62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
from __future__ import annotations
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from pathlib import Path
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import cv2
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import numpy as np
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ROOT = Path(__file__).resolve().parents[1]
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SAMPLE_DIR = ROOT / "storage" / "samples"
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def draw_curve(frame: np.ndarray, t: int) -> None:
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height, width = frame.shape[:2]
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points = []
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for x in np.linspace(48, width - 54, 110):
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y = height * 0.55 + 48 * np.sin((x / width) * 2.8 * np.pi + t * 0.11)
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y += 22 * np.sin((x / width) * 7.2 * np.pi + t * 0.035)
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points.append([int(x), int(y)])
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pts = np.array(points, dtype=np.int32).reshape((-1, 1, 2))
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cv2.polylines(frame, [pts], False, (36, 36, 36), 2, cv2.LINE_AA)
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cv2.circle(frame, tuple(points[-1]), 5, (24, 24, 24), -1, cv2.LINE_AA)
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def make_frame(index: int, width: int = 640, height: int = 420) -> np.ndarray:
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rng = np.random.default_rng(index)
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base = np.full((height, width), 156, dtype=np.uint8)
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gradient = np.linspace(-22, 18, width, dtype=np.float32)
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base = np.clip(base.astype(np.float32) + gradient[None, :], 0, 255).astype(np.uint8)
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noise = rng.normal(0, 7, (height, width)).astype(np.float32)
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base = np.clip(base.astype(np.float32) + noise, 0, 255).astype(np.uint8)
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frame = cv2.cvtColor(base, cv2.COLOR_GRAY2BGR)
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for offset in range(-160, width, 130):
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center = (offset + index * 2, height // 2)
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cv2.ellipse(frame, center, (90, 180), 8, 0, 360, (176, 176, 176), 8, cv2.LINE_AA)
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cv2.line(frame, (80, 60), (560, 86 + index % 18), (90, 90, 90), 4, cv2.LINE_AA)
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draw_curve(frame, index)
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frame = cv2.GaussianBlur(frame, (3, 3), 0)
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return frame
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def main() -> None:
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SAMPLE_DIR.mkdir(parents=True, exist_ok=True)
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video_path = SAMPLE_DIR / "synthetic_guidewire.mp4"
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image_path = SAMPLE_DIR / "synthetic_guidewire.png"
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width, height = 640, 420
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writer = cv2.VideoWriter(str(video_path), cv2.VideoWriter_fourcc(*"mp4v"), 12.0, (width, height))
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for index in range(72):
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frame = make_frame(index, width, height)
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if index == 12:
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cv2.imwrite(str(image_path), frame)
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writer.write(frame)
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writer.release()
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print(video_path)
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print(image_path)
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if __name__ == "__main__":
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main()
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