Where does stitch collide?

In sports medicine a stitch (exercise-related transient abdominal pain) is the sharp, cramping pain felt in the side during running or other exertion. Morton and Callister's 2000 Characteristics and etiology of exercise-related transient abdominal pain characterised who gets it, where, and what provokes it, pointing to irritation of the peritoneum rather than, as once thought, the diaphragm. The referent is a transient exertional pain, unrelated to a loop of thread or a merged image.[1]

Unit

A transient exertional pain, rated by intensity and location

Recovery means

The stitch resolves on slowing or stopping; recovery is the pain subsiding as exertion drops

Measured by

By self-reported pain intensity, location, and frequency during exercise

In computer vision, image stitching is the process of aligning and blending overlapping photographs into a single seamless panorama. Brown and Lowe's 2007 Automatic panoramic image stitching using invariant features did this by matching invariant keypoints across images, solving for the geometry that relates them, and blending the seams. The referent is an image-registration-and-blending procedure, named by analogy to sewing but unrelated to thread or to a runner's pain.[2]

Unit

An alignment-and-blend operation over overlapping images

Recovery means

Not applicable

Measured by

By feature-match accuracy, registration (alignment) error, and seam or blend quality