Scalpel Add Precision Cuts

The scalpel tool allows you to manually adjust the clip on any image in spots where the edges are too faint or noisy for the red / green algorithm to handle gracefully.

View Example In Editor» The example edits are slightly different from the tutorial below.

How to Make a Cut

To add a cut, select the scalpel then click and drag in the image where you'd like your cut to be made. The same tool also lets you edit the cuts.

Make a cut that bridges the entire problematic section, then drag the curve at key points to follow the object contour. Click and drag anywhere on the curve to bend it.

Tip:

Use cuts sparingly. It is normally best to use the red/green marks for the bulk of the clipping, and then add a few choice cuts where there's poor contrast. It is rare that you'd want to add cuts along the entire outline.

Fine Tuning Scalpel Cuts

Extending A Cut

Click and drag in the extend zone to add another piece to the cut.

Original + Marks

original tutorial image w/ marks

Result

result tutorial image

Smooth vs Corner Points

Click on the blue smooth / corner button next to each point to switch between having a corner at that point, or having the curve continue smoothly.

Original + Marks

original tutorial image w/ marks

Result

result tutorial image

Original + Marks

original tutorial image w/ marks

Result

result tutorial image
Tip:

Double-click the node to toggle it.


Deleting Points

Click on the red x next to a point to delete it.

Original + Marks

original tutorial image w/ marks

Result

result tutorial image

Scalpel Pitfalls

Don't Cross The Cuts

Scalpel cuts that cross with themselves or other cuts will be gray and ignored. Move the cuts so that they don't actually cross to resolve the problem.

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Original + Marks

original tutorial image w/ marks

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Result

result tutorial image

Original + Marks

original tutorial image w/ marks

Result

result tutorial image

Pre-Crop


Your image size exceeds your active size limit. For best results, please crop the image to the portion you wish to clip.

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