caffe2pytorch

This tool aims to load caffe prototxt and weights directly in pytorch without explicitly converting model from caffe to pytorch.

Usage

from caffenet import *

def load_image(imgfile):
    import caffe
    image = caffe.io.load_image(imgfile)
    transformer = caffe.io.Transformer({'data': (1, 3, args.height, args.width)})
    transformer.set_transpose('data', (2, 0, 1))
    transformer.set_mean('data', np.array([args.meanB, args.meanG, args.meanR]))
    transformer.set_raw_scale('data', args.scale)
    transformer.set_channel_swap('data', (2, 1, 0))

    image = transformer.preprocess('data', image)
    image = image.reshape(1, 3, args.height, args.width)
    return image

def forward_pytorch(protofile, weightfile, image):
    net = CaffeNet(protofile)
    print(net)
    net.load_weights(weightfile)
    net.eval()
    image = torch.from_numpy(image)
    image = Variable(image)
    blobs = net(image)
    return blobs, net.models

imgfile = 'data/cat.jpg'
protofile = 'resnet50/deploy.prototxt'
weightfile = 'resnet50/resnet50.caffemodel'
image = load_image(imgfile)
pytorch_blobs, pytorch_models = forward_pytorch(protofile, weightfile, image)

Todos

• support forward classification networks: AlexNet, VGGNet, GoogleNet, ResNet, ResNeXt, DenseNet
• support forward detection networks: SSD300, S3FD, FPN

Supported Layers

Each layer in caffe will have a corresponding layer in pytorch.

• Convolution
• InnerProduct
• BatchNorm
• Scale
• ReLU
• Pooling
• Reshape
• Softmax
• SoftmaxWithLoss.
• Dropout
• Eltwise
• Normalize
• Permute
• Flatten
• Slice
• Concat
• PriorBox
• LRN : gpu version is ok, cpu version produce big difference
• DetectionOutput: support batchsize=1, num_classes=1 forward
• Crop
• Deconvolution

Verify between caffe and pytorch

The script verify.py can verify the parameter and output difference between caffe and pytorch.

python verify.py --protofile resnet50/deploy.prototxt --weightfile resnet50/resnet50.caffemodel --imgfile data/cat.jpg --meanB 104.01 --meanG 116.67 --meanR 122.68 --scale 255 --height 224 --width 224 --synset_words data/synset_words.txt --cuda

Note:

1. synset_words.txt contains class information, each line represents the description of a class.
2. resnet50 is downloaded from BaiduYun

Outputs:

