mirror/darknet
1
0
Fork 0
mirror of https://github.com/pjreddie/darknet.git synced 2023-08-10 21:13:14 +03:00
Code Issues Projects Releases Wiki Activity

so much need to commit

Browse Source
This commit is contained in:
Joseph Redmon
2016-05-06 16:25:16 -07:00
parent 0dff437a69
commit c7b10ceadb
37 changed files with 1502 additions and 438 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
src/activations.h
View File

@ -4,7 +4,7 @@
#include "math.h"
typedef enum{
LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU, LOGGY
LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU, LOGGY, STAIR
}ACTIVATION;
ACTIVATION get_activation(char *s);
@ -19,6 +19,12 @@ void activate_array_ongpu(float *x, int n, ACTIVATION a);
void gradient_array_ongpu(float *x, int n, ACTIVATION a, float *delta);
#endif
static inline float stair_activate(float x)
{
int n = floor(x);
if (n%2 == 0) return floor(x/2.);
else return (x - n) + floor(x/2.);
}
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;}
@ -42,6 +48,11 @@ static inline float loggy_gradient(float x)
float y = (x+1.)/2.;
return 2*(1-y)*y;
}
static inline float stair_gradient(float x)
{
if (floor(x) == x) return 0;
return 1;
}
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;}