A standard EAN-13 barcode visualization commonly used for retail products worldwide. The plot renders a scannable linear barcode encoding a 13-digit number with proper bar widths, guard patterns, and human-readable digits. This visualization is essential for product identification, inventory management, and point-of-sale systems.
""" anyplot.ai
barcode-ean13: EAN-13 Barcode
Library: seaborn 0.13.2 | Python 3.13.13
Quality: 86/100 | Updated: 2026-05-21
"""
import os
import matplotlib.pyplot as plt
import numpy as np
import seaborn as sns
# Theme tokens
THEME = os.getenv("ANYPLOT_THEME", "light")
PAGE_BG = "#FAF8F1" if THEME == "light" else "#1A1A17"
INK = "#1A1A17" if THEME == "light" else "#F0EFE8"
INK_SOFT = "#4A4A44" if THEME == "light" else "#B8B7B0"
# EAN-13 encoding tables
L_CODES = {
"0": "0001101",
"1": "0011001",
"2": "0010011",
"3": "0111101",
"4": "0100011",
"5": "0110001",
"6": "0101111",
"7": "0111011",
"8": "0110111",
"9": "0001011",
}
G_CODES = {
"0": "0100111",
"1": "0110011",
"2": "0011011",
"3": "0100001",
"4": "0011101",
"5": "0111001",
"6": "0000101",
"7": "0010001",
"8": "0001001",
"9": "0010111",
}
R_CODES = {
"0": "1110010",
"1": "1100110",
"2": "1101100",
"3": "1000010",
"4": "1011100",
"5": "1001110",
"6": "1010000",
"7": "1000100",
"8": "1001000",
"9": "1110100",
}
FIRST_DIGIT_PATTERNS = {
"0": "LLLLLL",
"1": "LLGLGG",
"2": "LLGGLG",
"3": "LLGGGL",
"4": "LGLLGG",
"5": "LGGLLG",
"6": "LGGGLL",
"7": "LGLGLG",
"8": "LGLGGL",
"9": "LGGLGL",
}
# Data
code = "4006381333931"
if len(code) == 12:
odd_sum = sum(int(code[i]) for i in range(0, 12, 2))
even_sum = sum(int(code[i]) for i in range(1, 12, 2))
check = (10 - (odd_sum + even_sum * 3) % 10) % 10
code = code + str(check)
# Build binary barcode pattern
first_digit = code[0]
barcode_binary = "101" # start guard
pattern = FIRST_DIGIT_PATTERNS[first_digit]
for i, digit in enumerate(code[1:7]):
barcode_binary += L_CODES[digit] if pattern[i] == "L" else G_CODES[digit]
barcode_binary += "01010" # center guard
for digit in code[7:13]:
barcode_binary += R_CODES[digit]
barcode_binary += "101" # end guard
quiet_zone = "0" * 9
barcode_with_quiet = quiet_zone + barcode_binary + quiet_zone
barcode_array = np.array([[int(b) for b in barcode_with_quiet]])
barcode_data = np.repeat(barcode_array, 60, axis=0)
# Set seaborn theme
sns.set_theme(style="white", rc={"figure.facecolor": PAGE_BG, "axes.facecolor": PAGE_BG, "text.color": INK})
# Plot — canonical 3200×1800 px
fig, ax = plt.subplots(figsize=(8, 4.5), dpi=400, facecolor=PAGE_BG)
ax.set_facecolor(PAGE_BG)
cmap = sns.color_palette([PAGE_BG, INK], as_cmap=True)
sns.heatmap(
barcode_data, cmap=cmap, cbar=False, xticklabels=False, yticklabels=False, linewidths=0, linecolor="none", ax=ax
)
for spine in ax.spines.values():
spine.set_visible(False)
# EAN-13 standard digit positioning:
# code[0] → left quiet zone (outside/left of start guard at col 9)
# code[1:7] → centered below left data section (cols 12–53)
# code[7:] → centered below right data section (cols 59–100)
digit_y = barcode_data.shape[0] + 7
text_kw = {"fontsize": 10, "fontfamily": "monospace", "fontweight": "bold", "va": "top", "color": INK}
ax.text(4.5, digit_y, code[0], ha="center", **text_kw)
ax.text(33.0, digit_y, code[1:7], ha="center", **text_kw)
ax.text(80.0, digit_y, code[7:], ha="center", **text_kw)
ax.set_xlim(-5, len(barcode_with_quiet) + 5)
ax.set_ylim(barcode_data.shape[0] + 18, -5)
ax.set_title("barcode-ean13 · python · seaborn · anyplot.ai", fontsize=12, fontweight="medium", color=INK, pad=10)
plt.tight_layout()
plt.savefig(f"plot-{THEME}.png", dpi=400, facecolor=PAGE_BG)
Part of EAN-13 Barcode on anyplot.ai.