aboutsummaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
authorThomas White <taw@physics.org>2010-03-08 10:50:55 +0100
committerThomas White <taw@physics.org>2010-03-08 11:20:30 +0100
commitac6d29a0d946ebc6a539c4f9402417ca252de82f (patch)
tree3910de8c234b6d602bb33fb123e4f24dba0d0589 /src
parent2e09f17922cde19552d0f5140411985eadc06724 (diff)
Tidy up and fix peak detection (carnage created by earlier refactoring)
Diffstat (limited to 'src')
-rw-r--r--src/peaks.c82
1 files changed, 50 insertions, 32 deletions
diff --git a/src/peaks.c b/src/peaks.c
index 49537e79..5cbf0f17 100644
--- a/src/peaks.c
+++ b/src/peaks.c
@@ -308,6 +308,16 @@ void search_peaks(struct image *image)
{
int x, y, width, height;
float *data;
+ double d;
+ int idx;
+ float fx = 0.0;
+ float fy = 0.0;
+ float intensity = 0.0;
+ int nrej_dis = 0;
+ int nrej_hot = 0;
+ int nrej_pro = 0;
+ int nrej_fra = 0;
+ int nacc = 0;
data = image->data;
width = image->width;
@@ -327,7 +337,7 @@ void search_peaks(struct image *image)
int mask_x, mask_y;
int sx, sy;
double max;
- unsigned int did_something = 1;
+ unsigned int did_something;
/* Overall threshold */
if ( data[x+width*y] < 800 ) continue;
@@ -348,13 +358,12 @@ void search_peaks(struct image *image)
/* Calculate overall gradient */
grad = dxs + dys;
- if ( grad < 1000000 ) continue;
+ if ( grad < 100000 ) continue;
mask_x = x;
mask_y = y;
- while ( (did_something)
- && (distance(mask_x, mask_y, x, y)<50) ) {
+ do {
max = data[mask_x+width*mask_y];
did_something = 0;
@@ -376,47 +385,56 @@ void search_peaks(struct image *image)
}
}
- }
-
- if ( !did_something ) {
-
- double d;
- int idx;
- float x = 0.0;
- float y = 0.0;
- float intensity = 0.0;
-
- assert(mask_x<image->width);
- assert(mask_y<image->height);
- assert(mask_x>=0);
- assert(mask_y>=0);
+ /* Abort if drifted too far from the foot point */
+ if ( distance(mask_x, mask_y, x, y) > 50.0 ) break;
- /* Too far from foot point? */
- if ( distance(mask_x, mask_y, x, y) > 50.0 ) continue;
+ } while ( did_something );
- /* Isolated hot pixel? */
- if ( is_hot_pixel(image, mask_x, mask_y) ) continue;
-
- integrate_peak(image, mask_x, mask_y,
- &x, &y, &intensity);
+ /* Too far from foot point? */
+ if ( distance(mask_x, mask_y, x, y) > 50.0 ) {
+ nrej_dis++;
+ continue;
+ }
- /* Check for a nearby feature */
- image_feature_closest(image->features, mask_x, mask_y,
- &d, &idx);
+ /* Should be enforced by bounds used above. Muppet check. */
+ assert(mask_x < image->width);
+ assert(mask_y < image->height);
+ assert(mask_x >= 0);
+ assert(mask_y >= 0);
- if ( d > 15.0 ) {
+ /* Isolated hot pixel? */
+ if ( is_hot_pixel(image, mask_x, mask_y) ) {
+ nrej_hot++;
+ continue;
+ }
- image_add_feature(image->features, x, y,
- image, intensity);
+ /* Centroid peak and get better coordinates */
+ integrate_peak(image, mask_x, mask_y, &fx, &fy, &intensity);
- }
+ /* It is possible for the centroid to fall outside the image */
+ if ( (fx < 0.0) || (fx > image->width)
+ || (fy < 0.0) || (fy > image->height) ) {
+ nrej_fra++;
+ continue;
+ }
+ /* Check for a nearby feature */
+ image_feature_closest(image->features, fx, fy, &d, &idx);
+ if ( d < 15.0 ) {
+ nrej_pro++;
+ continue;
}
+ /* Add using "better" coordinates */
+ image_add_feature(image->features, fx, fy, image, intensity);
+ nacc++;
}
}
+ STATUS("%i accepted, %i box, %i hot, %i proximity, %i outside frame\n",
+ nacc, nrej_dis, nrej_hot, nrej_pro, nrej_fra);
+
cull_peaks(image);
}