dsift.c File Reference
Detailed Description
For internal use only.
Definition in file dsift.c.
#include "dsift.h"
#include "pgm.h"
Go to the source code of this file.
Functions | |
float * | _vl_dsift_new_kernel (int binSize, int numBins, int binIndex) |
Initialize new convolution kernel. | |
VL_INLINE float | _vl_dsift_normalize_histogram (float *begin, float *end) |
Normalize histogram. | |
void | _vl_dsift_free_buffers (VlDsiftFilter *self) |
Free internal buffers. | |
void | _vl_dsift_update_buffers (VlDsiftFilter *self) |
void | _vl_dsift_alloc_buffers (VlDsiftFilter *self) |
Allocate internal buffers. | |
VL_EXPORT VlDsiftFilter * | vl_dsift_new (int imWidth, int imHeight) |
Create a new DSIFT filter. | |
VL_EXPORT VlDsiftFilter * | vl_dsift_new_basic (int imWidth, int imHeight, int step, int binSize) |
Create a new DSIFT filter (basic interface). | |
VL_EXPORT void | vl_dsift_delete (VlDsiftFilter *self) |
Delete DSIFT filter. | |
VL_INLINE void | _vl_dsift_with_gaussian_window (VlDsiftFilter *self) |
Process with Gaussian window. | |
VL_INLINE void | _vl_dsift_with_flat_window (VlDsiftFilter *self) |
Process with flat window. | |
void | vl_dsift_process (VlDsiftFilter *self, float const *im) |
Compute keypoints and descriptors. |
Function Documentation
void _vl_dsift_alloc_buffers | ( | VlDsiftFilter * | self | ) |
For internal use only.
- Parameters:
-
self DSIFT filter.
Definition at line 358 of file dsift.c.
References _vl_dsift_free_buffers(), _vl_dsift_update_buffers(), vl_dsift_get_descriptor_size(), vl_dsift_get_keypoint_num(), and vl_malloc().
Referenced by vl_dsift_process().
void _vl_dsift_free_buffers | ( | VlDsiftFilter * | self | ) |
For internal use only.
- Parameters:
-
self DSIFT filter.
Definition at line 303 of file dsift.c.
References vl_free().
Referenced by _vl_dsift_alloc_buffers(), and vl_dsift_delete().
float* _vl_dsift_new_kernel | ( | int | binSize, | |
int | numBins, | |||
int | binIndex | |||
) |
For internal use only.
- Parameters:
-
binSize numBins binIndex negative to use flat window.
- Returns:
- a pointer to new filter.
Definition at line 247 of file dsift.c.
References vl_malloc().
Referenced by _vl_dsift_with_gaussian_window().
VL_INLINE float _vl_dsift_normalize_histogram | ( | float * | begin, | |
float * | end | |||
) |
For internal use only.
- Parameters:
-
begin end
Definition at line 280 of file dsift.c.
References VL_EPSILON_F, and vl_fast_sqrt_f().
Referenced by vl_dsift_process().
void _vl_dsift_update_buffers | ( | VlDsiftFilter * | self | ) |
For internal use only.
Definition at line 329 of file dsift.c.
Referenced by _vl_dsift_alloc_buffers(), vl_dsift_new(), vl_dsift_set_bounds(), vl_dsift_set_geometry(), and vl_dsift_set_steps().
VL_INLINE void _vl_dsift_with_flat_window | ( | VlDsiftFilter * | self | ) |
For internal use only.
- Parameters:
-
f filter to delete.
Definition at line 561 of file dsift.c.
References vl_dsift_get_descriptor_size(), vl_imconvcoltri_vf(), VL_PAD_BY_CONTINUITY, and VL_TRANSPOSE.
Referenced by vl_dsift_process().
VL_INLINE void _vl_dsift_with_gaussian_window | ( | VlDsiftFilter * | self | ) |
For internal use only.
- Parameters:
-
self filter to delete.
Definition at line 488 of file dsift.c.
References _vl_dsift_new_kernel(), vl_dsift_get_descriptor_size(), vl_free(), vl_imconvcol_vf(), VL_PAD_BY_CONTINUITY, and VL_TRANSPOSE.
Referenced by vl_dsift_process().
VL_EXPORT void vl_dsift_delete | ( | VlDsiftFilter * | self | ) |
- Parameters:
-
self filter to delete.
Definition at line 472 of file dsift.c.
References _vl_dsift_free_buffers(), and vl_free().
VL_EXPORT VlDsiftFilter* vl_dsift_new | ( | int | imWidth, | |
int | imHeight | |||
) |
- Parameters:
-
imWidth width of the image. imHeight height of the image
- Returns:
- new filter.
Definition at line 400 of file dsift.c.
References _vl_dsift_update_buffers(), VL_FALSE, and vl_malloc().
Referenced by vl_dsift_new_basic().
VL_EXPORT VlDsiftFilter* vl_dsift_new_basic | ( | int | imWidth, | |
int | imHeight, | |||
int | step, | |||
int | binSize | |||
) |
- Parameters:
-
imWidth width of the image. imHeight height of the image. step sampling step. binSize bin size.
- Returns:
- new filter.
Definition at line 454 of file dsift.c.
References VlDsiftDescriptorGeometry_::binSizeX, VlDsiftDescriptorGeometry_::binSizeY, vl_dsift_get_geometry(), vl_dsift_new(), vl_dsift_set_geometry(), and vl_dsift_set_steps().
void vl_dsift_process | ( | VlDsiftFilter * | self, | |
float const * | im | |||
) |
- Parameters:
-
self DSIFT filter. im image data.
Definition at line 620 of file dsift.c.
References _vl_dsift_alloc_buffers(), _vl_dsift_normalize_histogram(), _vl_dsift_with_flat_window(), _vl_dsift_with_gaussian_window(), VlDsiftKeypoint_::norm, vl_dsift_get_descriptor_size(), vl_fast_atan2_f(), vl_fast_sqrt_f(), vl_floor_f(), vl_mod_2pi_f(), VL_PI, VlDsiftKeypoint_::x, and VlDsiftKeypoint_::y.