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This commit is contained in:
Joseph Redmon
2016-01-31 15:52:03 -08:00
parent b711627e84
commit c604f2d994
12 changed files with 91 additions and 19 deletions
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8
src/activations.h
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@ -4,7 +4,7 @@
#include "math.h"
typedef enum{
LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU
LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU, LOGGY
}ACTIVATION;
ACTIVATION get_activation(char *s);
@ -21,6 +21,7 @@ void gradient_array_ongpu(float *x, int n, ACTIVATION a, float *delta);
static inline float linear_activate(float x){return x;}
static inline float logistic_activate(float x){return 1./(1. + exp(-x));}
static inline float loggy_activate(float x){return 2./(1. + exp(-x)) - 1;}
static inline float relu_activate(float x){return x*(x>0);}
static inline float elu_activate(float x){return (x >= 0)*x + (x < 0)*(exp(x)-1);}
static inline float relie_activate(float x){return x*(x>0);}
@ -36,6 +37,11 @@ static inline float plse_activate(float x)
static inline float linear_gradient(float x){return 1;}
static inline float logistic_gradient(float x){return (1-x)*x;}
static inline float loggy_gradient(float x)
{
float y = (x+1.)/2.;
return 2*(1-y)*y;
}
static inline float relu_gradient(float x){return (x>0);}
static inline float elu_gradient(float x){return (x >= 0) + (x < 0)*(x + 1);}
static inline float relie_gradient(float x){return (x>0) ? 1 : .01;}