Line Suppression

The Smooth Sharpen | Line Suppression tool can be used to remove fine vertical and horizontal lines from an image.

Line Suppression Control & Use Summary:

Line Suppression Processing Example

Initial image with fine vertical lines.

Step 1)

The Feature Mask© tool is used to remove bright stars from the image since line suppression can effect stars.

The Spit Stars button on the Feature Mask tool is used to create the matching star only image.

Step 2)

Smooth Sharpen | Line Suppression is used to remove the fine vertical lines from the image without stars on the left. Notice the fine noise pattern in the dark background of the star image on the right. The next step will remove the fine noise pattern from the star image.

Step 3)

Smooth Sharpen | Smoothing & Noise Reduction is used to remove the fine background noise in the star image. Check the Max Apply box on Smoothing & Noise Reduction then left click on the fine background noise in the star image to set a luminance range where smoothing will be applied. Adjust the luminance Feather Range and Max Apply limit to remove the fine noise without smoothing star detail. See Smoothing With a Luminance Range for details.

Step 4)

Special Functions | Combine Images | Blend Modes, Opacity, & Masks with merge split blend mode set on the top layer and normal blend mode set on the bottom layer is used to merge the two processed images. Merge Split blend mode is lossless with ImagesPlus x64 on x64 Windows so no data is lost. Several tutorials for using Combine Images with 32 bit floating point layers, blend modes, opacity, and masks can be found at the main image processing tutorial page.

Step 5)

Image with vertical lines removed.

Copyright © November 18, 2013 MLUnsold Digital Imaging. All Rights Reserved.