adobe photoshop - Technique for finding the centerline of a curved

I'm curious to know if anyone knows of any effective techniques for finding the center line of a curved object. In the screenshot below you'll see a crude version of what I mean. Is there any wa

adobe photoshop - Technique for finding the centerline of a curved

adobe photoshop - Technique for finding the centerline of a curved

Curved Shapes

adobe photoshop - Technique for finding the centerline of a curved

adobe photoshop - Technique for finding the centerline of a curved

adobe photoshop - Technique for finding the centerline of a curved

adobe photoshop - Technique for finding the centerline of a curved

adobe photoshop - Technique for finding the centerline of a curved