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COMBb2
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Sharpen

Crisp up soft or blurry details

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COMBb2's Sharpen tool applies unsharp mask (USM) sharpening with adjustable amount and radius to crisp up soft or slightly blurry details. Perfect for restoring sharpness after resizing, as a finishing step after denoising, or for enhancing fine detail in product and macro photography. Runs entirely in your browser.

Common Use Cases

  • Post-resize sharpening
    Restore crispness after downscaling images for web or social media.
  • Post-denoise finishing
    Add back edge definition after noise removal has softened fine detail.
  • Product photography
    Enhance fine detail and textures in product shots for e-commerce.
  • Text and document clarity
    Sharpen scanned text and line art for better readability.
  • Landscape detail
    Enhance fine detail in nature, architecture, and landscape photography.

How It Works

Unsharp masking works by creating a blurred copy of the image, then amplifying the difference between the original and the blurred copy. This enhances edges and fine details. The "amount" slider controls how much sharpening is applied, while "radius" controls the size of the detail enhancement zone.

Why Privacy Matters Here

Whether you're sharpening client deliverables, product photos, or personal images, COMBb2 processes everything on your device. No uploads, no cloud processing, no third-party access to your images.

Frequently Asked Questions

What's the difference between Sharpen and Deblur?+
Sharpen enhances existing edge detail using unsharp masking - it makes edges crisper. Deblur uses an AI model to reconstruct detail that was lost to blur. Use Sharpen for mild softness and finishing touches; use Deblur for actual motion blur or camera shake.
How much sharpening is too much?+
Over-sharpening creates visible halos around edges and amplifies noise. Start with moderate settings (amount: 50-100%, radius: 1-2px) and increase gradually. The before/after preview helps you spot artifacts before committing.
Should I sharpen before or after other edits?+
Sharpen as the last step. The recommended order is: denoise → enhance → resize → sharpen. Sharpening before denoising amplifies noise, and sharpening before resizing may produce artifacts.
Does it work on text and line art?+
Yes. Sharpening is particularly effective on scanned text, logos, and line art, where crisper edges directly improve clarity. Use a small radius (0.5-1px) for text.
Are my images uploaded?+
No. Sharpening happens entirely in your browser. Your images never leave your device.

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