File size: 5,046 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | #!/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 / "01_align"
MATRIX_DIR = DATAMAKER_DIR / "matrix"
OUTPUT_DIR = DATAMAKER_DIR / "02_warp"
VIDEO_IDS = [f"{idx:02d}" for idx in range(1, 15)]
TARGET_WIDTH = 1280
TARGET_HEIGHT = 1024
OFFSET_WIDTH = -40
OFFSET_HEIGHT = 0
MATRIX_TRANSPOSE = True
INTERPOLATION = cv2.INTER_CUBIC
FOURCC = "mp4v"
OVERWRITE = True
# =========================
def load_matrix(matrix_path: Path) -> np.ndarray:
if not matrix_path.exists():
raise FileNotFoundError(f"Matrix not found: {matrix_path}")
matrix = np.genfromtxt(matrix_path, delimiter=",")
if matrix.shape != (3, 3):
raise ValueError(f"Matrix must be 3x3: {matrix_path}")
return matrix.T if MATRIX_TRANSPOSE else matrix
def get_crop_region(frame_shape: tuple[int, ...]) -> tuple[int, int]:
height, width = frame_shape[:2]
height_start = int((height - TARGET_HEIGHT) / 2) + OFFSET_HEIGHT
width_start = int((width - TARGET_WIDTH) / 2) + OFFSET_WIDTH
if (
height_start < 0
or width_start < 0
or height_start + TARGET_HEIGHT > height
or width_start + TARGET_WIDTH > width
):
raise ValueError(
"Crop region is out of bounds. "
f"frame=({width}x{height}), crop=({TARGET_WIDTH}x{TARGET_HEIGHT}), "
f"start=({width_start},{height_start})"
)
return height_start, width_start
def warp_pair(
ir_path: Path,
vi_path: Path,
matrix_path: Path,
out_ir_path: Path,
out_vi_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_ir_path.exists() or out_vi_path.exists()):
raise FileExistsError(
f"Output exists and OVERWRITE=False: {out_ir_path}, {out_vi_path}"
)
matrix = load_matrix(matrix_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}")
ok_first_vi, first_vi = cap_vi.read()
if not ok_first_vi:
raise IOError(f"Failed to read first VI frame: {vi_path}")
vi_height, vi_width = first_vi.shape[:2]
height_start, width_start = get_crop_region(first_vi.shape)
out_ir_path.parent.mkdir(parents=True, exist_ok=True)
out_vi_path.parent.mkdir(parents=True, exist_ok=True)
fps = cap_vi.get(cv2.CAP_PROP_FPS)
fourcc = cv2.VideoWriter_fourcc(*FOURCC)
out_ir = cv2.VideoWriter(
str(out_ir_path), fourcc, fps, (TARGET_WIDTH, TARGET_HEIGHT), False
)
out_vi = cv2.VideoWriter(
str(out_vi_path), fourcc, fps, (TARGET_WIDTH, TARGET_HEIGHT), True
)
if not out_ir.isOpened() or not out_vi.isOpened():
raise IOError(f"Failed to open output writers: {out_ir_path}, {out_vi_path}")
total_frames = min(
int(cap_ir.get(cv2.CAP_PROP_FRAME_COUNT)),
int(cap_vi.get(cv2.CAP_PROP_FRAME_COUNT)),
)
cap_vi.set(cv2.CAP_PROP_POS_FRAMES, 0)
for _ in tqdm(
range(total_frames),
desc=f"Warp {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
if len(frame_ir.shape) == 3:
frame_ir = cv2.cvtColor(frame_ir, cv2.COLOR_BGR2GRAY)
ir_warp = cv2.warpPerspective(
frame_ir,
matrix,
(vi_width, vi_height),
flags=INTERPOLATION,
)
ir_output = ir_warp[
height_start : height_start + TARGET_HEIGHT,
width_start : width_start + TARGET_WIDTH,
]
vi_output = frame_vi[
height_start : height_start + TARGET_HEIGHT,
width_start : width_start + TARGET_WIDTH,
]
out_ir.write(ir_output)
out_vi.write(vi_output)
cap_ir.release()
cap_vi.release()
out_ir.release()
out_vi.release()
def main() -> None:
with tqdm(
total=len(VIDEO_IDS),
desc="Total warp",
unit="video",
position=0,
) as progress:
for video_id in VIDEO_IDS:
progress.set_postfix(video=video_id)
out_dir = OUTPUT_DIR / video_id
warp_pair(
ir_path=INPUT_DIR / video_id / "ir.mp4",
vi_path=INPUT_DIR / video_id / "vi.mp4",
matrix_path=MATRIX_DIR / f"{video_id}.csv",
out_ir_path=out_dir / "ir.mp4",
out_vi_path=out_dir / "vi.mp4",
)
tqdm.write(f"Warped {video_id} -> {out_dir}")
progress.update(1)
if __name__ == "__main__":
main()
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