# 目标检测

在对模型执行 pipeline 命令之前，请确保遵循所需的[先决条件](https://docs.qualcomm.com/doc/80-70017-15BY/topic/ai-hub-qualcomm-im-sdk.html#prerequisites)。

运行以下命令以确保您的结果显示在连接的显示器上。

export XDG_RUNTIME_DIR=/dev/socket/weston && export WAYLAND_DISPLAY=wayland-1
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## Yolo-V7 Quantized

- 模型：[Yolo-v7-Quantized.tflite](https://aihub.qualcomm.com/iot/models/yolov7_quantized)
- 标签：[coco_labels.txt](https://github.com/quic/ai-hub-models/blob/main/qai_hub_models/labels/coco_labels.txt)

gst-launch-1.0 -e --gst-debug=2 \
    filesrc location=/opt/video.mp4 ! qtdemux ! queue ! h264parse ! v4l2h264dec capture-io-mode=5 output-io-mode=5 ! queue ! tee name=split \
    split. ! queue ! qtivcomposer name=mixer ! queue ! waylandsink fullscreen=true \
    split. ! queue ! qtimlvconverter ! queue ! qtimltflite delegate=external external-delegate-path=libQnnTFLiteDelegate.so \
    external-delegate-options="QNNExternalDelegate,backend_type=htp;" model=/opt/Yolo-v7-Quantized.tflite ! queue ! \
    qtimlvdetection threshold=50.0 results=10 module=yolov8 labels=/opt/coco_labels.txt constants="YOLOv7,q-offsets=<35.0, 0.0, 0.0>,q-scales=<3.4220554, 0.0023370725102722645, 1.0>;" ! \
    video/x-raw,format=BGRA,width=640,height=360 ! queue ! mixer.
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## Yolov8-Detection-Quantized

- 模型：[YOLOv8-Detection-Quantized.tflite](https://aihub.qualcomm.com/iot/models/yolov8_det_quantized)
- 标签：[coco_labels.txt](https://github.com/quic/ai-hub-models/blob/main/qai_hub_models/labels/coco_labels.txt)

gst-launch-1.0 -e --gst-debug=2 \
    filesrc location=/opt/video.mp4 ! qtdemux ! queue ! h264parse ! v4l2h264dec capture-io-mode=5 output-io-mode=5 ! queue ! tee name=split \
    split. ! queue ! qtivcomposer name=mixer ! queue ! waylandsink fullscreen=true \
    split. ! queue ! qtimlvconverter ! queue ! qtimltflite delegate=external external-delegate-path=libQnnTFLiteDelegate.so \
    external-delegate-options="QNNExternalDelegate,backend_type=htp,htp_device_id=(string)0,htp_performance_mode=(string)2,htp_precision=(string)1;" model=/opt/YOLOv8-Detection-Quantized.tflite ! queue ! \
    qtimlvdetection threshold=50.0 results=10 module=yolov8 labels=/opt/coco_labels.txt constants="YOLOv8,q-offsets=<21.0, 0.0, 0.0>,q-scales=<3.093529462814331, 0.00390625, 1.0>;" ! \
    video/x-raw,format=BGRA,width=640,height=360 ! queue ! mixer.
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Note

在上述命令中的 `external-delegate-options` 中添加 `htp_device_id=(string)0,htp_performance_mode=(string)2,htp_precision=(string)1` 允许模型在 HTP 上以高性能模式运行。

可以用相同方式为所有其他pipeline启用高性能模式。

## Yolo-nas-Quantized

- 模型：[Yolo-NAS-Quantized.tflite](https://aihub.qualcomm.com/iot/models/yolonas_quantized)
- 标签：[coco_labels.txt](https://github.com/quic/ai-hub-models/blob/main/qai_hub_models/labels/coco_labels.txt)

gst-launch-1.0 -e --gst-debug=2 \
    filesrc location=/opt/video.mp4 ! qtdemux ! queue ! h264parse ! v4l2h264dec capture-io-mode=5 output-io-mode=5 ! queue ! tee name=split \
    split. ! queue ! qtivcomposer name=mixer ! queue ! waylandsink fullscreen=true \
    split. ! queue ! qtimlvconverter ! queue ! qtimltflite delegate=external external-delegate-path=libQnnTFLiteDelegate.so \
    external-delegate-options="QNNExternalDelegate,backend_type=htp;" model=/opt/Yolo-NAS-Quantized.tflite ! queue ! \
    qtimlvdetection threshold=50.0 results=10 module=yolov8 labels=/opt/coco_labels.txt constants="yolo-nas,q-offsets=<37.0,0.0, 0.0>,q-scales=<3.416602611541748, 0.00390625, 1.0>;" ! \
    video/x-raw,format=BGRA,width=640,height=360 ! queue ! mixer.
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Last Published: Jan 25, 2026

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