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## 3D Human Pose Demo
<img src="https://user-images.githubusercontent.com/15977946/118820606-02df2000-b8e9-11eb-9984-b9228101e780.gif" width="600px" alt><br>
### 3D Human Pose Two-stage Estimation Image Demo
#### Using ground truth 2D poses as the 1st stage (pose detection) result, and inference the 2nd stage (2D-to-3D lifting)
We provide a demo script to test on single images with a given ground-truth Json file.
```shell
python demo/body3d_two_stage_img_demo.py \
${MMPOSE_CONFIG_FILE_3D} \
${MMPOSE_CHECKPOINT_FILE_3D} \
--json-file ${JSON_FILE} \
--img-root ${IMG_ROOT} \
--only-second-stage \
[--show] \
[--device ${GPU_ID or CPU}] \
[--out-img-root ${OUTPUT_DIR}] \
[--rebase-keypoint-height] \
[--show-ground-truth]
```
Example:
```shell
python demo/body3d_two_stage_img_demo.py \
configs/body/3d_kpt_sview_rgb_img/pose_lift/h36m/simplebaseline3d_h36m.py \
https://download.openmmlab.com/mmpose/body3d/simple_baseline/simple3Dbaseline_h36m-f0ad73a4_20210419.pth \
--json-file tests/data/h36m/h36m_coco.json \
--img-root tests/data/h36m \
--camera-param-file tests/data/h36m/cameras.pkl \
--only-second-stage \
--out-img-root vis_results \
--rebase-keypoint-height \
--show-ground-truth
```
### 3D Human Pose Two-stage Estimation Video Demo
#### Using mmdet for human bounding box detection and top-down model for the 1st stage (2D pose detection), and inference the 2nd stage (2D-to-3D lifting)
Assume that you have already installed [mmdet](https://github.com/open-mmlab/mmdetection).
```shell
python demo/body3d_two_stage_video_demo.py \
${MMDET_CONFIG_FILE} \
${MMDET_CHECKPOINT_FILE} \
${MMPOSE_CONFIG_FILE_2D} \
${MMPOSE_CHECKPOINT_FILE_2D} \
${MMPOSE_CONFIG_FILE_3D} \
${MMPOSE_CHECKPOINT_FILE_3D} \
--video-path ${VIDEO_PATH} \
[--rebase-keypoint-height] \
[--norm-pose-2d] \
[--num-poses-vis NUM_POSES_VIS] \
[--show] \
[--out-video-root ${OUT_VIDEO_ROOT}] \
[--device ${GPU_ID or CPU}] \
[--det-cat-id DET_CAT_ID] \
[--bbox-thr BBOX_THR] \
[--kpt-thr KPT_THR] \
[--use-oks-tracking] \
[--tracking-thr TRACKING_THR] \
[--euro] \
[--radius RADIUS] \
[--thickness THICKNESS]
```
Example:
```shell
python demo/body3d_two_stage_video_demo.py \
demo/mmdetection_cfg/faster_rcnn_r50_fpn_coco.py \
https://download.openmmlab.com/mmdetection/v2.0/faster_rcnn/faster_rcnn_r50_fpn_1x_coco/faster_rcnn_r50_fpn_1x_coco_20200130-047c8118.pth \
configs/body/2d_kpt_sview_rgb_img/topdown_heatmap/coco/hrnet_w48_coco_256x192.py \
https://download.openmmlab.com/mmpose/top_down/hrnet/hrnet_w48_coco_256x192-b9e0b3ab_20200708.pth \
configs/body/3d_kpt_sview_rgb_vid/video_pose_lift/h36m/videopose3d_h36m_243frames_fullconv_supervised_cpn_ft.py \
https://download.openmmlab.com/mmpose/body3d/videopose/videopose_h36m_243frames_fullconv_supervised_cpn_ft-88f5abbb_20210527.pth \
--video-path demo/resources/<demo_body3d>.mp4 \
--out-video-root vis_results \
--rebase-keypoint-height
```
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