DxO Nik Collection’s Dfine is a powerful Photoshop plug-in designed specifically to fix digital noise and grain while carefully preserving fine details. Unlike generic blur tools, Dfine splits noise into two distinct types: Luminance noise (the rough, sand-like grain) and Chrominance noise (unwanted color artifacts).
Here is the step-by-step workflow to clean up your grainy photos using Dfine directly inside Photoshop: 1. Preparation in Photoshop
Duplicate your layer: Always work non-destructively. Press Ctrl + J (Windows) or Cmd + J (Mac) to create a copy of your image.
Convert to a Smart Object: Right-click the new layer and select Convert to Smart Object. This ensures you can re-edit your Dfine settings at any time.
Launch Dfine: Go to the top menu and select Filter > Nik Collection > Dfine. 2. The Measure Step (Profiling the Grain)
When Dfine opens, it starts in Measure Mode to analyze how the sensor grain is distributed across the image.
Automatic Profile: By default, Dfine automatically scans the image and places target boxes over flat, detailed-less areas to measure the grain. For 90% of photos, this automatic profile is highly accurate.
Manual Profile: If the image has complex lighting and the automatic mode misses the grain, switch the method to Manual. Click Configure, and manually draw 3 to 4 small square boxes over areas where the grain is most prominent (like shadows or flat skies). Click Measure Noise. 3. The Reduce Step (Fine-Tuning the Fix)
Once the profile is loaded, click the Reduce tab in the right sidebar. Zoom your preview window to 100% (Actual Pixels) so you can accurately see the details. Reducing grain in detailed landscape – Adobe Community
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