NVIDIA VPI GStreamer Plug-in/Examples/Overlay: Difference between revisions
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{{NVIDIA VPI GStreamer Plug-in/Head|previous=Examples/Perspective Warp|next=Examples/Videoconvert| | {{NVIDIA VPI GStreamer Plug-in/Head|previous=Examples/Perspective Warp|next=Examples/Videoconvert|metakeywords=vpioverlay, vpiharrisdetector, vpiklttracker, vpiharrisdetector}} | ||
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The following example pipe will draw key points and corners detected with the vpiharrisdetector element in your input video stream. You may modify the properties values according to the information above. | The following example pipe will draw key points and corners detected with the vpiharrisdetector element in your input video stream. You may modify the properties values according to the information above. | ||
< | <syntaxhighlight lang="bash"> | ||
gst-launch-1.0 nvarguscamerasrc ! nvvidconv ! 'video/x-raw,format=GRAY8' ! vpiupload ! vpiharrisdetector gradient-size=3 block-size=3 nms-distance=8 sensitivity=0.01 strength-thresh=20 ! vpioverlay color=white ! vpidownload ! nvvidconv ! 'video/x-raw(memory:NVMM),format=I420' ! nvoverlaysink | gst-launch-1.0 nvarguscamerasrc ! nvvidconv ! 'video/x-raw,format=GRAY8' ! vpiupload ! vpiharrisdetector gradient-size=3 block-size=3 nms-distance=8 sensitivity=0.01 strength-thresh=20 ! vpioverlay color=white ! vpidownload ! nvvidconv ! 'video/x-raw(memory:NVMM),format=I420' ! nvoverlaysink | ||
</ | </syntaxhighlight> | ||
< | <syntaxhighlight lang="bash"> | ||
gst-launch-1.0 nvarguscamerasrc ! nvvidconv bl-output=false ! 'video/x-raw(memory:NVMM),format=GRAY8' ! vpiupload ! vpiharrisdetector gradient-size=3 block-size=3 nms-distance=8 sensitivity=0.01 strength-thresh=20 ! vpioverlay color=white ! vpidownload ! nvvidconv ! 'video/x-raw(memory:NVMM),format=I420' ! nvoverlaysink | gst-launch-1.0 nvarguscamerasrc ! nvvidconv bl-output=false ! 'video/x-raw(memory:NVMM),format=GRAY8' ! vpiupload ! vpiharrisdetector gradient-size=3 block-size=3 nms-distance=8 sensitivity=0.01 strength-thresh=20 ! vpioverlay color=white ! vpidownload ! nvvidconv ! 'video/x-raw(memory:NVMM),format=I420' ! nvoverlaysink | ||
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Alternative display pipeline. | |||
<syntaxhighlight lang="bash"> | |||
gst-launch-1.0 nvarguscamerasrc ! nvvidconv bl-output=false ! 'video/x-raw(memory:NVMM),format=GRAY8' ! vpiupload ! vpiharrisdetector gradient-size=3 block-size=3 nms-distance=8 sensitivity=0.01 strength-thresh=20 ! vpioverlay color=white ! vpidownload ! nvvidconv ! 'video/x-raw(memory:NVMM),format=I420' ! nvvidconv ! autovideosink | |||
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{{NVIDIA VPI GStreamer Plug-in/Foot|Examples/Perspective Warp|Examples/Videoconvert }} | {{NVIDIA VPI GStreamer Plug-in/Foot|Examples/Perspective Warp|Examples/Videoconvert}} | ||
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Latest revision as of 15:36, 14 August 2024
| GstVPI |
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Introduction
The vpioverlay element draws boxes over the image from the metadata produced by the vpiharrisdetector and vpiklttracker elements. In the case of vpiharrisdetector it computes a small box around each detected keypoint.
Element properties
- color
Color to draw the boxes. Available options:
- black: Black color for boxes
- white: White color for boxes
Flags: readable, writable
Default: "black"
Example
The following example pipe will draw key points and corners detected with the vpiharrisdetector element in your input video stream. You may modify the properties values according to the information above.
gst-launch-1.0 nvarguscamerasrc ! nvvidconv ! 'video/x-raw,format=GRAY8' ! vpiupload ! vpiharrisdetector gradient-size=3 block-size=3 nms-distance=8 sensitivity=0.01 strength-thresh=20 ! vpioverlay color=white ! vpidownload ! nvvidconv ! 'video/x-raw(memory:NVMM),format=I420' ! nvoverlaysink
gst-launch-1.0 nvarguscamerasrc ! nvvidconv bl-output=false ! 'video/x-raw(memory:NVMM),format=GRAY8' ! vpiupload ! vpiharrisdetector gradient-size=3 block-size=3 nms-distance=8 sensitivity=0.01 strength-thresh=20 ! vpioverlay color=white ! vpidownload ! nvvidconv ! 'video/x-raw(memory:NVMM),format=I420' ! nvoverlaysink
Alternative display pipeline.
gst-launch-1.0 nvarguscamerasrc ! nvvidconv bl-output=false ! 'video/x-raw(memory:NVMM),format=GRAY8' ! vpiupload ! vpiharrisdetector gradient-size=3 block-size=3 nms-distance=8 sensitivity=0.01 strength-thresh=20 ! vpioverlay color=white ! vpidownload ! nvvidconv ! 'video/x-raw(memory:NVMM),format=I420' ! nvvidconv ! autovideosink