topic Object detection ssd c++ sample is not working properly in Intel® Distribution of OpenVINO™ Toolkit

Object detection ssd c++ sample is not working properly

AR92 — Fri, 10 Jul 2020 23:36:25 GMT

hi,

i am working on windows machine (Plateform toolset v141), i converted a tensorflow model to IR and my python api is working but c++ example of object_detection_ssd is not working

object_detection_ssd_async is also working with camera, but not with mp4 file async example gives error for video file "The number of channels for net input and image must match"

i tried object_detection_ssd with below command

object_detection_sample_ssd.exe -m D:/openvino/2/frozen_inference_graph.xml -i C:\Users\LaserTrac\Desktop\la.jpg

below is the output :

[ INFO ] InferenceEngine:
API version ............ 2.1
Build .................. 2020.3.0-3467-15f2c61a-releases/2020/3
Description ....... API
my custom argc: 5
my custom argc: 00000130D90F55F0
Parsing input parameters
[ INFO ] Files were added: 1
[ INFO ] C:\Users\LaserTrac\Desktop\la.jpg
[ INFO ] Loading Inference Engine
[ INFO ] Device info:
CPU
MKLDNNPlugin version ......... 2.1
Build ........... 2020.3.0-3467-15f2c61a-releases/2020/3
[ INFO ] Loading network files:
D:/openvino/2/frozen_inference_graph.xml
D:/openvino/2/frozen_inference_graph.bin
[ INFO ] Preparing input blobs
[ INFO ] Batch size is 1
[ INFO ] Preparing output blobs

[ INFO ] Preparing output blobs -4Preparing output blobs -4 0

program exits without any error, in the line ngraphFunction->get_ops() i think it found nothing

slog::info << "Preparing output blobs" << slog::endl; OutputsDataMap outputsInfo(network.getOutputsInfo()); std::string outputName; DataPtr outputInfo; if (auto ngraphFunction = network.getFunction()) { slog::info << "Preparing output blobs -4"; int c = 0; int d = 0; for (const auto& out : outputsInfo) { slog::info << "Preparing output blobs -4 "<< c; c++; for (const auto& op : ngraphFunction->get_ops()) { slog::info << "Preparing output blobs -4 " << c << d; // here my program exits without any error d++; if (op->get_type_info() == ngraph::op::DetectionOutput::type_info && op->get_friendly_name() == out.second->getName()) { outputName = out.first; outputInfo = out.second; break; } } } } else { slog::info << "Preparing output blobs -4 2"; outputInfo = outputsInfo.begin()->second; outputName = outputInfo->getName(); }

please have a look

Re: Object detection ssd c++ sample is not working properly

samontab — Sat, 11 Jul 2020 01:04:29 GMT

You say that it works with the camera, but not with an mp4 video file.

A few ideas to try:

Make sure that the video is correctly read by the program, maybe you're missing a codec or there's some other kind of I/O problem, like the file path or permissions, etc.

Another thing it complains about is the number of channels. Have a look if the image is converted correctly to whatever is necessary, maybe it expects a greyscale image and it sends a colour image from the video, etc.

Good luck!

Re: Object detection ssd c++ sample is not working properly

AR92 — Sat, 11 Jul 2020 01:56:33 GMT

hi @samontab thanks for ur reply, there are two projects,

i will try object_detection_ssd_sync.

i was building in Debug mode so c++ sample object_detection_ssd is was not working , i switched it to Release mode its working now,

there is one more thing, i generated my IR with below command with --data_type FP16

python mo_tf.py --input_model E:\tensorflow_models\ssd_54_ob_139553\output_inference_graph_v1.pb\frozen_inference_graph.pb --tensorflow_object_detection_api_pipeline_config E:\tensorflow_models\ssd_54_ob_139553\output_inference_graph_v1.pb\pipeline.config --tensorflow_use_custom_operations_config ssd_support_api_v1.15.json --data_type FP16

i am not a c++ developer so i didn't created a new project because there adding dependency to new c++ project looks me little messy. i followed this video -> https://www.youtube.com/watch?v=_z_YYanhE2I and now .exe is working, in the code i saw FP32 in some places and i have created my IR with FP16 so do i need to change it??? actually i tried changing but then model didn't detect any thing in image. like below code

float *p = minput2Holder.as<PrecisionTrait<Precision::FP32>::value_type *>();

i changed it to

INT16 *p = minput2Holder.as<PrecisionTrait<Precision::FP16>::value_type *>();

and all occurrence of FP32 to FP16

Thanks & Regards

Amit

FP16 in my main.cpp

Re:Object detection ssd c++ sample is not working ...

Iffa_Intel — Mon, 13 Jul 2020 01:38:12 GMT

Greetings,

Please help to test with one of our MP4 video samples from here & see whether it could work:

https://github.com/intel-iot-devkit/sample-videos

Sincerely,

Iffa

Re: Re:Object detection ssd c++ sample is not working ...

AR92 — Mon, 13 Jul 2020 09:28:15 GMT

thanks, i will try it