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# -*- coding:utf-8 -*-
# ***** GPL LICENSE BLOCK *****
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# All rights reserved.
# ***** GPL LICENSE BLOCK *****
bl_info = {
"name": "Refine tracking solution",
"author": "Stephen Leger",
"license": "GPL",
"version": (1, 1, 1),
"blender": (2, 7, 8),
"location": "Clip Editor > Tools > Solve > Refine Solution",
"description": "Refine motion solution by setting track weight according reprojection error",
"warning": "",
"wiki_url": "https://github.com/s-leger/blenderTracking/wiki",
"tracker_url": "https://github.com/s-leger/blenderTracking/issues",
"support": "COMMUNITY",
"category": "Tools",
}
import bpy
import math
from mathutils import Vector
class OP_Tracking_refine_solution(bpy.types.Operator):
"""Set track weight by error and solve camera motion"""
bl_idname = "tracking.refine_solution"
bl_label = "Refine"
bl_options = {"UNDO"}
@classmethod
def poll(cls, context):
return (context.area.spaces.active.clip is not None)
def execute(self, context):
error = context.window_manager.TrackingTargetError
smooth = context.window_manager.TrackingSmooth
clip = context.area.spaces.active.clip
try:
tracking = clip.tracking
tracks = tracking.tracks
winx = float(clip.size[0])
winy = float(clip.size[1])
aspy = 1.0 / tracking.camera.pixel_aspect
start = tracking.reconstruction.cameras[0].frame
end = tracking.reconstruction.cameras[-1].frame
except:
return {'CANCELED'}
marker_position = Vector()
for frame in range(start, end):
camera = tracking.reconstruction.cameras.find_frame(frame)
if camera is not None:
imat = camera.matrix.inverted()
projection_matrix = imat.transposed()
else:
continue
for track in tracking.tracks:
marker = track.markers.find_frame(frame)
if marker is None:
continue
# weight incomplete tracks on start and end
if frame > start + smooth and frame < end - smooth:
for m in track.markers:
if not m.mute:
tstart = m.frame
break
for m in reversed(track.markers):
if not m.mute:
tend = m.frame
break
dt = min(0.5 * (tend - tstart), smooth)
if dt > 0:
t0 = min(1.0, (frame - tstart) / dt)
t1 = min(1.0, (tend - frame) / dt)
tw = min(t0, t1)
else:
tw = 0.0
else:
tw = 1.0
reprojected_position = track.bundle * projection_matrix
if reprojected_position.z == 0:
track.weight = 0
track.keyframe_insert("weight", frame=frame)
continue
reprojected_position = reprojected_position / -reprojected_position.z * tracking.camera.focal_length_pixels
reprojected_position = Vector((tracking.camera.principal[0] + reprojected_position[0],tracking.camera.principal[1] * aspy + reprojected_position[1], 0))
marker_position[0] = (marker.co[0] + track.offset[0]) * winx
marker_position[1] = (marker.co[1] + track.offset[1]) * winy * aspy
dp = marker_position - reprojected_position
if dp.length == 0:
track.weight = 1.0
else:
track.weight = min(1.0, tw * error / dp.length)
track.keyframe_insert("weight", frame=frame)
bpy.ops.clip.solve_camera()
return{'FINISHED'}
class OP_Tracking_reset_solution(bpy.types.Operator):
"""Reset track weight and solve camera motion"""
bl_idname = "tracking.reset_solution"
bl_label = "Reset"
bl_options = {"UNDO"}
@classmethod
def poll(cls, context):
return (context.area.spaces.active.clip is not None)
def execute(self, context):
clip = context.area.spaces.active.clip
try:
tracking = clip.tracking
tracks = tracking.tracks
start = tracking.reconstruction.cameras[0].frame
end = tracking.reconstruction.cameras[-1].frame
except:
return {'CANCELED'}
start = tracking.reconstruction.cameras[0].frame
end = tracking.reconstruction.cameras[-1].frame
for frame in range(start, end):
camera = tracking.reconstruction.cameras.find_frame(frame)
if camera is None:
continue
for track in tracking.tracks:
marker = track.markers.find_frame(frame)
if marker is None:
continue
track.weight = 1.0
track.keyframe_insert("weight", frame=frame)
bpy.ops.clip.solve_camera()
return{'FINISHED'}
class RefineMotionTrackingPanel(bpy.types.Panel):
bl_label = "Refine solution"
bl_space_type = "CLIP_EDITOR"
bl_region_type = "TOOLS"
bl_category = "Solve"
@classmethod
def poll(cls, context):
return (context.area.spaces.active.clip is not None)
def draw(self, context):
layout = self.layout
box = layout.box()
row = box.row(align=True)
row.label("Refine")
row = box.row(align=True)
row.prop(context.window_manager, "TrackingTargetError", text="Target error")
row = box.row(align=True)
row.prop(context.window_manager, "TrackingSmooth", text="Smooth transition")
row = box.row(align=True)
row.operator("tracking.refine_solution")
row.operator("tracking.reset_solution")
def register():
bpy.types.WindowManager.TrackingTargetError = bpy.props.FloatProperty(
name="error",
description="Refine motion track target error",
default=0.3,
min=0.01)
bpy.types.WindowManager.TrackingSmooth = bpy.props.FloatProperty(
name="Smooth transition",
description="Smooth weight transition on start and end of incomplete tracks",
default=25,
min=1)
bpy.utils.register_module(__name__)
def unregister():
bpy.utils.unregister_module(__name__)
del bpy.types.WindowManager.TrackingTargetError
del bpy.types.WindowManager.TrackingSmooth
if __name__ == "__main__":
register()