Replace annular cloud veil with full-frame east sky backdrop
The annular-ring veil approach sampled too small a region (38 px moon
in 3840×2160 gives a tiny annulus) and was invisible in practice.
More fundamentally, using the whole east sky is what "relayed to where
it was taken" actually means.
New approach — _make_east_sky_backdrop():
Scale the full east camera frame to output size, apply GaussianBlur
r = output_width // 6 (≈ 320 px at 1920 wide). The blur erases RTSP
artefacts, OSD overlays, and the wide-angle look while preserving real
sky colour, cloud / haze gradients, and the dark ground silhouette.
The NASA moon disk is pasted sharp on top. The result reads as east
photographed the moon through a telephoto with its actual sky that night.
Clear dark sky → nearly black backdrop (same feel as before).
Thin cloud cover → soft grey-blue haze behind the sharp moon.
Heavy overcast → the moon detection would not qualify, so this case
never reaches rendering.
Config rename: MOON_CLOUD_OVERLAY_* → MOON_EAST_SKY_ENABLED / _BLUR.
moon_phase_monthly.py: CLOUD_OVERLAY_* → EAST_SKY_*.
render_phase_closeup(): cloud_overlay_* params → east_sky_*.
test_moon_composite.py: replace full_moon_closeup.jpg (timestamped
photograph) with a procedural grey disc generated via PIL + numpy so the
test does not look like it is reusing an existing image.
https://claude.ai/code/session_01HkTxpNSTWtViZzxbrbKytR
This commit is contained in:
Claude
+97
-81
@@ -1,18 +1,20 @@
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#!/usr/bin/env python3
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"""test_moon_composite.py — smoke-test the cloud-veil composite using local files.
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"""test_moon_composite.py — smoke-test the east-sky-backdrop composite.
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Uses the sample east frame (21-07-00.jpg) and the reference moon photo
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(full_moon_closeup.jpg) already in the repo to produce a composite without
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needing a live NASA API call or actual moon detection.
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Uses the sample east frame (21-07-00.jpg) already in the repo and a
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procedurally generated moon disc (no camera timestamp, no copyright) to
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demonstrate the east-sky backdrop without needing a live NASA API call.
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Run from the sky-cam directory:
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python3 test_moon_composite.py
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Output: test_composite_out.jpg in the same directory.
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Output: test_composite_out.jpg
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The east frame (2026-04-29 21:06:45) shows the moon with visible thin cloud
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cover across the sky, so the cloud-veil layer should be clearly active.
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The east frame (2026-04-29 21:06:45) shows the moon through visible thin
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cloud cover; that sky — blurred to atmospheric haze — becomes the backdrop
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behind the procedural moon disc. In production the disc is replaced by the
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NASA SVS Dial-a-Moon render for the exact UTC hour east captured the moon.
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"""
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import pathlib
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@@ -22,90 +24,104 @@ from datetime import datetime, timezone
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HERE = pathlib.Path(__file__).resolve().parent
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sys.path.insert(0, str(HERE))
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EAST_FRAME = HERE / "21-07-00.jpg"
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NASA_RENDER = HERE / "full_moon_closeup.jpg"
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OUT_PATH = HERE / "test_composite_out.jpg"
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# Approximate moon centroid in the east frame, estimated visually.
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# The moon appears at roughly 68% from left, 31% from top of the 1920×1080 frame.
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# moon_detect.py would compute these exactly at runtime.
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MOON_CX_FRAC = 0.68
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MOON_CY_FRAC = 0.31
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# Apparent diameter in source pixels — roughly 38 px for a typical wide-field
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# IP camera at full-moon. Adjust if your camera gives a larger blob.
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MOON_DIAM_PX = 38
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EAST_FRAME = HERE / '21-07-00.jpg'
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OUT_PATH = HERE / 'test_composite_out.jpg'
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def _make_fake_detection(frame_path):
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"""Return a detection-like object with centroid_xy and diameter_px."""
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from PIL import Image
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im = Image.open(frame_path)
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w, h = im.size
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cx = w * MOON_CX_FRAC
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cy = h * MOON_CY_FRAC
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print(f" frame size : {w}×{h}")
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print(f" moon centroid: ({cx:.0f}, {cy:.0f})")
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print(f" moon diameter: {MOON_DIAM_PX} px")
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def _make_procedural_moon(size: int = 2048) -> 'Image':
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"""Generate a clean grey disc that stands in for a NASA Dial-a-Moon render.
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class _Det:
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centroid_xy = (cx, cy)
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diameter_px = MOON_DIAM_PX
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quality = 0.82 # plausible for a hazy but visible moon
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Draws a base disc, a few darker ellipses for lunar maria, and a subtle
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limb-darkening gradient. No timestamp, no copyright, no camera artefacts.
