Can multiple shots help remove telephone wires from a still image?
Asked 9/5/2016
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I want to remove telephone wires from a scene by shooting several still images from slightly different vertical positions, so the wires fall in different places against the background. Is there a practical way to combine those images to reconstruct the scene without the wires? Are there any automated tools for this, or is Photoshop the best approach? If using Photoshop, what techniques work well for aligning and blending multiple images, and when is simple retouching a better option?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
9y ago
2 Answers
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If the background is sky, or is lighter than the wires, then stack your multiple images, align them and then for each wire you want to remove:
- with the image with the wire below and image without the wire above
- set layer blend mode to "lighten"
- that will show the top layer's lighter pixels in place of the wire
- mask as necessary
It may be tricky to align the layers in Photoshop, since the automatic alignment will no doubt use the wires as contrasty object to align, which you don't want, and each layer will have slight perspective changes.
The healing brush, using the content aware option, will remove wires pretty effectively from a single image. Might be worth a try before resorting to multiple images.
Here's a contrived example. Two copies of the same image, so perfectly aligned, with "wires" added in at different levels.
I layered the two images, and set the top blending mode to "Lighten" and the wire disappears. This could be done with simple masking, but this method avoids masking altogether if the background is consistently lighter than the wires.
Originally by user4191. Source · Licensed CC BY-SA 4.0
user4191
9y ago
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Yes, but it’s usually more of a manual retouching job than a fully automated process.
If the wire crosses a bright background like sky, a workable Photoshop method is to stack the images as layers, align them as carefully as possible, then put a “cleaner” layer above the one with the wire and use the Lighten blend mode. Because the wire is darker, lighter pixels from the upper layer can replace it. You’ll likely need masking, and alignment can be tricky because auto-align may lock onto the wires and slight viewpoint changes introduce perspective differences.
Before doing multi-image compositing, try single-image tools first. In Photoshop, the Healing Brush with content-aware behavior can remove wires very effectively, especially against simple backgrounds.
For straightforward wires, Clone Stamp is often the simplest solution, particularly when the wire is isolated. It becomes more time-consuming when the wire crosses detailed edges or complex subjects like trees.
So: multiple images can help, especially over simple bright backgrounds, but there’s no magic fully automatic method here. In many cases, healing or cloning on a single image is faster and easier.
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