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| gboolean | display | Read / Write |
| gchar * | eyes-profile | Read / Write |
| GstOpencvFaceDetectFlags | flags | Read / Write |
| gint | min-neighbors | Read / Write |
| gint | min-size-height | Read / Write |
| gint | min-size-width | Read / Write |
| gchar * | mouth-profile | Read / Write |
| gchar * | nose-profile | Read / Write |
| gchar * | profile | Read / Write |
| gdouble | scale-factor | Read / Write |
| GstFaceDetectUpdates | updates | Read / Write |
| gint | min-stddev | Read / Write |
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstBaseTransform ╰── GstVideoFilter ╰── GstOpencvVideoFilter ╰── GstFaceDetect
Performs face detection on videos and images. If you have high cpu load you need to use videoscale with capsfilter and reduce the video resolution.
The image is scaled down multiple times using the GstFaceDetect::scale-factor until the size is <= GstFaceDetect::min-size-width or GstFaceDetect::min-size-height.
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gst-launch-1.0 autovideosrc ! decodebin ! colorspace ! facedetect ! videoconvert ! xvimagesink |
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gst-launch-1.0 autovideosrc ! video/x-raw,width=320,height=240 ! videoconvert ! facedetect min-size-width=60 min-size-height=60 ! colorspace ! xvimagesink |
plugin |
opencv |
author |
Michael Sheldon <mike@mikeasoft.com> |
class |
Filter/Effect/Video |
name |
sink |
direction |
sink |
presence |
always |
details |
video/x-raw, format=(string)RGB, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ] |
name |
src |
direction |
source |
presence |
always |
details |
video/x-raw, format=(string)RGB, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ] |
“display” property“display” gboolean
Sets whether the detected faces should be highlighted in the output.
Flags: Read / Write
Default value: TRUE
“eyes-profile” property“eyes-profile” gchar *
Location of Haar cascade file to use for eye-pair detection.
Flags: Read / Write
Default value: "/usr/share/opencv/haarcascades/haarcascade_mcs_eyepair_small.xml"
“flags” property “flags” GstOpencvFaceDetectFlags
Flags to cvHaarDetectObjects.
Flags: Read / Write
Default value: Do Canny edge detection to discard some regions
“min-neighbors” property“min-neighbors” gint
Minimum number (minus 1) of neighbor rectangles that makes up an object.
Flags: Read / Write
Allowed values: >= 0
Default value: 3
“min-size-height” property“min-size-height” gint
Minimum area height to be recognized as a face.
Flags: Read / Write
Allowed values: >= 0
Default value: 30
“min-size-width” property“min-size-width” gint
Minimum area width to be recognized as a face.
Flags: Read / Write
Allowed values: >= 0
Default value: 30
“mouth-profile” property“mouth-profile” gchar *
Location of Haar cascade file to use for mouth detection.
Flags: Read / Write
Default value: "/usr/share/opencv/haarcascades/haarcascade_mcs_mouth.xml"
“nose-profile” property“nose-profile” gchar *
Location of Haar cascade file to use for nose detection.
Flags: Read / Write
Default value: "/usr/share/opencv/haarcascades/haarcascade_mcs_nose.xml"
“profile” property“profile” gchar *
Location of Haar cascade file to use for face detection.
Flags: Read / Write
Default value: "/usr/share/opencv/haarcascades/haarcascade_frontalface_default.xml"
“scale-factor” property“scale-factor” gdouble
Factor by which the frame is scaled after each object scan.
Flags: Read / Write
Allowed values: [1.1,10]
Default value: 1.25
“updates” property“updates” GstFaceDetectUpdates
When send update bus messages, if at all.
Flags: Read / Write
Default value: Send update messages on every frame
“min-stddev” property“min-stddev” gint
Minimum image average standard deviation: on images with standard deviation lesser than this value facedetection will not be performed. Setting this property help to save cpu and reduce false positives not performing face detection on images with little changes.
Flags: Read / Write
Allowed values: [0,255]
Default value: 0