Can Caffe Data layer accept mean_values directly or is it only possible to do so using mean_file

[ani...@squadrun.co]

For Example consider the following code snipet:

layer {
  name: "data"
  type: "Data"
  top: "data"
  include {
    phase: TRAIN
  }
  transform_param {
    crop_size: 448
    mean_value: 104.0
    mean_value: 117.0
    mean_value: 124.0
  }
  data_param {
    source: "path/to/train/lmdb"
    batch_size: 8
    backend: LMDB
  }
}

Is the above code snippet correct or are the mean_values {104, 117, 124} ignored and no pre -processing is done. Does that mean that mean subtraction for Data layer is only possible using mean_file argument?

[Przemek D]

It's correct, assuming your LMDB contains 3-channel images. Read about how it works right in the caffe.proto file.

[ani...@squadrun.co]

Thanks  Przemek . The link shared by you further clears all doubts.