GStreamer GPU Blob Detector Element
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The GStreamer element is called "rrcudablobdetector". This element performs the blob detector stage, described in the Overview section, with the difference that this plugin does not draw the bounding boxes, this function corresponds to another plugin called “rrmotionoverlay”. The rrcudablobdetector performs the blob detection using GPU and receives as input a bit mask GRAY8 format and outputs different formats that you can see in the capabilities section in the src template:
Main Properties
- Algorithm: With this property you can choose the algorithm to use for the blob detection. The options are:
- Ha4: HA4 connected components detection (default). Reference:
Arthur Hennequin, Lionel Lacassagne, Laurent Cabaret, Quentin Meunier. A new Direct Connected Component Labeling and Analysis Algorithms for GPUs. 2018 Conference on Design and Architectures for Signal and Image Processing (DASIP), Oct 2018, Porto, Portugal. ff10.1109/dasip.2018.8596835ff. ffhal-01923784f
- Min-area: With this property you can set the minimum normalized blob area. If the blob is smaller than this area, the blob will be discarded. By default it is “0,0006”, which is a percentage of the image area.
Capabilities
This section overviews the GPU Blob Detector input and output capabilities.
Below is the full output of the gst-inspect-1.0 command:
Factory Details:
Rank none (0)
Long-name GPU based Blob Detector
Klass Filter/Editor/Video
Description Detect blobs from a binary image
Author Melissa Montero <melissa.montero@ridgerun.com>
Plugin Details:
Name rrmotiondetection
Description Motion detection components based on OpenCV
Filename /usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstrrmotiondetection.so
Version 0.1.1
License Proprietary
Source module gstrrmotiondetection
Binary package gstrrmotiondetection
Origin URL www.ridgerun.com
GObject
+----GInitiallyUnowned
+----GstObject
+----GstElement
+----GstAggregator
+----GstCudaBaseMiso
+----GstRrCudaBlobDetector
Pad Templates:
SINK template: 'mask'
Availability: Always
Capabilities:
video/x-raw
format: GRAY8
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
Type: GstAggregatorPad
Pad Properties:
emit-signals : Send signals to signal data consumption
flags: readable, writable
Boolean. Default: false
SINK template: 'video'
Availability: Always
Capabilities:
video/x-raw(memory:NVMM)
format: { (string)I420, (string)I420_10LE, (string)P010_10LE, (string)I420_12LE, (string)UYVY, (string)YUY2, (string)YVYU, (string)NV12, (string)NV16, (string)NV24, (string)GRAY8, (string)BGRx, (string)RGBA, (string)Y42B }
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
video/x-raw
format: { (string)I420, (string)YV12, (string)YUY2, (string)UYVY, (string)AYUV, (string)VUYA, (string)RGBx, (string)BGRx, (string)xRGB, (string)xBGR, (string)RGBA, (string)BGRA, (string)ARGB, (string)ABGR, (string)RGB, (string)BGR, (string)Y41B, (string)Y42B, (string)YVYU, (string)Y444, (string)v210, (string)v216, (string)Y210, (string)Y410, (string)NV12, (string)NV21, (string)GRAY8, (string)GRAY16_BE, (string)GRAY16_LE, (string)v308, (string)RGB16, (string)BGR16, (string)RGB15, (string)BGR15, (string)UYVP, (string)A420, (string)RGB8P, (string)YUV9, (string)YVU9, (string)IYU1, (string)ARGB64, (string)AYUV64, (string)r210, (string)I420_10BE, (string)I420_10LE, (string)I422_10BE, (string)I422_10LE, (string)Y444_10BE, (string)Y444_10LE, (string)GBR, (string)GBR_10BE, (string)GBR_10LE, (string)NV16, (string)NV24, (string)NV12_64Z32, (string)A420_10BE, (string)A420_10LE, (string)A422_10BE, (string)A422_10LE, (string)A444_10BE, (string)A444_10LE, (string)NV61, (string)P010_10BE, (string)P010_10LE, (string)IYU2, (string)VYUY, (string)GBRA, (string)GBRA_10BE, (string)GBRA_10LE, (string)BGR10A2_LE, (string)GBR_12BE, (string)GBR_12LE, (string)GBRA_12BE, (string)GBRA_12LE, (string)I420_12BE, (string)I420_12LE, (string)I422_12BE, (string)I422_12LE, (string)Y444_12BE, (string)Y444_12LE, (string)GRAY10_LE32, (string)NV12_10LE32, (string)NV16_10LE32, (string)NV12_10LE40 }
