cameracalibrate

Performs camera calibration by having it point at a chessboard pattern using upstream/downstream cameraundistort

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseTransform
                    ╰──GstVideoFilter
                        ╰──GstOpencvVideoFilter
                            ╰──cameracalibrate

Factory details

Authors: – Philippe Renon

Classification: – Filter/Effect/Video

Rank – none

Plugin – opencv

Package – GStreamer Bad Plug-ins

Pad Templates

sink

video/x-raw:
         format: RGBx
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: xRGB
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: BGRx
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: xBGR
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: RGBA
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: ARGB
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: BGRA
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: ABGR
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: RGB
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: BGR
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: GRAY8
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

src

video/x-raw:
         format: RGBx
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: xRGB
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: BGRx
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: xBGR
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: RGBA
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: ARGB
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: BGRA
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: ABGR
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: RGB
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: BGR
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
video/x-raw:
         format: GRAY8
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – src

Object type – GstPad

Properties

aspect-ratio 

“aspect-ratio” gfloat

The aspect ratio

Flags : Read / Write

Default value : 1

board-height 

“board-height” gint

The board height in number of items (e.g. number of squares for chessboard)

Flags : Read / Write

Default value : 6

board-width 

“board-width” gint

The board width in number of items (e.g. number of squares for chessboard)

Flags : Read / Write

Default value : 9

center-principal-point 

“center-principal-point” gboolean

Fix the principal point at the center

Flags : Read / Write

Default value : false

corner-sub-pixel 

“corner-sub-pixel” gboolean

Improve corner detection accuracy for chessboard

Flags : Read / Write

Default value : true

delay 

“delay” gint

Sampling periodicity in ms

Flags : Read / Write

Default value : 350

frame-count 

“frame-count” gint

The number of frames to use from the input for calibration

Flags : Read / Write

Default value : 25

pattern 

“pattern” Camera-calibration-pattern *

One of the chessboard, circles, or asymmetric circle pattern

Flags : Read / Write

Default value : chessboard (0)

settings 

“settings” gchararray

Camera correction parameters (opaque string of serialized OpenCV objects)

Flags : Read

Default value : NULL

show-corners 

“show-corners” gboolean

Show corners

Flags : Read / Write

Default value : true

square-size 

“square-size” gfloat

The size of a square in your defined unit (point, millimeter, etc.)

Flags : Read / Write

Default value : 50

use-fisheye 

“use-fisheye” gboolean

Use fisheye camera model for calibration

Flags : Read / Write

Default value : false

zero-tangent-distorsion 

“zero-tangent-distorsion” gboolean

Assume zero tangential distortion

Flags : Read / Write

Default value : false

Named constants

Camera-calibration-pattern

Members

chessboard (0) – Chessboard
circle_grids (1) – Circle Grids
asymmetric_circle_grids (2) – Asymmetric Circle Grids

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