From db0397cfaaf488364e3d2e1669dfefae2ee6ea73 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Mon, 14 Dec 2015 19:57:10 +0000
Subject: [PATCH] shortcut layers, msr networks
---
src/activations.c | 55 +++++++++++++++++++++++++++++++++++--------------------
1 files changed, 35 insertions(+), 20 deletions(-)
diff --git a/src/activations.c b/src/activations.c
index 48dce87..5a62ef5 100644
--- a/src/activations.c
+++ b/src/activations.c
@@ -8,16 +8,24 @@
char *get_activation_string(ACTIVATION a)
{
switch(a){
- case SIGMOID:
- return "sigmoid";
+ case LOGISTIC:
+ return "logistic";
case RELU:
return "relu";
+ case ELU:
+ return "elu";
+ case RELIE:
+ return "relie";
case RAMP:
return "ramp";
case LINEAR:
return "linear";
case TANH:
return "tanh";
+ case PLSE:
+ return "plse";
+ case LEAKY:
+ return "leaky";
default:
break;
}
@@ -26,41 +34,40 @@
ACTIVATION get_activation(char *s)
{
- if (strcmp(s, "sigmoid")==0) return SIGMOID;
+ if (strcmp(s, "logistic")==0) return LOGISTIC;
if (strcmp(s, "relu")==0) return RELU;
+ if (strcmp(s, "elu")==0) return ELU;
+ if (strcmp(s, "relie")==0) return RELIE;
+ if (strcmp(s, "plse")==0) return PLSE;
if (strcmp(s, "linear")==0) return LINEAR;
if (strcmp(s, "ramp")==0) return RAMP;
+ if (strcmp(s, "leaky")==0) return LEAKY;
if (strcmp(s, "tanh")==0) return TANH;
fprintf(stderr, "Couldn't find activation function %s, going with ReLU\n", s);
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 tanh_activate(float x){return x - (x*x*x)/3;}
-
-float linear_gradient(float x){return 1;}
-float sigmoid_gradient(float x){return (1-x)*x;}
-float relu_gradient(float x){return (x>0);}
-float ramp_gradient(float x){return (x>0)+.1;}
-float tanh_gradient(float x){return 1-x*x;}
-
float activate(float x, ACTIVATION a)
{
switch(a){
case LINEAR:
return linear_activate(x);
- case SIGMOID:
- return sigmoid_activate(x);
+ case LOGISTIC:
+ return logistic_activate(x);
case RELU:
return relu_activate(x);
+ case ELU:
+ return elu_activate(x);
+ case RELIE:
+ return relie_activate(x);
case RAMP:
return ramp_activate(x);
+ case LEAKY:
+ return leaky_activate(x);
case TANH:
return tanh_activate(x);
+ case PLSE:
+ return plse_activate(x);
}
return 0;
}
@@ -78,14 +85,22 @@
switch(a){
case LINEAR:
return linear_gradient(x);
- case SIGMOID:
- return sigmoid_gradient(x);
+ case LOGISTIC:
+ return logistic_gradient(x);
case RELU:
return relu_gradient(x);
+ case ELU:
+ return elu_gradient(x);
+ case RELIE:
+ return relie_gradient(x);
case RAMP:
return ramp_gradient(x);
+ case LEAKY:
+ return leaky_gradient(x);
case TANH:
return tanh_gradient(x);
+ case PLSE:
+ return plse_gradient(x);
}
return 0;
}
--
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