not be available in this version of the product.


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