# Show2D — Quick Demo Single images and gallery layouts with different column configurations.

try:
    %load_ext autoreload
    %autoreload 2
    %env ANYWIDGET_HMR=1
except Exception:
    pass  # autoreload unavailable (Colab Python 3.12+)

env: ANYWIDGET_HMR=1

import numpy as np
from quantem.widget import Show2D
import quantem.widget
print(f"quantem.widget {quantem.widget.__version__}")
def make_hrtem(size=256, seed=0):
    """Simulate HRTEM lattice fringes with amorphous edge and shot noise."""
    rng = np.random.default_rng(seed)
    y, x = np.mgrid[:size, :size]
    img = np.zeros((size, size))
    freqs = [(0.08, 0.0), (0.06, np.pi / 3), (0.10, np.pi / 6)]
    for freq, angle in freqs:
        img += np.cos(2 * np.pi * freq * (x * np.cos(angle) + y * np.sin(angle)))
    r = np.sqrt((x - size // 2)**2 + (y - size // 2)**2)
    envelope = 1.0 / (1 + np.exp(-0.05 * (size // 3 - r)))
    img = img * envelope + rng.normal(0, 0.3, (size, size))
    return img.astype(np.float32)
# Generate a few different images
imgs = [make_hrtem(256, seed=i) for i in range(6)]

quantem.widget 0.4.0a3

# Single image
Show2D(imgs[0], title="Single Image", cmap="gray")

# 6 images, 3 columns
Show2D(imgs, title="6 Images — 3 Columns", ncols=3, cmap="viridis")

Inspect Widget State

w = Show2D(imgs[0], title="Single Image", cmap="gray")
w.summary()

Single Image
════════════════════════════════
Image:    256×256
Data:     min=-3.437  max=3.831  mean=0.0009885
Display:  gray | manual contrast | linear