I run python demo.py failed! about bottom-up-attention HOT 3 CLOSED

It looks like you did not build with python layers. Try uncommenting WITH_PYTHON_LAYER := 1 in Caffe Makefile.config and making a clean build.

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I uncommenting WITH_PYTHON_LAYER := 1 in caffe makefile.config and making a clean build.
I got this error.
CXX/LD -o .build_release/examples/mnist/convert_mnist_data.bin
.build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)' .build_release/lib/libcaffe.so: undefined reference to cv::imencode(cv::String const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator >&, std::vector<int, std::allocator > const&)'
.build_release/lib/libcaffe.so: undefined reference to cv::imdecode(cv::_InputArray const&, int)' collect2: error: ld returned 1 exit status Makefile:625: recipe for target '.build_release/tools/upgrade_solver_proto_text.bin' failed make: *** [.build_release/tools/upgrade_solver_proto_text.bin] Error 1 make: *** Waiting for unfinished jobs.... .build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)'
.build_release/lib/libcaffe.so: undefined reference to cv::imencode(cv::String const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator<unsigned char> >&, std::vector<int, std::allocator<int> > const&)' .build_release/lib/libcaffe.so: undefined reference to cv::imdecode(cv::_InputArray const&, int)'
collect2: error: ld returned 1 exit status
Makefile:625: recipe for target '.build_release/tools/extract_features.bin' failed
make: *** [.build_release/tools/extract_features.bin] Error 1
.build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)' .build_release/lib/libcaffe.so: undefined reference to cv::imencode(cv::String const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator >&, std::vector<int, std::allocator > const&)'
.build_release/lib/libcaffe.so: undefined reference to cv::imdecode(cv::_InputArray const&, int)' collect2: error: ld returned 1 exit status Makefile:625: recipe for target '.build_release/tools/convert_imageset.bin' failed make: *** [.build_release/tools/convert_imageset.bin] Error 1 .build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)'
.build_release/lib/libcaffe.so: undefined reference to cv::imencode(cv::String const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator<unsigned char> >&, std::vector<int, std::allocator<int> > const&)' .build_release/lib/libcaffe.so: undefined reference to cv::imdecode(cv::_InputArray const&, int)'
collect2: error: ld returned 1 exit status
Makefile:625: recipe for target '.build_release/tools/upgrade_net_proto_binary.bin' failed
make: *** [.build_release/tools/upgrade_net_proto_binary.bin] Error 1
.build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)' .build_release/lib/libcaffe.so: undefined reference to cv::imencode(cv::String const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator >&, std::vector<int, std::allocator > const&)'
.build_release/lib/libcaffe.so: undefined reference to cv::imdecode(cv::_InputArray const&, int)' collect2: error: ld returned 1 exit status Makefile:625: recipe for target '.build_release/tools/caffe.bin' failed make: *** [.build_release/tools/caffe.bin] Error 1 .build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)'
.build_release/lib/libcaffe.so: undefined reference to cv::imencode(cv::String const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator<unsigned char> >&, std::vector<int, std::allocator<int> > const&)' .build_release/lib/libcaffe.so: undefined reference to cv::imdecode(cv::_InputArray const&, int)'
collect2: error: ld returned 1 exit status
Makefile:625: recipe for target '.build_release/tools/upgrade_net_proto_text.bin' failed
make: *** [.build_release/tools/upgrade_net_proto_text.bin] Error 1
.build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)' .build_release/lib/libcaffe.so: undefined reference to cv::imencode(cv::String const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator >&, std::vector<int, std::allocator > const&)'
.build_release/lib/libcaffe.so: undefined reference to cv::imdecode(cv::_InputArray const&, int)' collect2: error: ld returned 1 exit status Makefile:625: recipe for target '.build_release/tools/compute_image_mean.bin' failed make: *** [.build_release/tools/compute_image_mean.bin] Error 1 .build_release/lib/libcaffe.so: undefined reference to cv::imread(cv::String const&, int)'
.build_release/lib/libcaffe.so: undefined reference to cv::imencode(cv::String const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator<unsigned char> >&, std::vector<int, std::allocator<int> > const&)' .build_release/lib/libcaffe.so: undefined reference to cv::imdecode(cv::_InputArray const&, int)'
collect2: error: ld returned 1 exit status
Makefile:630: recipe for target '.build_release/examples/mnist/convert_mnist_data.bin' failed
make: *** [.build_release/examples/mnist/convert_mnist_data.bin] Error 1

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This is also related to the Caffe config, for OpenCV in this case. This stuff is all documented in Caffe, e.g.
BVLC/caffe#3700

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