[Bf-docboard-svn] bf-manual: [7454] trunk/blender_docs/manual/movie_clip/tracking/clip/editing: Cleanup Clip Editing
Aaron Carlisle
noreply at blender.org
Wed Dec 2 07:08:14 CET 2020
Revision: 7454
https://developer.blender.org/rBM7454
Author: Blendify
Date: 2020-12-02 07:08:14 +0100 (Wed, 02 Dec 2020)
Log Message:
-----------
Cleanup Clip Editing
Modified Paths:
--------------
trunk/blender_docs/manual/movie_clip/tracking/clip/editing/solve.rst
trunk/blender_docs/manual/movie_clip/tracking/clip/editing/track.rst
Modified: trunk/blender_docs/manual/movie_clip/tracking/clip/editing/solve.rst
===================================================================
--- trunk/blender_docs/manual/movie_clip/tracking/clip/editing/solve.rst 2020-12-01 22:43:48 UTC (rev 7453)
+++ trunk/blender_docs/manual/movie_clip/tracking/clip/editing/solve.rst 2020-12-02 06:08:14 UTC (rev 7454)
@@ -5,8 +5,8 @@
.. _clip-tracking-plane:
-Plane Track Panel
-=================
+Plane Track
+===========
The *Create Plane Track* operator creates a new plane track.
Planar tracking takes advantage of the fact that there are often planar surfaces in footage,
@@ -32,32 +32,27 @@
the :doc:`/compositing/types/distort/plane_track_deform` compositing node.
-Solve Panel
-===========
+Solve
+=====
Tripod
-------
+ Tripod Motion can be used for footage where the camera does not move and only rotates.
+ Such footage can't be tracked with a generic solver approach, and
+ it is impossible to determine the actual feature points in space due to a lack of information.
+ So this solver will solve only the relative camera rotation and then reproject the feature points into a sphere,
+ with the same distance between feature and camera for all feature points.
-Tripod Motion can be used for footage where the camera does not move and only rotates.
-Such footage can't be tracked with a generic solver approach, and
-it is impossible to determine the actual feature points in space due to a lack of information.
-So this solver will solve only the relative camera rotation and then reproject the feature points into a sphere,
-with the same distance between feature and camera for all feature points.
+ .. note::
-.. note::
+ This is special type of camera solver and it behaves different from regular solver.
+ It means using more tracks doesn't imply more accurate solution.
+ Having 5-10 tracks on frame is likely what shall be commonly used for this kind of solver.
- This is special type of camera solver and it behaves different from regular solver.
- It means using more tracks doesn't imply more accurate solution.
- Having 5-10 tracks on frame is likely what shall be commonly used for this kind of solver.
-
-
Keyframe
---------
-
-Keyframe
Automatically select keyframes for initial reconstruction.
This option enables complex algorithms which tries to find a keyframe pair
with minimal reconstruction error and best scene scale guess.
+
Keyframe A, B :kbd:`Q`, :kbd:`E`
Start (A) and End (B) frame of the range used for reconstruction.
@@ -94,8 +89,8 @@
.. (todo 2.62) object solver
-Cleanup Panel
-=============
+Cleanup
+=======
This panel contains operators and their settings which are needed to clean up bad tracks:
tracks which are not tracked long enough or which failed to reconstruct accurately.
@@ -102,12 +97,14 @@
Frames
Tracks or tracked segments shorter than this number of frames will be removed.
+
Error
Tracks which has reprojection error higher than this value will be removed.
-Action
+
+Type
Several actions can be performed for bad tracks:
- Selected
+ Select
They can simply be selected.
Delete Track
The whole track can be deleted.
@@ -122,8 +119,8 @@
Additionally, it identifies tracks which has suspicious spikes in their motion and selects them.
-Geometry Panel
-==============
+Geometry
+========
3D Markers to Mesh
Creates a mesh which vertices matches positions of reconstructed tracks.
@@ -130,12 +127,13 @@
It is required to have motion solved first before using this operator.
Only tracks from the current tracking object will be used.
The intention of this operator is to give a nice starting point for a manual mesh reconstruction.
+
Link Empty to Track
Creates new empty in 3D Viewport and appends constraint which parts it to the active track.
-Orientation Panel
-=================
+Orientation
+===========
Scene orientation tools can be used for orienting object to bundles.
@@ -142,19 +140,25 @@
Floor
Use selected three markers to define a floor. Camera will be transformed in a way which makes the selected
markers to be flat (have Z = 0).
+
Wall
Similar to the floor orientation, but defines a wall (selected tracks are placed onto OXZ plane).
+
Set Origin
Transform camera in a way which makes active track to be moved to a scene origin.
Only translation is applied to the camera.
+
Set X, Y Axis
Transform camera in a way which makes active track to become on X or Y axis. No translation is applied, meaning
scene origin which was specified before will be preserved.
+
Set Scale
Scale camera or tracking object in a way which makes distance between two selected tracks match the given value in
Distance.
