How to create sketch splines without any hassle

公伸_伴

Hello.  I would like to create contour lines from photographs and design calligraphy, etc. Is there a way to create sketch splines without any hassle?  please tell me.  I want to do something like contour extraction in the photo app.

shawn_crocker

Just click to add spline points after selecting the spline tool while editing a sketch?  I'm not sure how it could be easier?

公伸_伴

いくつもたくさんのスプラインポイントを追加するのではなく簡単に写真から輪郭線をワンボタンの一度の操作で自動的に作成したい。

Ste_Wilson

Translated above:

Instead of adding a multitude of spline points, I want to easily create outlines from photos with a single, single-button operation.

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I don't think there is a single button that can do this. It's going to manual choices and simplifying curves where you can I think.

An example might help? Someone might have a feature script.

jim_zamecnik

Some graphics software, things like Photoshop or Gimp, have something called "edge detection" that might help with something like this. But I haven't used those programs in years, and I have no idea how it might be implemented here.

martin_kopplow

@公伸_伴 Try inkscapes's tracing. It is free and will output a spline in an SVG or DXF file you can import to Onshape.

https://inkscape.org/doc/tutorials/tracing/tutorial-tracing.html

Affinity has someting sililar.