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Rewrite birdseye auto layout (#6818)
* Prefer horizontal layout to vertical * Rewrite birdseye to use aspect ratios instead of resolutions as layout configurator * Improve layout with slightly larger than 16:9 cameras * Remove manual 2 camera layout * Lint * Remove log
This commit is contained in:
Nicolas Mowen
GitHub
parent
ca7853c087
commit
0592cedcde
@ -1,6 +1,7 @@
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import datetime
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import glob
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import logging
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import math
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import multiprocessing as mp
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import os
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import queue
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@ -269,161 +270,118 @@ class BirdsEyeFrameManager:
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def update_frame(self):
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"""Update to a new frame for birdseye."""
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def calculate_two_cam_layout(canvas, cameras_to_add: list[str]) -> tuple[any]:
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"""Calculate the optimal layout for 2 cameras."""
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first_camera = cameras_to_add[0]
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first_camera_dims = self.cameras[first_camera]["dimensions"].copy()
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second_camera = cameras_to_add[1]
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second_camera_dims = self.cameras[second_camera]["dimensions"].copy()
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# check for optimal layout
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if first_camera_dims[0] + second_camera_dims[0] < canvas_width:
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# place cameras horizontally
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first_scaled_width = int(
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canvas_height * first_camera_dims[0] / first_camera_dims[1]
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)
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second_scaled_width = int(
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canvas_height * second_camera_dims[0] / second_camera_dims[1]
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)
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first_height = canvas_height
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second_height = canvas_height
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if first_scaled_width + second_scaled_width > canvas_width:
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if first_scaled_width > second_scaled_width:
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first_scaled_width = canvas_width - second_scaled_width
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first_height = int(
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first_scaled_width
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* first_camera_dims[1]
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/ first_camera_dims[0]
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)
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else:
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second_scaled_width = canvas_width - first_scaled_width
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second_height = int(
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second_scaled_width
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* second_camera_dims[1]
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/ second_camera_dims[0]
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)
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return [
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[
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(
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first_camera,
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(0, 0, first_scaled_width, first_height),
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),
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(
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second_camera,
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(
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first_scaled_width + 1,
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0,
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second_scaled_width,
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second_height,
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),
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),
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],
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]
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else:
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# place cameras vertically
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top_scaled_width = int(
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(canvas_height / 2) * first_camera_dims[0] / first_camera_dims[1]
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)
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bottom_scaled_width = int(
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(canvas_height / 2) * second_camera_dims[0] / second_camera_dims[1]
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)
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return [
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[
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(
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first_camera,
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(0, 0, top_scaled_width, int(canvas_height / 2)),
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)
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],
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[
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(
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second_camera,
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(
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0,
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int(canvas_height / 2),
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bottom_scaled_width,
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int(canvas_height / 2),
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),
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)
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],
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]
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def calculate_layout(
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canvas, cameras_to_add: list[str], coefficient
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) -> tuple[any]:
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"""Calculate the optimal layout for 3+ cameras."""
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"""Calculate the optimal layout for 2+ cameras."""
