mnn/mnn-0.2.0.3/tools/converter/source/caffe/Convolution.cpp:30: Check failed: weightBlob.shape().dim_size() == 4 ==> Conv Weight Dimension ERROR!

[ghimiredhikura]

Hi,

I am having trouble converting standard cnn architecture models such as alexnet, vgg16, googlenet etc. Following is the error log.

~mnn-0.2.0.3/tools/converter/build # ./MNNConvert -f CAFFE --modelFile googlenet.caffemodel --prototxt googlenet.prototxt --benchmarkModel --MNNModel test.mnn --bizCode MNN

MNNConverter Version: 0.0.0.1 - MNN @ 2018

Start to Convert Other Model Format To MNN Model...
terminate called after throwing an instance of 'Error'
  what():  [02:44:23] /home/~/mnn-0.2.0.3/tools/converter/source/caffe/Convolution.cpp:30: Check failed: weightBlob.shape().dim_size() == 4 ==> Conv Weight Dimension ERROR!
Aborted

Please help.

Thanks.

Best,
Deepak

[czy2014hust]

Maybe your caffe model use the old caffe proto. Please give us the model link, and we test on it.

[ghimiredhikura]

These are the models that I have trouble testing: alexnet, resnet50, vgg16

Thanks.

[czy2014hust]

【Converted Done!】

[17759205390]

【Converted Done!】

@czy2014hust
你好，可以给我你的钉钉账号吗，想请教你个问题哈

[ghimiredhikura]

@czy2014hust,

Thanks for quick check. So you can convert without any error?
I am using raspberrypi 3b+, how about you?

[czy2014hust]

@czy2014hust,

Thanks for quick check. So you can convert without any error?
I am using raspberrypi 3b+, how about you?

Yes, I test on resnet50 which you provide without any error.
I think this error has nothing to do with platform.

[czy2014hust]

【Converted Done!】

@czy2014hust
你好，可以给我你的钉钉账号吗，想请教你个问题哈

可以在Github MNN钉钉群里说

[ghimiredhikura]

Thanks. I will try again.

[JackChen101]

这个问题的原因是caffe仓库中提供的alexnet模型是旧版本的模型，需要用caffe的更新工具upgrade_net_proto_binary进行更新。
请按以下步骤操作：
1、下载并编译caffe源码，得到模型更新工具

git clone https://github.com/BVLC/caffe.git
cd caffe && mkdir build && cd build
cmake -DCPU_ONLY=ON -DBUILD_python=OFF -DBUILD_python_layer=OFF -DUSE_OPENCV=OFF -DUSE_LEVELDB=OFF -DUSE_LMDB=OFF ..
make -j$(nproc)

编译完成后在tools目录下会生成upgrade_net_proto_binary和upgrade_net_proto_text等文件。
2、更新模型

./upgrade_net_proto_binary ../../../MNN/build_ubuntu/bvlc_alexnet.caffemodel ./bvlc_alexnet_upgrade.caffemodel