------------ Parameter Difference ------------
conv1                                weight_diff: 0.000000        bias_diff: 0.000000
bn_conv1                       running_mean_diff: 0.000000 running_var_diff: 0.000000
scale_conv1                          weight_diff: 0.000000        bias_diff: 0.000000
res2a_branch1                        weight_diff: 0.000000
bn2a_branch1                   running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2a_branch1                      weight_diff: 0.000000        bias_diff: 0.000000
res2a_branch2a                       weight_diff: 0.000000
bn2a_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2a_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res2a_branch2b                       weight_diff: 0.000000
bn2a_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2a_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res2a_branch2c                       weight_diff: 0.000000
bn2a_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2a_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res2b_branch2a                       weight_diff: 0.000000
bn2b_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2b_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res2b_branch2b                       weight_diff: 0.000000
bn2b_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2b_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res2b_branch2c                       weight_diff: 0.000000
bn2b_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2b_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res2c_branch2a                       weight_diff: 0.000000
bn2c_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2c_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res2c_branch2b                       weight_diff: 0.000000
bn2c_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2c_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res2c_branch2c                       weight_diff: 0.000000
bn2c_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale2c_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res3a_branch1                        weight_diff: 0.000000
bn3a_branch1                   running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3a_branch1                      weight_diff: 0.000000        bias_diff: 0.000000
res3a_branch2a                       weight_diff: 0.000000
bn3a_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3a_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res3a_branch2b                       weight_diff: 0.000000
bn3a_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3a_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res3a_branch2c                       weight_diff: 0.000000
bn3a_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3a_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res3b_branch2a                       weight_diff: 0.000000
bn3b_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3b_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res3b_branch2b                       weight_diff: 0.000000
bn3b_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3b_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res3b_branch2c                       weight_diff: 0.000000
bn3b_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3b_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res3c_branch2a                       weight_diff: 0.000000
bn3c_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3c_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res3c_branch2b                       weight_diff: 0.000000
bn3c_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3c_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res3c_branch2c                       weight_diff: 0.000000
bn3c_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3c_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res3d_branch2a                       weight_diff: 0.000000
bn3d_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3d_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res3d_branch2b                       weight_diff: 0.000000
bn3d_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3d_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res3d_branch2c                       weight_diff: 0.000000
bn3d_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale3d_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res4a_branch1                        weight_diff: 0.000000
bn4a_branch1                   running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4a_branch1                      weight_diff: 0.000000        bias_diff: 0.000000
res4a_branch2a                       weight_diff: 0.000000
bn4a_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4a_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res4a_branch2b                       weight_diff: 0.000000
bn4a_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4a_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res4a_branch2c                       weight_diff: 0.000000
bn4a_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4a_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res4b_branch2a                       weight_diff: 0.000000
bn4b_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4b_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res4b_branch2b                       weight_diff: 0.000000
bn4b_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4b_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res4b_branch2c                       weight_diff: 0.000000
bn4b_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4b_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res4c_branch2a                       weight_diff: 0.000000
bn4c_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4c_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res4c_branch2b                       weight_diff: 0.000000
bn4c_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4c_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res4c_branch2c                       weight_diff: 0.000000
bn4c_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4c_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res4d_branch2a                       weight_diff: 0.000000
bn4d_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4d_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res4d_branch2b                       weight_diff: 0.000000
bn4d_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4d_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res4d_branch2c                       weight_diff: 0.000000
bn4d_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4d_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res4e_branch2a                       weight_diff: 0.000000
bn4e_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4e_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res4e_branch2b                       weight_diff: 0.000000
bn4e_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4e_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res4e_branch2c                       weight_diff: 0.000000
bn4e_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4e_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res4f_branch2a                       weight_diff: 0.000000
bn4f_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4f_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res4f_branch2b                       weight_diff: 0.000000
bn4f_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4f_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res4f_branch2c                       weight_diff: 0.000000
bn4f_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale4f_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res5a_branch1                        weight_diff: 0.000000
bn5a_branch1                   running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5a_branch1                      weight_diff: 0.000000        bias_diff: 0.000000
res5a_branch2a                       weight_diff: 0.000000
bn5a_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5a_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res5a_branch2b                       weight_diff: 0.000000
bn5a_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5a_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res5a_branch2c                       weight_diff: 0.000000
bn5a_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5a_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res5b_branch2a                       weight_diff: 0.000000
bn5b_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5b_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res5b_branch2b                       weight_diff: 0.000000
bn5b_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5b_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res5b_branch2c                       weight_diff: 0.000000
bn5b_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5b_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
res5c_branch2a                       weight_diff: 0.000000
bn5c_branch2a                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5c_branch2a                     weight_diff: 0.000000        bias_diff: 0.000000
res5c_branch2b                       weight_diff: 0.000000
bn5c_branch2b                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5c_branch2b                     weight_diff: 0.000000        bias_diff: 0.000000
res5c_branch2c                       weight_diff: 0.000000
bn5c_branch2c                  running_mean_diff: 0.000000 running_var_diff: 0.000000
scale5c_branch2c                     weight_diff: 0.000000        bias_diff: 0.000000
------------ Output Difference ------------
data                           output_diff: 0.000000
conv1                          output_diff: 0.000000
pool1                          output_diff: 0.000000
res2a_branch1                  output_diff: 0.000000
res2a_branch2a                 output_diff: 0.000000
res2a_branch2b                 output_diff: 0.000000
res2a_branch2c                 output_diff: 0.000000
res2a                          output_diff: 0.000000
res2b_branch2a                 output_diff: 0.000000
res2b_branch2b                 output_diff: 0.000000
res2b_branch2c                 output_diff: 0.000001
res2b                          output_diff: 0.000000
res2c_branch2a                 output_diff: 0.000000
res2c_branch2b                 output_diff: 0.000001
res2c_branch2c                 output_diff: 0.000001
res2c                          output_diff: 0.000001
res3a_branch1                  output_diff: 0.000001
res3a_branch2a                 output_diff: 0.000000
res3a_branch2b                 output_diff: 0.000000
res3a_branch2c                 output_diff: 0.000001
res3a                          output_diff: 0.000000
res3b_branch2a                 output_diff: 0.000000
res3b_branch2b                 output_diff: 0.000000
res3b_branch2c                 output_diff: 0.000000
res3b                          output_diff: 0.000000
res3c_branch2a                 output_diff: 0.000000
res3c_branch2b                 output_diff: 0.000000
res3c_branch2c                 output_diff: 0.000000
res3c                          output_diff: 0.000000
res3d_branch2a                 output_diff: 0.000000
res3d_branch2b                 output_diff: 0.000000
res3d_branch2c                 output_diff: 0.000001
res3d                          output_diff: 0.000001
res4a_branch1                  output_diff: 0.000001
res4a_branch2a                 output_diff: 0.000000
res4a_branch2b                 output_diff: 0.000000
res4a_branch2c                 output_diff: 0.000001
res4a                          output_diff: 0.000001
res4b_branch2a                 output_diff: 0.000000
res4b_branch2b                 output_diff: 0.000000
res4b_branch2c                 output_diff: 0.000001
res4b                          output_diff: 0.000000
res4c_branch2a                 output_diff: 0.000000
res4c_branch2b                 output_diff: 0.000000
res4c_branch2c                 output_diff: 0.000001
res4c                          output_diff: 0.000000
res4d_branch2a                 output_diff: 0.000000
res4d_branch2b                 output_diff: 0.000000
res4d_branch2c                 output_diff: 0.000001
res4d                          output_diff: 0.000000
res4e_branch2a                 output_diff: 0.000000
res4e_branch2b                 output_diff: 0.000000
res4e_branch2c                 output_diff: 0.000001
res4e                          output_diff: 0.000000
res4f_branch2a                 output_diff: 0.000000
res4f_branch2b                 output_diff: 0.000000
res4f_branch2c                 output_diff: 0.000001
res4f                          output_diff: 0.000000
res5a_branch1                  output_diff: 0.000002
res5a_branch2a                 output_diff: 0.000000
res5a_branch2b                 output_diff: 0.000000
res5a_branch2c                 output_diff: 0.000001
res5a                          output_diff: 0.000001
res5b_branch2a                 output_diff: 0.000000
res5b_branch2b                 output_diff: 0.000000
res5b_branch2c                 output_diff: 0.000001
res5b                          output_diff: 0.000001
res5c_branch2a                 output_diff: 0.000000
res5c_branch2b                 output_diff: 0.000000
res5c_branch2c                 output_diff: 0.000002
res5c                          output_diff: 0.000001
pool5                          output_diff: 0.000000
fc1000                         output_diff: 0.000001
prob                           output_diff: 0.000000
------------ Classification ------------
pytorch classification top1: 0.193016 n02113023 Pembroke, Pembroke Welsh corgi
caffe   classification top1: 0.193018 n02113023 Pembroke, Pembroke Welsh corgi