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camera_layout: list[list[any]] = []
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camera_layout.append([])
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canvas_aspect = canvas[0] / canvas[1]
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canvas_gcd = math.gcd(canvas[0], canvas[1])
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canvas_aspect_x = (canvas[0] / canvas_gcd) * coefficient
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canvas_aspect_y = (canvas[0] / canvas_gcd) * coefficient
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starting_x = 0
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x = starting_x
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y = 0
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y_i = 0
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max_height = 0
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max_y = 0
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for camera in cameras_to_add:
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camera_dims = self.cameras[camera]["dimensions"].copy()
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camera_aspect = camera_dims[0] / camera_dims[1]
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camera_gcd = math.gcd(camera_dims[0], camera_dims[1])
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camera_aspect_x = camera_dims[0] / camera_gcd
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camera_aspect_y = camera_dims[1] / camera_gcd
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if round(camera_aspect_x / camera_aspect_y, 1) == 1.8:
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# account for slightly off 16:9 cameras
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camera_aspect_x = 16
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camera_aspect_y = 9
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elif round(camera_aspect_x / camera_aspect_y, 1) == 1.3:
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# make 4:3 cameras the same relative size as 16:9
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camera_aspect_x = 12
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camera_aspect_y = 9
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if camera_dims[1] > camera_dims[0]:
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portrait = True
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elif camera_aspect < canvas_aspect:
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# if the camera aspect ratio is less than canvas aspect ratio, it needs to be scaled down to fit
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camera_dims[0] *= camera_aspect / canvas_aspect
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camera_dims[1] *= camera_aspect / canvas_aspect
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portrait = False
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else:
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portrait = False
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if (x + camera_dims[0] * coefficient) <= canvas[0]:
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if (x + camera_aspect_x) <= canvas_aspect_x:
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# insert if camera can fit on current row
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scaled_width = int(camera_dims[0] * coefficient)
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camera_layout[y_i].append(
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(
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camera,
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(
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x,
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y,
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scaled_width,
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int(camera_dims[1] * coefficient),
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camera_aspect_x,
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camera_aspect_y,
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),
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)
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)
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x += scaled_width
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if portrait:
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starting_x = scaled_width
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starting_x = camera_aspect_x
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else:
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max_height = max(
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max_height,
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int(camera_dims[1] * coefficient),
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max_y = max(
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max_y,
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camera_aspect_y,
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)
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x += camera_aspect_x
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else:
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# move on to the next row and insert
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y += max_height
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y += max_y
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y_i += 1
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camera_layout.append([])
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x = starting_x
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if camera_dims[0] * coefficient > canvas_width:
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safe_coefficient = 1
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else:
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safe_coefficient = coefficient
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if x + camera_aspect_x > canvas_aspect_x:
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return None
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camera_layout[y_i].append(
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(
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camera,
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(
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x,
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y,
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int(camera_dims[0] * safe_coefficient),
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int(camera_dims[1] * safe_coefficient),
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),
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(camera_aspect_x, camera_aspect_y),
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)
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)
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x += int(camera_dims[0] * safe_coefficient)
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x += camera_aspect_x
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return (camera_layout, y + max_height)
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if y + max_y > canvas_aspect_y:
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return None
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row_height = int(canvas_height / coefficient)
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final_camera_layout = []
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starting_x = 0
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y = 0
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for row in camera_layout:
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final_row = []
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x = starting_x
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for cameras in row:
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camera_dims = self.cameras[cameras[0]]["dimensions"].copy()
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if camera_dims[1] > camera_dims[0]:
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scaled_height = int(row_height * coefficient)
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scaled_width = int(
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scaled_height * camera_dims[0] / camera_dims[1]
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)
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starting_x = scaled_width
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else:
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scaled_height = row_height
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scaled_width = int(
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scaled_height * camera_dims[0] / camera_dims[1]
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)
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if (
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x + scaled_width > canvas_width
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or y + scaled_height > canvas_height
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):
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return None
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final_row.append((cameras[0], (x, y, scaled_width, scaled_height)))
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x += scaled_width
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y += row_height
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final_camera_layout.append(final_row)
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return final_camera_layout
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# determine how many cameras are tracking objects within the last 30 seconds
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active_cameras = set(
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@ -493,30 +451,28 @@ class BirdsEyeFrameManager:
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)
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]
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]
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elif len(active_cameras) == 2:
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self.camera_layout = calculate_two_cam_layout(
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(canvas_width, canvas_height), active_cameras_to_add
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)
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else:
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# calculate optimal layout
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coefficient = 1.0
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coefficient = 2
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calculating = True
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# decrease scaling coefficient until height of all cameras can fit into the birdseye canvas
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while calculating:
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layout_candidate, total_height = calculate_layout(
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layout_candidate = calculate_layout(
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(canvas_width, canvas_height),
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active_cameras_to_add,
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coefficient,
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)
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if (canvas_height * 0.75) < total_height <= canvas_height:
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calculating = False
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elif total_height < canvas_height * 0.75:
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coefficient += 0.1
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calculating = False
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else:
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coefficient -= 0.1
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if not layout_candidate:
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if coefficient < 10:
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coefficient += 1
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continue
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else:
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logger.error("Error finding appropriate birdseye layout")
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return
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calculating = False
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self.camera_layout = layout_candidate
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