+
Apply Scale
Similar to Set Scale, but actually modifies the tracking data.
+
Distance
Distance in active scene units which is used by Set/Apply scale.
@@ -165,6 +169,7 @@
Set as Background
Sets the clip currently being edited as the camera background for all visible 3D Views.
If there is no visible 3D Views or the Clip Editor is open in full screen, nothing will happen.
+
Setup Tracking Scene
Performs all usual steps to set up a VFX scene:
Modified: trunk/blender_docs/manual/movie_clip/tracking/clip/editing/track.rst
===================================================================
--- trunk/blender_docs/manual/movie_clip/tracking/clip/editing/track.rst 2020-12-01 22:43:48 UTC (rev 7453)
+++ trunk/blender_docs/manual/movie_clip/tracking/clip/editing/track.rst 2020-12-02 06:08:14 UTC (rev 7454)
@@ -3,21 +3,23 @@
Track
*****
-Clip Panel
-==========
+Clip
+====
+Set Scene Frames
+ Sets end scene frame to match current clip duration.
+
Prefetch :kbd:`P`
Fills cache with frames. As many frames as fits into cache are load form the drive.
This allows to fill in the cache as fast as possible when you really need to track something,
but this keeps CPU and drive bandwidth idle if you've got Clip editor opened but not actually interacting with it.
+
Reload
Force reload currently loaded movie clip. Is mainly useful when clip gets edited outside of Blender.
-Set Scene Frames
- Sets end scene frame to match current clip duration.
-Marker Panel
-============
+Marker
+======
Add
Places a new marker at the position of the mouse
@@ -77,19 +79,17 @@
.. _clip-tracking-settings:
-Tracking Settings Panel
-=======================
+Tracking Settings
+=================
This panel contains all settings for the 2D tracking algorithms.
+Preset tracking settings can be configured in the panel header.
+These presets are based on tracking experience of real footage and
+provides good start values to begin working with a specific footage.
-Tracking Presets
- These presets are based on tracking experience of real footage and
- provides good start values to begin working with a specific footage.
-Pattern Size, Search
+Pattern Size, Search Size
Defines size of a newly created tracks.
-Channels
- Defines color channels which will be used by a tracking algorithm.
- Disabling some colors might increase the contrast to enhance the feature detection.
+
Motion Model
Defines which possible motions tracking feature has. This option should be set depending on
which motion a particular feature has and it will make tracking most accurate for such a motion.
@@ -99,8 +99,9 @@
Perspective
Is usually used to track a planar feature,
but often *Affine* is a good enough approximation and may have more stable tracks.
-Pattern Match
- Pattern Match controls which patterns get tracked; to be more precise,
+
+Match
+ Controls which patterns get tracked; to be more precise,
the pattern from which frame is getting tracked. Here is an example which should make things clearer.
The tracker algorithm receives two images inside the search area and the position of a point
@@ -125,13 +126,20 @@
In this configuration the pattern is tracking between two neighboring frames.
It allows dealing with cases of large transformations of the feature point
but can lead to sliding from the original position, so it should be controlled.
+
Prepass
Enables a two pass tracking, where the first pass is a brute force tracking of location only, and
the second pass will use tracking of the full motion model refining the first pass.
+
Normalize
Means patterns will be normalized by their average intensity while tracking,
to make them invariant to illumination changes. An example where this is useful is a scene where
a marker moves in the shadow of an object.
+
+R, G, B
+ Defines color channels which will be used by a tracking algorithm.
+ Disabling some colors might increase the contrast to enhance the feature detection.
+
Copy from Active Track
Copies all settings from active track. Allows to ease creation of new tracks with the same setting.
@@ -138,26 +146,31 @@
.. (alt) Previous frame: An image created from the current frame is sent as first image to the tracker.
-Extra Settings
---------------
+Tracking Extra Settings
+-----------------------
Weight
See Track :ref:`Weight <clip-tracking-weight>`.
+
Correlation
This value defines the minimal correlation between
a matched pattern and a reference to be considered a successful tracking.
If the tracker is stops too early, decrease this value, or if the track is slipping too much
when it should stop sooner, increase this value.
+
Margin
Can be used disable tracks when they become too close to the image boundary.
This slider sets "too close" in pixels.
+
Use Mask
Allows to use annotation tool to mask part of a pattern, narrowing down what the tracker algorithm is
attempting to match across frames.
+
Frames Limit
Controls how many frames can be tracked when the Track Sequence operator is called.
So, each Track Sequence operation would track maximum *Frames Limit* frames.
This also helps to notice a slide-off of tracks and correct them.
+
Speed
Marker settings only -- Can be used to control the speed of sequence tracking.
This option does not affect the quality of tracking; it just helps to control if tracking happens accurately.
@@ -167,11 +180,11 @@
adjust positions of tracks.
-Track Panel
-===========
+Track
+=====
-Tracks
-------
+Track
+-----
@@ Diff output truncated at 10240 characters. @@
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