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Diffstat (limited to 'extern/libmv/third_party/fast/nonmax.c')
-rw-r--r--extern/libmv/third_party/fast/nonmax.c117
1 files changed, 0 insertions, 117 deletions
diff --git a/extern/libmv/third_party/fast/nonmax.c b/extern/libmv/third_party/fast/nonmax.c
deleted file mode 100644
index 6ed0f580906..00000000000
--- a/extern/libmv/third_party/fast/nonmax.c
+++ /dev/null
@@ -1,117 +0,0 @@
-#include <stdlib.h>
-#include "fast.h"
-
-
-#define Compare(X, Y) ((X)>=(Y))
-
-xy* nonmax_suppression(const xy* corners, const int* scores, int num_corners, int* ret_num_nonmax)
-{
- int num_nonmax=0;
- int last_row;
- int* row_start;
- int i, j;
- xy* ret_nonmax;
- const int sz = (int)num_corners;
-
- /*Point above points (roughly) to the pixel above the one of interest, if there
- is a feature there.*/
- int point_above = 0;
- int point_below = 0;
-
-
- if(num_corners < 1)
- {
- *ret_num_nonmax = 0;
- return 0;
- }
-
- ret_nonmax = (xy*)malloc(num_corners * sizeof(xy));
-
- /* Find where each row begins
- (the corners are output in raster scan order). A beginning of -1 signifies
- that there are no corners on that row. */
- last_row = corners[num_corners-1].y;
- row_start = (int*)malloc((last_row+1)*sizeof(int));
-
- for(i=0; i < last_row+1; i++)
- row_start[i] = -1;
-
- {
- int prev_row = -1;
- for(i=0; i< num_corners; i++)
- if(corners[i].y != prev_row)
- {
- row_start[corners[i].y] = i;
- prev_row = corners[i].y;
- }
- }
-
-
-
- for(i=0; i < sz; i++)
- {
- int score = scores[i];
- xy pos = corners[i];
-
- /*Check left */
- if(i > 0)
- if(corners[i-1].x == pos.x-1 && corners[i-1].y == pos.y && Compare(scores[i-1], score))
- continue;
-
- /*Check right*/
- if(i < (sz - 1))
- if(corners[i+1].x == pos.x+1 && corners[i+1].y == pos.y && Compare(scores[i+1], score))
- continue;
-
- /*Check above (if there is a valid row above)*/
- if(pos.y != 0 && row_start[pos.y - 1] != -1)
- {
- /*Make sure that current point_above is one
- row above.*/
- if(corners[point_above].y < pos.y - 1)
- point_above = row_start[pos.y-1];
-
- /*Make point_above point to the first of the pixels above the current point,
- if it exists.*/
- for(; corners[point_above].y < pos.y && corners[point_above].x < pos.x - 1; point_above++)
- {}
-
-
- for(j=point_above; corners[j].y < pos.y && corners[j].x <= pos.x + 1; j++)
- {
- int x = corners[j].x;
- if( (x == pos.x - 1 || x ==pos.x || x == pos.x+1) && Compare(scores[j], score))
- goto cont;
- }
-
- }
-
- /*Check below (if there is anything below)*/
- if(pos.y != last_row && row_start[pos.y + 1] != -1 && point_below < sz) /*Nothing below*/
- {
- if(corners[point_below].y < pos.y + 1)
- point_below = row_start[pos.y+1];
-
- /* Make point below point to one of the pixels belowthe current point, if it
- exists.*/
- for(; point_below < sz && corners[point_below].y == pos.y+1 && corners[point_below].x < pos.x - 1; point_below++)
- {}
-
- for(j=point_below; j < sz && corners[j].y == pos.y+1 && corners[j].x <= pos.x + 1; j++)
- {
- int x = corners[j].x;
- if( (x == pos.x - 1 || x ==pos.x || x == pos.x+1) && Compare(scores[j],score))
- goto cont;
- }
- }
-
- ret_nonmax[num_nonmax++] = corners[i];
- cont:
- ;
- }
-
- free(row_start);
- *ret_num_nonmax = num_nonmax;
- return ret_nonmax;
-}
-