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Auto picking

Currently there is a single auto-picking mechanism in Hyperview. The user selects a series of control points. These points are honored and then the algorithm attempts to fill in between the selected points. The user then has the ability to add in additional control points and re-pick, or delete the auto-pick points entirely.

The method is a modified version of the Viterbi algorithm described in Clapp (2008). This is a purely 2-D picking scheme. Hyperview loops through all of the currently displayed views. For each view it finds all of the points in the current active pick color. These picks are used as control points, and the Viterbi algorithm attempts to find a smooth path between these points. By looking for large amplitudes between the picks (semblance) or finding the path with peaks in local correlation (reflectors).

An additional auto-picking sub-menu is Lloyd. The Lloyd's algorithm approach, described in Clapp (2008), is an attempt to make QCing easier. It takes a set of picked points and tries to find a reduced set of points which contains virtually the same information. The Lloyd's approach is currently a 2-D operation. It attempts to throw away points which are nearly linear combinations of neighboring points.


next up previous [pdf]

Next: Keyboard shortcuts Up: Menus Previous: Clipping

2009-04-13