class ChessTracker extends Tracker
The ChessTracker class is used for image tracking algorithms based on
the idea of minimizing the difference between a sub-image of 'a' and a subsequent
displaced sub-image of 'b'.
This algorithm searches for improvements in displacement 'd' in multiple directions
and with multiple iterations.
It may be viewed as a form of Generating Set Search (GSS).
- See also
citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.112.8588&rep=rep1&type=pdf
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Instance Constructors
- new ChessTracker(a: MatriI, b: MatriI, w: VectoI, q: Boolean)
- a
the initial image
- b
the subsequent image
- w
the window size
- q
use false for Rook (4 directional) or true for Queen (8 directional) tracking
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- def err(dd: VectoI, x_r: Range, y_r: Range): Double
Return the value for the residual/error function that measures the difference between a sub-image of 'a' and a displaced sub-image of 'b'.
Return the value for the residual/error function that measures the difference between a sub-image of 'a' and a displaced sub-image of 'b'.
- dd
the displacement vector
- x_r
the range of x-coordinate values (e.g., 2, 3, 4)
- y_r
the range of y-coordinate values (e.g., 4, 5, 6)
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- Tracker
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- Tracker
- def linesearch(d: VectoI, dir: VectoI, x_r: Range, y_r: Range): (VectoI, Double)
Find an optimal displacement vector along the given direction 'dir'.
Find an optimal displacement vector along the given direction 'dir'.
- d
the current displacement vector
- dir
the current direction to search in
- x_r
the range of x-coordinates
- y_r
the range of y-coordinates
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- def optimize(u: VectoI): (VectoI, Double)
Find an optimal displacement vector 'd', so that points near 'u' in image 'a' match points near 'v = u + d' in image 'b', returning the vectors 'd' and 'v'.
Find an optimal displacement vector 'd', so that points near 'u' in image 'a' match points near 'v = u + d' in image 'b', returning the vectors 'd' and 'v'.
- u
the point in image 'a' for which a matching point 'v' is sought in 'b'
- Definition Classes
- ChessTracker → Tracker
- def outside(x: Int, y: Int): Boolean
Determine whether the point (x, y) is outside the image (e.g., x = -1).
Determine whether the point (x, y) is outside the image (e.g., x = -1).
- x
the x-coordinate/pixel position
- y
the y-coordinate/pixel position
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