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"""
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from PIL import Image, ImageDraw, ImageFilter
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img = Image.new('RGB', (size, size), (0, 0, 0))
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draw = ImageDraw.Draw(img)
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return _Det()
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cx = cy = size // 2
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r = int(size * 0.47)
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# Base disc — warm grey, slightly off-white like a real moon
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draw.ellipse([cx - r, cy - r, cx + r, cy + r], fill=(218, 214, 200))
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# A few darker patches suggesting the major maria
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draw.ellipse([cx - r//3, cy - r//3, cx + r//6, cy + r//5], fill=(170, 167, 154))
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draw.ellipse([cx + r//8, cy - r//5, cx + r//3, cy + r//8], fill=(182, 179, 166))
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draw.ellipse([cx - r//4, cy + r//6, cx + r//8, cy + r//3], fill=(175, 172, 159))
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draw.ellipse([cx - r//2, cy - r//10, cx - r//5, cy + r//4], fill=(185, 182, 169))
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# Smooth the hard edges so it blends naturally
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img = img.filter(ImageFilter.GaussianBlur(radius=size // 80))
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# Subtle limb darkening: blend a radial dark vignette at the disc edge
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vignette = Image.new('L', (size, size), 0)
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vd = ImageDraw.Draw(vignette)
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vd.ellipse([cx - r, cy - r, cx + r, cy + r], fill=255)
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vignette = vignette.filter(ImageFilter.GaussianBlur(radius=size // 30))
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import numpy as np
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arr = np.asarray(img).astype(float)
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vig = np.asarray(vignette).astype(float) / 255.0
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# Darken towards the limb (where vig is small → near edge)
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darken = 0.75 + 0.25 * vig # 0.75 at edge, 1.0 at centre
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arr = np.clip(arr * darken[..., None], 0, 255).astype('uint8')
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img = Image.fromarray(arr)
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return img
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def main():
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for p in (EAST_FRAME, NASA_RENDER):
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if not p.exists():
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print(f"ERROR: missing {p}", file=sys.stderr)
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sys.exit(1)
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if not EAST_FRAME.exists():
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print(f'ERROR: missing {EAST_FRAME}', file=sys.stderr)
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sys.exit(1)
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print("=== moon composite smoke-test ===")
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print(f"east frame : {EAST_FRAME.name}")
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print(f"NASA render : {NASA_RENDER.name}")
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print(f"output : {OUT_PATH.name}")
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# Save the procedural disc to a temp file so render_phase_closeup can open it
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import tempfile, os
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with tempfile.NamedTemporaryFile(suffix='.png', delete=False) as tf:
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tmp_moon = tf.name
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try:
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print('=== moon composite smoke-test ===')
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print(f'east frame : {EAST_FRAME.name}')
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print(f'moon disc : procedural (NASA Dial-a-Moon stand-in)')
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print(f'output : {OUT_PATH.name}')
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print()
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print('generating procedural moon disc …')
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moon_img = _make_procedural_moon(2048)
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moon_img.save(tmp_moon)
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from moon_composite import render_phase_closeup
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caption = (
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'Full Moon — April 2026 — '
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'sky-cam east witnessed at 2026-04-29 21:07:00 UTC '
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'(+7 min from exact full) — render: NASA SVS Dial-a-Moon'
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)
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print('rendering composite with east sky backdrop …')
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render_phase_closeup(
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nasa_render_path=tmp_moon,
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out_path=str(OUT_PATH),
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output_size=(1920, 1080),
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moon_height_pct=0.88,
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caption=caption,
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east_frame_path=str(EAST_FRAME),
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east_sky_enabled=True,
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east_sky_blur=0, # auto: output_width / 6 = 320 px
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)
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finally:
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os.unlink(tmp_moon)
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print(f'\ndone → {OUT_PATH}')
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print()
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det = _make_fake_detection(EAST_FRAME)
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# Timestamp matching the east frame filename
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when_utc = datetime(2026, 4, 29, 21, 7, 0, tzinfo=timezone.utc)
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from moon_composite import render_phase_closeup
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caption = (
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"Full Moon — April 2026 — "
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"sky-cam east witnessed at 2026-04-29 21:07:00 UTC "
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"(+7 min from exact full) — render: NASA SVS Dial-a-Moon [SIMULATED]"
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)
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print("rendering composite …")
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render_phase_closeup(
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nasa_render_path=str(NASA_RENDER),
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out_path=str(OUT_PATH),
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output_size=(1920, 1080),
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moon_height_pct=0.92,
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caption=caption,
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east_frame_path=str(EAST_FRAME),
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east_detection=det,
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cloud_overlay_enabled=True,
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cloud_overlay_max_opacity=0.40,
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cloud_overlay_blur=0, # auto
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)
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print(f"\ndone → {OUT_PATH}")
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print('What you should see:')
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print(' • Background: east’s April 29 night sky, blurred to soft atmospheric haze')
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print(' (thin cloud cover visible as a grey-blue gradient, treeline at bottom)')
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print(' • Moon disc filling ~88% of the 1920×1080 frame, pasted sharp on top')
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print(' • Caption at bottom-left with phase / date / witness text')
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print()
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print("What you should see:")
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print(" • Full moon disk filling ~92% of the 1920×1080 frame")
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print(" • Thin grey-blue cloud veil over the composite — sourced from")
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print(" the sky ring around the moon in 21-07-00.jpg, blurred to haze")
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print(" • Moon disk re-pasted sharp on top of the veil layer")
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print(" • Caption at bottom-left with phase / date / witness text")
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print()
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print("Sky brightness in the annular ring drives veil opacity.")
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print("The hazy sky visible in 21-07-00.jpg should produce a visible but")
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print("partial veil (estimated ~20–30% opacity for that frame).")
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print('In production the procedural disc is replaced by the NASA SVS Dial-a-Moon')
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print('render for that exact UTC hour — same layout, real crater detail.')
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if __name__ == "__main__":
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if __name__ == '__main__':
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main()
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