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more zoom out conditions

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This commit is contained in:
Josh Hawkins 2023-10-13 16:51:06 -05:00
parent 80ffc690ed
commit 42a3036771
2 changed files with 28 additions and 12 deletions
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2
frigate/const.py
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@ -57,6 +57,6 @@ INSERT_MANY_RECORDINGS = "insert_many_recordings"
AUTOTRACKING_MOTION_MIN_DISTANCE = 20
AUTOTRACKING_MOTION_MAX_POINTS = 500
AUTOTRACKING_MAX_MOVE_METRICS = 500
AUTOTRACKING_ZOOM_OUT_HYSTERESIS = 1.5
AUTOTRACKING_ZOOM_OUT_HYSTERESIS = 1.8
AUTOTRACKING_ZOOM_IN_HYSTERESIS = 0.9
AUTOTRACKING_ZOOM_EDGE_THRESHOLD = 0.02

38
frigate/ptz/autotrack.py
View File

@ -554,7 +554,7 @@ class PtzAutoTracker:
def _below_distance_threshold(self, camera, obj):
# Returns true if Euclidean distance from object to center of frame is
# less than 20% of the of the larger dimension (width or height) of the frame,
# less than 10% of the of the larger dimension (width or height) of the frame,
# multiplied by a scaling factor for object size.
# Distance is increased if object is not moving to prevent small ptz moves
# Adjusting this percentage slightly lower will effectively cause the camera to move
@ -644,6 +644,8 @@ class PtzAutoTracker:
target_box = obj.obj_data["area"] / (camera_width * camera_height)
below_area_threshold = target_box < 0.05
# introduce some hysteresis to prevent a yo-yo zooming effect
zoom_out_hysteresis = target_box > (
self.previous_target_box[camera] * AUTOTRACKING_ZOOM_OUT_HYSTERESIS
@ -672,6 +674,9 @@ class PtzAutoTracker:
logger.debug(
f"{camera}: Zoom test: below distance threshold: {(below_distance_threshold)}"
)
logger.debug(
f"{camera}: Zoom test: below area threshold: {(below_area_threshold)} target box: {target_box}"
)
logger.debug(
f"{camera}: Zoom test: below dimension threshold: {below_dimension_threshold} width: {(bb_right - bb_left) / camera_width}, height: { (bb_bottom - bb_top) / camera_height}"
)
@ -687,24 +692,35 @@ class PtzAutoTracker:
f"{camera}: Zoom test: zoom out hysteresis limit: {zoom_out_hysteresis} previous: {self.previous_target_box[camera]} target: {target_box}"
)
# Zoom in conditions
# Zoom in conditions (and)
# object area could be larger
# object is away from the edge of the frame
# object is not moving too quickly
# object is centered or small in the frame
# camera is not fully zoomed in
if (
away_from_edge
and (below_distance_threshold or below_dimension_threshold)
zoom_in_hysteresis
and away_from_edge
and below_velocity_threshold
and (below_distance_threshold or below_dimension_threshold)
and not at_max_zoom
and zoom_in_hysteresis
):
return True
# Zoom out conditions
# Zoom out conditions (or)
# object area got too large, is touching an edge, and centered
# object area got too large and has at least one dimension that is too large
# object is touching an edge and either centered or has too large of an area
# object is moving too quickly
if (
zoom_out_hysteresis
and (not away_from_edge and below_distance_threshold)
(zoom_out_hysteresis and not away_from_edge and below_distance_threshold)
or (zoom_out_hysteresis and not below_dimension_threshold)
or (
not away_from_edge
and (below_distance_threshold or not below_area_threshold)
)
or not below_velocity_threshold
or (not below_dimension_threshold and not below_distance_threshold)
and not at_min_zoom
):
) and not at_min_zoom:
return False
# Don't zoom at all