From 655f636a42d6e1d4518b712cfac6d973424de693 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Sun, 08 Mar 2015 18:25:28 +0000
Subject: [PATCH] detection layer fixed
---
src/activations.c | 24 ++++++++++--------------
1 files changed, 10 insertions(+), 14 deletions(-)
diff --git a/src/activations.c b/src/activations.c
index 24868a3..4689046 100644
--- a/src/activations.c
+++ b/src/activations.c
@@ -2,6 +2,7 @@
#include <math.h>
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
char *get_activation_string(ACTIVATION a)
@@ -34,13 +35,8 @@
return RELU;
}
-float linear_activate(float x){return x;}
-float sigmoid_activate(float x){return 1./(1. + exp(-x));}
-float relu_activate(float x){return x*(x>0);}
-float ramp_activate(float x){return x*(x>0)+.1*x;}
-float tanh_activate(float x){return (exp(2*x)-1)/(exp(2*x)+1);}
-
-float activate(float x, ACTIVATION a){
+float activate(float x, ACTIVATION a)
+{
switch(a){
case LINEAR:
return linear_activate(x);
@@ -64,19 +60,19 @@
}
}
-
-float gradient(float x, ACTIVATION a){
+float gradient(float x, ACTIVATION a)
+{
switch(a){
case LINEAR:
- return 1;
+ return linear_gradient(x);
case SIGMOID:
- return (1.-x)*x;
+ return sigmoid_gradient(x);
case RELU:
- return (x>0);
+ return relu_gradient(x);
case RAMP:
- return (x>0) + .1;
+ return ramp_gradient(x);
case TANH:
- return 1-x*x;
+ return tanh_gradient(x);
}
return 0;
}
--
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