File size: 3,493 Bytes
9f30907 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | #!/usr/bin/env python3
# -*- coding: utf-8 -*-
from pathlib import Path
import cv2
import numpy as np
from tqdm import tqdm
# =========================
# Parameters
# =========================
DATAMAKER_DIR = Path(__file__).resolve().parent
INPUT_DIR = DATAMAKER_DIR / "02_warp"
OUTPUT_DIR = DATAMAKER_DIR / "03_ckboard"
VIDEO_IDS = [f"{idx:02d}" for idx in range(1, 15)]
BLOCK_SIZE = 50
FOURCC = "mp4v"
OVERWRITE = True
# =========================
def create_checkerboard_mask(height: int, width: int, block_size: int) -> np.ndarray:
x = np.arange(width)
y = np.arange(height)
x_grid, y_grid = np.meshgrid(x, y)
mask = np.mod(x_grid // block_size + y_grid // block_size, 2)
return mask.astype(bool)
def fuse_checkerboard(
ir_frame: np.ndarray,
vi_frame: np.ndarray,
block_size: int,
) -> np.ndarray:
if len(ir_frame.shape) == 2:
ir_frame = cv2.cvtColor(ir_frame, cv2.COLOR_GRAY2BGR)
if ir_frame.shape[:2] != vi_frame.shape[:2]:
raise ValueError(
f"Frame sizes differ: IR={ir_frame.shape[:2]}, VI={vi_frame.shape[:2]}"
)
height, width = ir_frame.shape[:2]
mask = create_checkerboard_mask(height, width, block_size)
mask_3d = np.stack([mask] * 3, axis=2)
return np.where(mask_3d, ir_frame, vi_frame)
def make_checkerboard(ir_path: Path, vi_path: Path, out_path: Path) -> None:
if not ir_path.exists() or not vi_path.exists():
raise FileNotFoundError(f"Missing input pair: {ir_path}, {vi_path}")
if not OVERWRITE and out_path.exists():
raise FileExistsError(f"Output exists and OVERWRITE=False: {out_path}")
cap_ir = cv2.VideoCapture(str(ir_path))
cap_vi = cv2.VideoCapture(str(vi_path))
if not cap_ir.isOpened() or not cap_vi.isOpened():
raise IOError(f"Failed to open videos: {ir_path}, {vi_path}")
width = int(cap_ir.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap_ir.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps = cap_ir.get(cv2.CAP_PROP_FPS)
total_frames = min(
int(cap_ir.get(cv2.CAP_PROP_FRAME_COUNT)),
int(cap_vi.get(cv2.CAP_PROP_FRAME_COUNT)),
)
out_path.parent.mkdir(parents=True, exist_ok=True)
writer = cv2.VideoWriter(
str(out_path),
cv2.VideoWriter_fourcc(*FOURCC),
fps,
(width, height),
)
if not writer.isOpened():
raise IOError(f"Failed to open output writer: {out_path}")
for _ in tqdm(
range(total_frames),
desc=f"Checkerboard {ir_path.parent.name}",
unit="frame",
position=1,
leave=False,
):
ok_ir, frame_ir = cap_ir.read()
ok_vi, frame_vi = cap_vi.read()
if not ok_ir or not ok_vi:
break
writer.write(fuse_checkerboard(frame_ir, frame_vi, BLOCK_SIZE))
cap_ir.release()
cap_vi.release()
writer.release()
def main() -> None:
with tqdm(
total=len(VIDEO_IDS),
desc="Total checkerboard",
unit="video",
position=0,
) as progress:
for video_id in VIDEO_IDS:
progress.set_postfix(video=video_id)
out_path = OUTPUT_DIR / f"{video_id}.mp4"
make_checkerboard(
ir_path=INPUT_DIR / video_id / "ir.mp4",
vi_path=INPUT_DIR / video_id / "vi.mp4",
out_path=out_path,
)
tqdm.write(f"Checkerboard {video_id} -> {out_path}")
progress.update(1)
if __name__ == "__main__":
main()
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