Add C++ demos (Updated on 2024-06-03)

[fengyuentau]

We have provided at least one easy and clean Python demo for every model here in the zoo. As described in #132, Python demos sometimes can be too concise to be converted to other languages, such as C++. Hence, we decide to add C++ demos as well but they should be clean and simple enough to show how to run inference and get expected output with OpenCV.

We welcome contributions from community. Please take a look at the list below and leave comments for application or discussion before you start to dive in coding.

Status	Task	Models
✅ Done #138	Face Detection	YuNet
✅ Done #259	Face Recognition	SFace
✅ Done #177	Object Detection	YOLOX
✅ Done #232	Object Detection	NanoDet
✅ Done #175	Text Detection	DB
✅ Done #176	Text Recognition	CRNN (CN)
✅ Done #176	Text Recognition	CRNN (EN)
✅ Done #176	Text Recognition	CRNN (CH)
✅ Done #241	Image Classification	PP-ResNet50
✅ Done #171	Image Classification	MobileNet V1
✅ Done #171	Image Classification	MobileNet V2
✅ Done #243	Human Segmentation	PP-HumanSeg
✅ Done #279	QR Code Detection / Parsing	WeChatQRCode
✅ Done #277	Person Re-Identification	YoutuReID
✅ Done #282	Palm Detection	MP-PalmDet
❗️ Need Contribution	Hand Pose Estimation	MP-HandPose
✅ Done #179	Person Detection	MP-PersonDet
✅ Done #186	Pose Estimation	MP-Pose
✅ Done #233	Facial Expression Recognition	FER
✅ Done #240	Object Tracking	VitTrack

[kekxv]

handpose_estimation_mediapipe. please
Thank you so much.

[dmatveev]

If we revive DNN backend in G-API, it may make sense to write the C++ demos directly in G-API to combine Video, NN, Pre&Post processing all in the same pipeline effectively. Additional points to OpenCV as an application framework. What do you think?

cc: @vpisarev

[fengyuentau]

It would be good to provide additional demos in G-API to construct a complete end-to-end pipeline. But first we need to have DNN backend in G-API, which is not implemented yet right?

cc @ShiqiYu

[LaurentBerger]

@fengyuentau I can manage MobileNet V1 Are you agree?

[fengyuentau]

@LaurentBerger No problems. Pull requests are welcome.

[LaurentBerger]

About DaSiamRPN there is already an example Model source: opencv/samples/dnn/diasiamrpn_tracker.cpp

[fengyuentau]

About DaSiamRPN there is already an example Model source: opencv/samples/dnn/diasiamrpn_tracker.cpp

Yes, but we are going to replace it. We have two GSoC projects ongoing for training a better but also lighter object trackers.

[LaurentBerger]

Yes, but we are going to replace it. We have two GSoC projects ongoing for training a better but also lighter object trackers.

May be it should be mark as in progress