Move the processing code under pipeline/

Preparing to merge this repository into a combined astrophotography
repo. session-scripts/ becomes pipeline/ because the scripts import
layout.py from their own directory and must stay together, and because
'pipeline' says what it is rather than how it came about. observing/
stays at the top level: observing plans are not processing code.

session-scripts/triptych.py

@@ -1,62 +0,0 @@
-"""Side-by-side of the three renderings, full field and a matched core crop.
-
-Same pixels in all three panels, so any difference is processing and nothing
-else.
-"""
-import os
-
-import matplotlib
-matplotlib.use("Agg")
-import matplotlib.pyplot as plt
-import numpy as np
-from PIL import Image
-
-import layout
-
-OUT = layout.SESSION
-# The finished renderings live in their own directory: they are the
-# deliverables, and keeping them apart from the masters, the
-# intermediates and the analysis figures makes it obvious which
-# files are meant to be looked at.
-FINAL = layout.path("final")
-PANELS = [
-    ("NGC5128-final-1-stacked.png", "1. Stacked + standard stretch",
-     "align, average, stretch - nothing else"),
-    ("NGC5128-final-2-processed.png", "2. Conventionally processed",
-     "gradient removal, colour balance, denoise"),
-    ("NGC5128-final-3-best.png", "3. Science-informed",
-     "halo-preserving background, solar-analogue colour,\n"
-     "core recovered, star-protected deconvolution"),
-]
-CROP = (1950, 1200, 2850, 1875)     # the dust lane, at full resolution
-
-fig, axes = plt.subplots(2, 3, figsize=(21, 11.5),
-                         gridspec_kw=dict(height_ratios=[1.35, 1]))
-fig.patch.set_facecolor("#111111")
-
-for col, (fname, title, sub) in enumerate(PANELS):
-    im = Image.open(layout.path(fname))
-    wide = im.copy()
-    wide.thumbnail((1500, 1500), Image.LANCZOS)
-    axes[0, col].imshow(np.asarray(wide))
-    axes[0, col].set_title(title, color="white", fontsize=15, pad=10)
-    axes[0, col].text(0.5, -0.055, sub, color="#9fb8d0", fontsize=10,
-                      ha="center", va="top", linespacing=1.4, wrap=True,
-                      transform=axes[0, col].transAxes)
-    axes[1, col].imshow(np.asarray(im.crop(CROP)))
-    axes[1, col].set_title("core, 1:1", color="#9fb8d0", fontsize=11, pad=6)
-    for row in (0, 1):
-        axes[row, col].set_xticks([])
-        axes[row, col].set_yticks([])
-        for s in axes[row, col].spines.values():
-            s.set_color("#333333")
-
-fig.suptitle("NGC 5128 (Centaurus A) - iTelescope T32, 2026-07-21 - "
-             "L 12x300s, RGB 4x300s each - the same data, three treatments",
-             color="white", fontsize=17, y=0.975)
-fig.tight_layout(rect=[0, 0.01, 1, 0.955])
-fig.subplots_adjust(hspace=0.16)
-path = layout.path("NGC5128-final-comparison.jpg")
-fig.savefig(path, dpi=100, facecolor=fig.get_facecolor(),
-            pil_kwargs={"quality": 92})
-print("wrote", path)