From 8a504c737d2bc3b9b37cb79cb50fbf7eecda07df Mon Sep 17 00:00:00 2001
From: Tino Hager <tino.hager@nager.at>
Date: Wed, 27 Jun 2018 21:56:47 +0000
Subject: [PATCH] repair tabs spaces

---
 src/region_layer.c |   15 +++++++++++----
 1 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/region_layer.c b/src/region_layer.c
index 4aff75a..4e1e03a 100644
--- a/src/region_layer.c
+++ b/src/region_layer.c
@@ -136,8 +136,9 @@
 
 			int ti = index + class_id;
 			float pt = output[ti] + 0.000000000000001F;
-			//float grad = -(1 - pt) * (2 * pt*logf(pt) + pt - 1);	// http://blog.csdn.net/linmingan/article/details/77885832	
-			float grad = (1 - pt) * (2 * pt*logf(pt) + pt - 1);		// https://github.com/unsky/focal-loss
+			// http://fooplot.com/#W3sidHlwZSI6MCwiZXEiOiItKDEteCkqKDIqeCpsb2coeCkreC0xKSIsImNvbG9yIjoiIzAwMDAwMCJ9LHsidHlwZSI6MTAwMH1d
+			float grad = -(1 - pt) * (2 * pt*logf(pt) + pt - 1);	// http://blog.csdn.net/linmingan/article/details/77885832	
+			//float grad = (1 - pt) * (2 * pt*logf(pt) + pt - 1);	// https://github.com/unsky/focal-loss
 
 			for (n = 0; n < classes; ++n) {
 				delta[index + n] = scale * (((n == class_id) ? 1 : 0) - output[index + n]);
@@ -255,6 +256,8 @@
                     int best_class_id = -1;
                     for(t = 0; t < l.max_boxes; ++t){
                         box truth = float_to_box(state.truth + t*5 + b*l.truths);
+						int class_id = state.truth[t * 5 + b*l.truths + 4];
+						if (class_id >= l.classes) continue; // if label contains class_id more than number of classes in the cfg-file
                         if(!truth.x) break;
                         float iou = box_iou(pred, truth);
                         if (iou > best_iou) {
@@ -292,6 +295,12 @@
         }
         for(t = 0; t < l.max_boxes; ++t){
             box truth = float_to_box(state.truth + t*5 + b*l.truths);
+			int class_id = state.truth[t * 5 + b*l.truths + 4];
+			if (class_id >= l.classes) {
+				printf(" Warning: in txt-labels class_id=%d >= classes=%d in cfg-file. In txt-labels class_id should be [from 0 to %d] \n", class_id, l.classes, l.classes-1);
+				getchar();
+				continue; // if label contains class_id more than number of classes in the cfg-file
+			}
 
             if(!truth.x) break;
             float best_iou = 0;
@@ -338,8 +347,6 @@
                 l.delta[best_index + 4] = l.object_scale * (iou - l.output[best_index + 4]) * logistic_gradient(l.output[best_index + 4]);
             }
 
-
-            int class_id = state.truth[t*5 + b*l.truths + 4];
             if (l.map) class_id = l.map[class_id];
             delta_region_class(l.output, l.delta, best_index + 5, class_id, l.classes, l.softmax_tree, l.class_scale, &avg_cat, l.focal_loss);
             ++count;

--
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