Optimization Algorithms

クラス
class	cv::MinProblemSolver
	Basic interface for all solvers [詳解]
class	cv::DownhillSolver
	This class is used to perform the non-linear non-constrained minimization of a function, [詳解]
class	cv::ConjGradSolver
	This class is used to perform the non-linear non-constrained minimization of a function with known gradient, [詳解]

列挙型
enum	cv::SolveLPResult { cv::SOLVELP_UNBOUNDED = -2 , cv::SOLVELP_UNFEASIBLE = -1 , cv::SOLVELP_SINGLE = 0 , cv::SOLVELP_MULTI = 1 }
	return codes for cv::solveLP() function [詳解]

関数
CV_EXPORTS_W int	cv::solveLP (InputArray Func, InputArray Constr, OutputArray z)
	Solve given (non-integer) linear programming problem using the Simplex Algorithm (Simplex Method). [詳解]

詳解

The algorithms in this section minimize or maximize function value within specified constraints or without any constraints.

列挙型詳解

SolveLPResult

enum cv::SolveLPResult

return codes for cv::solveLP() function

列挙値
SOLVELP_UNBOUNDED	problem is unbounded (target function can achieve arbitrary high values)
SOLVELP_UNFEASIBLE	problem is unfeasible (there are no points that satisfy all the constraints imposed)
SOLVELP_SINGLE	there is only one maximum for target function
SOLVELP_MULTI	there are multiple maxima for target function - the arbitrary one is returned

関数詳解

solveLP()

CV_EXPORTS_W int cv::solveLP	(	InputArray	Func,
		InputArray	Constr,
		OutputArray	z
	)

Solve given (non-integer) linear programming problem using the Simplex Algorithm (Simplex Method).

What we mean here by "linear programming problem" (or LP problem, for short) can be formulated as:

Where is fixed 1-by-n row-vector, is fixed m-by-n matrix, is fixed m-by-1 column vector and is an arbitrary n-by-1 column vector, which satisfies the constraints.

Simplex algorithm is one of many algorithms that are designed to handle this sort of problems efficiently. Although it is not optimal in theoretical sense (there exist algorithms that can solve any problem written as above in polynomial time, while simplex method degenerates to exponential time for some special cases), it is well-studied, easy to implement and is shown to work well for real-life purposes.

The particular implementation is taken almost verbatim from Introduction to Algorithms, third edition by T. H. Cormen, C. E. Leiserson, R. L. Rivest and Clifford Stein. In particular, the Bland's rule http://en.wikipedia.org/wiki/Bland%27s_rule is used to prevent cycling.

引数

Func	This row-vector corresponds to in the LP problem formulation (see above). It should contain 32- or 64-bit floating point numbers. As a convenience, column-vector may be also submitted, in the latter case it is understood to correspond to .
Constr	m-by-n+1 matrix, whose rightmost column corresponds to in formulation above and the remaining to . It should contain 32- or 64-bit floating point numbers.
z	The solution will be returned here as a column-vector - it corresponds to in the formulation above. It will contain 64-bit floating point numbers.

戻り値

One of cv::SolveLPResult