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
Type: GstAggregatorPad
Pad Properties:
emit-signals : Send signals to signal data consumption
flags: readable, writable
Boolean. Default: false
SRC template: 'src'
Availability: Always
Capabilities:
video/x-raw(memory:NVMM)
format: { (string)I420, (string)I420_10LE, (string)P010_10LE, (string)I420_12LE, (string)UYVY, (string)YUY2, (string)YVYU, (string)NV12, (string)NV16, (string)NV24, (string)GRAY8, (string)BGRx, (string)RGBA, (string)Y42B }
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
video/x-raw
format: { (string)I420, (string)YV12, (string)YUY2, (string)UYVY, (string)AYUV, (string)VUYA, (string)RGBx, (string)BGRx, (string)xRGB, (string)xBGR, (string)RGBA, (string)BGRA, (string)ARGB, (string)ABGR, (string)RGB, (string)BGR, (string)Y41B, (string)Y42B, (string)YVYU, (string)Y444, (string)v210, (string)v216, (string)Y210, (string)Y410, (string)NV12, (string)NV21, (string)GRAY8, (string)GRAY16_BE, (string)GRAY16_LE, (string)v308, (string)RGB16, (string)BGR16, (string)RGB15, (string)BGR15, (string)UYVP, (string)A420, (string)RGB8P, (string)YUV9, (string)YVU9, (string)IYU1, (string)ARGB64, (string)AYUV64, (string)r210, (string)I420_10BE, (string)I420_10LE, (string)I422_10BE, (string)I422_10LE, (string)Y444_10BE, (string)Y444_10LE, (string)GBR, (string)GBR_10BE, (string)GBR_10LE, (string)NV16, (string)NV24, (string)NV12_64Z32, (string)A420_10BE, (string)A420_10LE, (string)A422_10BE, (string)A422_10LE, (string)A444_10BE, (string)A444_10LE, (string)NV61, (string)P010_10BE, (string)P010_10LE, (string)IYU2, (string)VYUY, (string)GBRA, (string)GBRA_10BE, (string)GBRA_10LE, (string)BGR10A2_LE, (string)GBR_12BE, (string)GBR_12LE, (string)GBRA_12BE, (string)GBRA_12LE, (string)I420_12BE, (string)I420_12LE, (string)I422_12BE, (string)I422_12LE, (string)Y444_12BE, (string)Y444_12LE, (string)GRAY10_LE32, (string)NV12_10LE32, (string)NV16_10LE32, (string)NV12_10LE40 }
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
Type: GstAggregatorPad
Pad Properties:
emit-signals : Send signals to signal data consumption
flags: readable, writable
Boolean. Default: false
Element has no clocking capabilities.
Element has no URI handling capabilities.
Pads:
SRC: 'src'
Pad Template: 'src'
SINK: 'video'
Pad Template: 'video'
SINK: 'mask'
Pad Template: 'mask'
Element Properties:
algorithm : The algorithm type to use for blob detection
flags: readable, writable
Enum "GstRrCudaBlobDetectorAlgorithm" Default: 0, "ha4"
(0): ha4 - HA4 connected components detection
latency : Additional latency in live mode to allow upstream to take longer to produce buffers for the current position (in nanoseconds)
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0
min-area : The minimum normalized blob area. If blob is smaller it will be discarded
flags: readable, writable
Float. Range: 0 - 1 Default: 0,0006
min-upstream-latency: When sources with a higher latency are expected to be plugged in dynamically after the aggregator has started playing, this allows overriding the minimum latency reported by the initial source(s). This is only taken into account when larger than the actually reported minimum latency. (nanoseconds)
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0
name : The name of the object
flags: readable, writable
String. Default: "rrcudablobdetector0"
parent : The parent of the object
flags: readable, writable
Object of type "GstObject"
start-time : Start time to use if start-time-selection=set
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 18446744073709551615
start-time-selection: Decides which start time is output
flags: readable, writable
Enum "GstAggregatorStartTimeSelection" Default: 0, "zero"
(0): zero - Start at 0 running time (default)
(1): first - Start at first observed input running time
(2): set - Set start time with start-time property
sync : Enable the synchronization using the incoming buffers timestamps
flags: readable, writable
Boolean. Default: false
Element Signals:
"on-new-motion" : void user_function (GstElement* object,
gchararray arg0,
gpointer user_data);