Layers Output

[Wen__Chengyao]

hi,

Is it possible to get the ouput data(blob) of every layer in the network from cvsdk? I am working on the LPR model which is located in /opt/intel/computer_vision_sdk_2018.1.249/deployment_tools/intel_models/license-plate-recognition-barrier-0001/FP32/license-plate-recognition-barrier-0001.xml

From the deploy file, the "decode" layer gets the output data from "reshape2" layer and produce the printed output of the network, and I was failed  trying to get the output data of "reshape2" layer. Here are the 2 attempts I have tried:

1.

InferRequest::Ptr request;
float* decode_blob = request->GetBlob("decode")->buffer().as<float*>();
float* reshape2_blob = request->GetBlob("reshape2")->buffer().as<float*>();

GetBlob("decode") works well while I got the error 

terminate called after throwing an instance of 'InferenceEngine::details::InferenceEngineException' what(): Cannot find blob with name: reshape2

2.

InferenceEngine::CNNLayerPtr m_layer = (m_network.getLayerByName("reshape2"));
Ptr m_ptr = InferenceEngine::Blob::CreateFromData(m_layer->outData[0]);
float* m_data = m_ptr->buffer().as<float*>();

m_ptr contains the correct information of blobs, like dims() or size(), however when I called buffer().as<float*>(), I got an null pointer.

Is there any thing wrong in my attempts? or Is there any other way to get the output data of layers in the network?

Thanks!

[Monique_J_Intel]

Hi Chingyao,

It's possible that in the device plugin that the inference engine is using that layer was fused or taken out. So to see if that's the case lets do a preliminary check. Can you check in your .xml file that the reshape layer actually exist?

There are other ways to get the output data from a layer. If you look in the mask_rcnn sample in R3(I noticed you are on an earlier release so you may want to upgrade) you will see that you can use the following statements:

const auto do_blob = infer_request.GetBlob("layer name");
const auto do_data = do_blob->buffer().as<float*>(); 

Kind Regards,

Monique Jones

[chan__allen]

Hi Jones,

I tried your way to get blob out in openvino computer_vision_sdk_2018.3.343, and I confirmed that the blob truly exists in the xml file, but I got the errro:

[ERROR][NOT FOUND] Failed to find input or output with name:'my_reshape'

'my_reshape' is a layer of my net.

Do you know how I can solve this one?

A lot of thanks.

Allenn Chan

[Wong__Shane]

I have the same problem.

Is there any limitations while using request.GetBlob("layer name") api?

[Shubha_R_Intel]

Dear Shane:

Have you tried the full hierarchical name rather than just the last part of the name ? You will be able to see the full hierarchical name in Model Optimizer's resultant IR xml. For instance in this example,

        <layer id="0" name="main/stage_1/conv2d_0/Conv2D" precision="FP16" type="Convolution">  the layer name would actually be: "main/stage_1/conv2d_0/Conv2D" not "conv2D".

Hope this helps and please download the 2019 R1 release of OpenVino which dropped today !

Thanks for using OpenVino,

Shubha