From baf3fcb491ee1a5e083fbdfdf2c28aaf36488e92 Mon Sep 17 00:00:00 2001
From: AlexeyAB <alexeyab84@gmail.com>
Date: Fri, 16 Feb 2018 23:26:08 +0000
Subject: [PATCH] Calculation TP, FP, FN, avg_IoU for default threshold during mAP calculation
---
src/detector.c | 31 ++++++++++++++++++++++++++-----
1 files changed, 26 insertions(+), 5 deletions(-)
diff --git a/src/detector.c b/src/detector.c
index ce259fd..d860a6a 100644
--- a/src/detector.c
+++ b/src/detector.c
@@ -552,9 +552,14 @@
args.h = net.h;
args.type = IMAGE_DATA;
+ const float thresh_calc_avg_iou = 0.24;
+ float avg_iou = 0;
+ int tp_for_thresh = 0;
+ int fp_for_thresh = 0;
+
box_prob *detections = calloc(1, sizeof(box_prob));
int detections_count = 0;
- int unique_truth_index = 0;
+ int unique_truth_count = 0;
int *truth_classes_count = calloc(classes, sizeof(int));
@@ -642,7 +647,7 @@
if (current_iou > iou_thresh && class_id == truth[j].id) {
if (current_iou > max_iou) {
max_iou = current_iou;
- truth_index = unique_truth_index + j;
+ truth_index = unique_truth_count + j;
}
}
}
@@ -659,14 +664,25 @@
float current_iou = box_iou(boxes[i], t);
if (current_iou > iou_thresh && class_id == truth_dif[j].id) {
--detections_count;
+ break;
}
}
}
+
+ // calc avg IoU, true-positives, false-positives for required Threshold
+ if (prob > thresh_calc_avg_iou) {
+ if (truth_index > -1) {
+ avg_iou += max_iou;
+ ++tp_for_thresh;
+ }
+ else
+ fp_for_thresh++;
+ }
}
}
}
- unique_truth_index += num_labels;
+ unique_truth_count += num_labels;
free(id);
free_image(val[t]);
@@ -674,6 +690,8 @@
}
}
+ avg_iou = avg_iou / (tp_for_thresh + fp_for_thresh);
+
// SORT(detections)
qsort(detections, detections_count, sizeof(box_prob), detections_comparator);
@@ -689,10 +707,10 @@
for (i = 0; i < classes; ++i) {
pr[i] = calloc(detections_count, sizeof(pr_t));
}
- printf("detections_count = %d, unique_truth_index = %d \n", detections_count, unique_truth_index);
+ printf("detections_count = %d, unique_truth_count = %d \n", detections_count, unique_truth_count);
- int *truth_flags = calloc(unique_truth_index, sizeof(int));
+ int *truth_flags = calloc(unique_truth_count, sizeof(int));
int rank;
for (rank = 0; rank < detections_count; ++rank) {
@@ -763,6 +781,9 @@
mean_average_precision += avg_precision;
}
+ printf(" for thresh = %0.2f, TP = %d, FP = %d, FN = %d, average IoU = %2.2f %% \n",
+ thresh_calc_avg_iou, tp_for_thresh, fp_for_thresh, unique_truth_count - tp_for_thresh, avg_iou * 100);
+
mean_average_precision = mean_average_precision / classes;
printf("\n mean average precision (mAP) = %f, or %2.2f %% \n", mean_average_precision, mean_average_precision*100);
--
Gitblit v1.10.0