Sharpen Image — Free, Adjustable
100% Private — files never leave your device
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Supports: JPG, PNG, WebP
Sharpen Blurry Images
Vizua's sharpening tool uses an unsharp mask convolution filter to enhance edges and bring out details in soft or slightly blurry images.
Tips
- Low intensity (1-3) — subtle enhancement, good for portraits
- Medium (4-6) — noticeable sharpening for landscapes and products
- High (7-10) — aggressive, may produce visible halos around edges
Frequently Asked Questions
How does image sharpening work?
Sharpening uses a convolution filter that enhances edges by increasing contrast between adjacent pixels. The unsharp mask technique subtracts a blurred version from the original to amplify fine details.
Can sharpening fix a very blurry photo?
Sharpening works best on slightly soft images. Severely blurry or motion-blurred photos may show artifacts (halos) at high intensity. For best results, start with low intensity and increase gradually.
Does sharpening increase file size?
Yes, slightly. Sharpening adds detail (higher frequency data), which compresses less efficiently. The increase is typically 5-15% for JPEG files.