详细描述
DiceKernelNormalizer performs kernel normalization inspired by the Dice coefficient (see http://en.wikipedia.org/wiki/Dice's_coefficient).
![\[ k'({\bf x},{\bf x'}) = \frac{2k({\bf x},{\bf x'})}{k({\bf x},{\bf x})+k({\bf x'},{\bf x'}} \]](form_86.png)
在文件DiceKernelNormalizer.h第26行定义。
公有成员 | |
| CDiceKernelNormalizer (bool use_opt_diag=false) | |
| virtual | ~CDiceKernelNormalizer () |
| virtual bool | init (CKernel *k) |
| virtual float64_t | normalize (float64_t value, int32_t idx_lhs, int32_t idx_rhs) |
| virtual float64_t | normalize_lhs (float64_t value, int32_t idx_lhs) |
| virtual float64_t | normalize_rhs (float64_t value, int32_t idx_rhs) |
| bool | alloc_and_compute_diag (CKernel *k, float64_t *&v, int32_t num) |
保护属性 | |
| float64_t * | diag_lhs |
| float64_t * | diag_rhs |
| bool | use_optimized_diagonal_computation |
构造及析构函数文档
| CDiceKernelNormalizer | ( | bool | use_opt_diag = false |
) |
default constructor
- 参数:
-
use_opt_diag - some kernels support faster diagonal compuation via compute_diag(idx), this flag enables this
在文件DiceKernelNormalizer.h第33行定义。
| virtual ~CDiceKernelNormalizer | ( | ) | [virtual] |
default destructor
在文件DiceKernelNormalizer.h第39行定义。
成员函数文档
alloc and compute the vector containing the square root of the diagonal elements of this kernel.
在文件DiceKernelNormalizer.h第109行定义。
| virtual bool init | ( | CKernel * | k | ) | [virtual] |
normalize the kernel value
- 参数:
-
value kernel value idx_lhs index of left hand side vector idx_rhs index of right hand side vector
在文件DiceKernelNormalizer.h第77行定义。
normalize only the left hand side vector
- 参数:
-
value value of a component of the left hand side feature vector idx_lhs index of left hand side vector
在文件DiceKernelNormalizer.h第88行定义。
normalize only the right hand side vector
- 参数:
-
value value of a component of the right hand side feature vector idx_rhs index of right hand side vector
在文件DiceKernelNormalizer.h第98行定义。
成员数据文档
diagonal left-hand side
在文件DiceKernelNormalizer.h第135行定义。
diagonal right-hand side
在文件DiceKernelNormalizer.h第137行定义。
bool use_optimized_diagonal_computation [protected] |
flat if optimized diagonal computation is used
在文件DiceKernelNormalizer.h第139行定义。
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