mirrors/libfprint
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/libfprint/libfprint.git synced 2025-11-15 07:38:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

Rework some image handling; add public binarization API

Browse Source 
I want to offer the ability for an application to view a binarized
version of a scanned print. This lead onto a few changes:

 1. Store minutiae and binarized data inside fp_img
 2. Move resize code to the capture path, it previously happened much
    later.
 3. Add fp_img_binarize() to return a new image in binarized form.
 4. Add a BINARIZED_FORM flag to prevent an image being binarized again.

In future, it would be nice to be able to binarize without detecting
minutiae, but this involves some work on the NBIS interaction.
This commit is contained in:
Daniel Drake
2007-11-17 12:46:00 +00:00
parent 72c304999a
commit ba24c0884a
8 changed files with 198 additions and 106 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
libfprint/fp_internal.h
View File

@@ -191,16 +191,43 @@ gboolean fpi_print_data_compatible(uint16_t driver_id1, uint32_t devtype1,
enum fp_print_data_type type1, uint16_t driver_id2, uint32_t devtype2,
enum fp_print_data_type type2);
struct fp_minutia {
int x;
int y;
int ex;
int ey;
int direction;
double reliability;
int type;
int appearing;
int feature_id;
int *nbrs;
int *ridge_counts;
int num_nbrs;
};
struct fp_minutiae {
int alloc;
int num;
struct fp_minutia **list;
};
/* bit values for fp_img.flags */
#define FP_IMG_V_FLIPPED (1<<0)
#define FP_IMG_H_FLIPPED (1<<1)
#define FP_IMG_COLORS_INVERTED (1<<2)
#define FP_IMG_BINARIZED_FORM (1<<3)
#define FP_IMG_STANDARDIZATION_FLAGS (FP_IMG_V_FLIPPED | FP_IMG_H_FLIPPED \
| FP_IMG_COLORS_INVERTED)
struct fp_img {
int width;
int height;
size_t length;
uint16_t flags;
struct fp_minutiae *minutiae;
unsigned char *binarized;
unsigned char data[0];
};
@@ -208,7 +235,8 @@ struct fp_img *fpi_img_new(size_t length);
struct fp_img *fpi_img_new_for_imgdev(struct fp_img_dev *dev);
struct fp_img *fpi_img_resize(struct fp_img *img, size_t newsize);
gboolean fpi_img_is_sane(struct fp_img *img);
int fpi_img_detect_minutiae(struct fp_img_dev *imgdev, struct fp_img *img,
int fpi_img_detect_minutiae(struct fp_img *img);
int fpi_img_to_print_data(struct fp_img_dev *imgdev, struct fp_img *img,
struct fp_print_data **ret);
int fpi_img_compare_print_data(struct fp_print_data *enrolled_print,
struct fp_print_data *new_print);