Remove Moire on Scans with AKVIS Noise Buster
 

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Tutorial: AKVIS Noise Buster

Remove Moire on Scans

 

Images in print media represent a series of overlapping dots that should create an illusion of more colors. When you scan such a photo you can usually discover a moire pattern. A moire pattern results from incorrect screen angles of overprinting halftones.

You can try to avoid moire at the scanning stage. Sometimes a well-chosen scan angle can produce a remarkable effect. However, if you deal with a scanned image you have only one method of the moire suppression at your disposal - apply image processing techniques.

Original scan image Result: moire was removed
Original Image Result

On the photo below you can see a scan of a music CD cover. Moire is visible.

Fragment of a scanned CD cover with moire

Open this fragment of the scanned cover in AKVIS Noise Buster with the button.

Noise Buster will process the image using the Automatic Filtering preset from the list of presets. The program will analyse the noise on the whole image, create histograms for the noise, and offer settings for the parameters Noise Level and Smooth Level for every noise type.

The result of automatic filtration

In this case, when the noise is not regularly spread over the surface but represents visible squares, it's better to increase the value of the parameter Smooth Level (luminance noise).

Increase the value of the parameter Smooth Level

If the result in the preview area is good, press the button to apply the filtering to the whole image. Then save the image by pressing the button.

The cover fragment: the moire is removed
 
How It Works How It Works
   — Workspace — Workspace
   — Using the Program — Using the Program
   — Effect Parameters — Effect Parameters
   — Batch Processing — Batch Processing
   — Preferences — Preferences
Examples Examples
   — Cover Girl — Cover Girl
   — Remove Moire on Scans — Remove Moire on Scans
   — Reduce Noise on a Studio Photo — Reduce Noise on a Studio Photo
   — Color Noise Suppression — Color Noise Suppression
   — ISO and Noise — ISO and Noise
   — Suppress Noise on a Rendered Image — Suppress Noise on a Rendered Image
   — Noise Reduction on a Corrected Photo — Noise Reduction on a Corrected Photo
   — Improve a Dark Photo + Remove Noise — Improve a Dark Photo + Remove Noise
   — Make Your Photo Look Better — Make Your Photo Look Better
   — Remove JPEG-Artifacts — Remove JPEG-Artifacts
   — Lightening Dark Photos — Lightening Dark Photos

 

Noise Buster v. 10.2 - Free 10-day Trial    Download

 

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