Changeset View
Changeset View
Standalone View
Standalone View
manual/editors/movie_clip_editor/tracking/clip/properties.rst
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| so a high contrast between the feature and its background yields more accurate tracking. | so a high contrast between the feature and its background yields more accurate tracking. | ||||
| In such cases disabling some color channels can help. | In such cases disabling some color channels can help. | ||||
| When several tracks are used for 3D camera reconstruction or for 2D stabilization, it is possible | |||||
| to assign a reduced weight to some tracks to control their influence on the solution result. | |||||
| The *Weight* parameter is used for 3D reconstruction, while the *Stab Weight* parameter is used | |||||
| to control 2D stabilization. This parameter can (and often need to be) animated. | |||||
| The last thing is custom color, and the preset for it. | The last thing is custom color, and the preset for it. | ||||
| This setting overrides the default marker color used in the clip editor and 3D View, | This setting overrides the default marker color used in the clip editor and 3D View, | ||||
| and it helps to distinguish different type of features (for example, | and it helps to distinguish different type of features (for example, | ||||
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| features in the background vs. foreground and so on). Color also can be used for "grouping" | features in the background vs. foreground and so on). Color also can be used for "grouping" | ||||
| tracks so a whole group of tracks can be selected by color using the Select Grouped operator. | tracks so a whole group of tracks can be selected by color using the Select Grouped operator. | ||||
| .. tip:: | .. tip:: | ||||
| To select good points for tracking, use points in the middle of the footage timeline | To select good points for tracking, use points in the middle of the footage timeline | ||||
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| Toggles the auto-keyframing for corners of the plane track. | Toggles the auto-keyframing for corners of the plane track. | ||||
| With this enabled, keyframes will automatically get inserted when any corner is moved. | With this enabled, keyframes will automatically get inserted when any corner is moved. | ||||
| .. note:: | .. note:: Corners can be moved using :kbd:`LMB`. | ||||
| Corners can be moved using :kbd:`LMB`. | |||||
| Image | Image | ||||
| Used to select an image which will be inside the plane track. | Used to select an image which will be inside the plane track. | ||||
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| This panel contains all settings which control things displayed in the clip editor. | This panel contains all settings which control things displayed in the clip editor. | ||||
| R, G, B | R, G, B | ||||
| And *B/W* buttons at the top of this panel are used to control color channels used for frame preview and to | And *B/W* buttons at the top of this panel are used to control color channels used for frame preview and to | ||||
| make the whole frame gray scale. It is needed because the tracking algorithm works with gray-scale images and it | make the whole frame gray scale. It is needed because the tracking algorithm works with gray-scale images and it | ||||
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| Applies the distortion model for grease pencil strokes (available in distortion mode only). | Applies the distortion model for grease pencil strokes (available in distortion mode only). | ||||
| This option also helps to perform manual calibration. | This option also helps to perform manual calibration. | ||||
| A more detailed description of this process will be added later. | A more detailed description of this process will be added later. | ||||
| Stable | Display Stabilization | ||||
| This option makes the displayed frame be affected by the 2D stabilization settings | This option makes the displayed frame be affected by the 2D stabilization settings | ||||
| (available in reconstruction mode only). | (available in reconstruction mode only). | ||||
| It is only a preview option, which does not actually change the footage itself. | It is only a preview option, which does not actually change the footage itself. | ||||
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| 2D Stabilization Panel. | 2D Stabilization Panel. | ||||
| There is one extra panel which is available in reconstruction mode -- 2D Stabilization Panel. | |||||
| The purpose of this feature is to smooth out jerky camera handling on existing real world footage. | |||||
| To activate the 2D stabilizer, you need to set the toggle in the panel, and additionally you need to enable | |||||
| *Display Stabilization* in the Display panel. | |||||
| Then you'll need to set up some tracking points to detect the image movements. | |||||
| This panel is used to define data used for 2D stabilization of the shot. | The 2D Stabilization panel is used to define the data used for 2D stabilization of the shot. | ||||
| Several options are available in this panel: you may add a list of tracks to determine lateral image shifts | |||||
| and another list of tracks to determine tilting and zooming movements. | |||||
| Based on the average contribution of these tracks, a compensating movement is calculated and applied to each frame. | |||||
| Anchor Frame | When the footage includes panning and traveling movements, the stabilizer tends to push the image out of the | ||||
| Reference point to anchor stabilization (other frames will be adjusted relative to the frames position). | visible area. This can be compensated by animating the parameters for the intentional, "expected" camera movement. | ||||
| Stabilization Type | See the :doc:`Stabilization </editors/movie_clip_editor/tracking/clip/stabilization>` | ||||
| Rotation | page for detailed description of image stabilization parameters and workflow. | ||||
| Stabilizes detected rotation around center of frame. | |||||
| Scale | |||||
| Compensates any scale changes relative to center of rotation. | |||||
| Tracks For Stabilization | |||||
| Location | |||||
| List of tracks to be used to compensate for camera jumps, or location. | |||||
| It works in the following way: it gets tracks from the list of tracks used for location | |||||
| stabilization and finds the median point of all these tracks on the first frame. | |||||
| On each frame, the algorithm makes this point have the same position in screen coordinates by | |||||
| moving the whole frame. | |||||
| Rotation/Scale | |||||
| List of tracks to be used to compensate for camera tilts, it works in the following way. | |||||
| On first frame of the movie, this track is connected with the median point of the tracks from | |||||
| list above and angle between horizon and this segment is kept constant through the whole footage. | |||||
| Autoscale | |||||
| Finds smallest scale factor which, when applied to the footage, | |||||
| would eliminate all the black holes near the image boundaries. | |||||
| Used for when the camera jumps a lot and has noticeable black areas near image boundaries. | |||||
| Max | |||||
| Limits the amount of automatic scaling. | |||||
| Relative Offset X/Y | |||||
| Known relative offset of original shot, will be subtracted (e.g. for panning shot, can be animated). | |||||
| Expected Rotation | |||||
| Rotation present on original shot, will be compensated (e.g. for deliberate tilting). | |||||
| Expected Zoom | |||||
| Explicitly scale resulting frame to compensate zoom of original shot. | |||||
| Influence | |||||
| The amount of transformation applied to the footage can be controlled. | |||||
| In some cases it is not necessary to fully compensate camera jumps. | |||||
| Interpolate | |||||
| Nearest | |||||
| No interpolation, uses nearest neighboring pixel. | |||||
| Bilinear | |||||
| Simple interpolation between adjacent pixels. | |||||
| Bicubic | |||||
| Highest quality interpolation. | |||||
| Grease Pencil Panel | Grease Pencil Panel | ||||
| =================== | =================== | ||||
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