#include <VectorTransform.h>
Public Member Functions | |
| LinearTransform (int d_in=0, int d_out=0, bool have_bias=false) | |
| both d_in > d_out and d_out < d_in are supported | |
| void | apply_noalloc (idx_t n, const float *x, float *xt) const override |
| same as apply, but result is pre-allocated | |
| void | transform_transpose (idx_t n, const float *y, float *x) const |
| void | reverse_transform (idx_t n, const float *xt, float *x) const override |
| works only if is_orthonormal | |
| void | set_is_orthonormal () |
| compute A^T * A to set the is_orthonormal flag | |
Public Member Functions inherited from faiss::VectorTransform | |
| VectorTransform (int d_in=0, int d_out=0) | |
| ! output dimension | |
| virtual void | train (idx_t n, const float *x) |
| float * | apply (idx_t n, const float *x) const |
Public Attributes | |
| bool | have_bias |
| bool | is_orthonormal |
| ! whether to use the bias term More... | |
| std::vector< float > | A |
| Transformation matrix, size d_out * d_in. | |
| std::vector< float > | b |
| bias vector, size d_out | |
| bool | verbose |
Public Attributes inherited from faiss::VectorTransform | |
| int | d_in |
| int | d_out |
| ! input dimension | |
| bool | is_trained |
Additional Inherited Members | |
Public Types inherited from faiss::VectorTransform | |
| typedef Index::idx_t | idx_t |
Generic linear transformation, with bias term applied on output y = A * x + b
Definition at line 76 of file VectorTransform.h.
| void LinearTransform::transform_transpose | ( | idx_t | n, |
| const float * | y, | ||
| float * | x | ||
| ) | const |
compute x = A^T * (x - b) is reverse transform if A has orthonormal lines
Definition at line 136 of file VectorTransform.cpp.
| bool faiss::LinearTransform::is_orthonormal |
! whether to use the bias term
check if matrix A is orthonormal (enables reverse_transform)
Definition at line 81 of file VectorTransform.h.
1.8.5