| syntax = "proto2"; |
| |
| package caffe2; |
| |
| // Original Caffe1 Datum copy: this is used in image input op to allow us to |
| // load caffe1 serialized datum without having to regenerate the database. |
| message CaffeDatum { |
| optional int32 channels = 1; |
| optional int32 height = 2; |
| optional int32 width = 3; |
| // the actual image data, in bytes |
| optional bytes data = 4; |
| optional int32 label = 5; |
| // Optionally, the datum could also hold float data. |
| repeated float float_data = 6; |
| // If true data contains an encoded image that need to be decoded |
| optional bool encoded = 7 [ default = false ]; |
| } |
| |
| enum LegacyPadding { |
| NOTSET = 0; // Do not use old-stype padding strategies. |
| |
| // VALID and SAME are two strategies adopted in Google DistBelief: it forces |
| // the input shape as follows. For SAME, the output is: |
| // R_out = ceil(float(R) / float(S)) |
| // C_out = ceil(float(C) / float(S)) |
| // where R and C are row and column, S is the stride, and K is the kernel. |
| // The number of padded pixels is then computed as |
| // Pr = ((R_out - 1) * S + K - R) |
| // Pc = ((C_out - 1) * S + K - C) |
| // When Pr and Pc are even numbers, both sides (left and right, or top and |
| // bottom) get half each. When Pr and Pc are odd numbers, the right and the |
| // bottom gets the one additional padding pixel. |
| // For VALID, padding values of 0 are always used. |
| VALID = 1; |
| SAME = 2; |
| |
| // CAFFE_LEGACY_POOLING is a flag that notifies the code to use the old Caffe |
| // padding strategy. |
| // Basically, in caffe2, after padding the convolution and pooling use the |
| // same computation strategy: half-windows at the right and bottom are |
| // discarded. In Caffe, convolution follows this strategy but if there are |
| // some pixels in the half-windows, the pooling layer will actually put one |
| // additional output. If you set LegacyPadding to this, we will compute the |
| // equivalent padding strategy in caffe2 so that the output size is |
| // backward compatible with Caffe. |
| // THIS IS NOW DEPRECATED. ANY non-conventional use has to be manually |
| // converted. |
| CAFFE_LEGACY_POOLING = 3; |
| } |