github源码传送门，
其源码如下所示，
message FillerParameter { // The filler type. optional string type = 1 [default = 'constant']; optional float value = 2 [default = 0]; // the value in constant filler optional float min = 3 [default = 0]; // the min value in uniform filler optional float max = 4 [default = 1]; // the max value in uniform filler optional float mean = 5 [default = 0]; // the mean value in Gaussian filler optional float std = 6 [default = 1]; // the std value in Gaussian filler // The expected number of non-zero output weights for a given input in // Gaussian filler -- the default -1 means don't perform sparsification. optional int32 sparse = 7 [default = -1]; // Normalize the filler variance by fan_in, fan_out, or their average. // Applies to 'xavier' and 'msra' fillers. enum VarianceNorm { FAN_IN = 0; FAN_OUT = 1; AVERAGE = 2; } optional VarianceNorm variance_norm = 8 [default = FAN_IN]; }