How to produce a barcode in Matplotlib?

To produce a barcode in Matplotlib, we can take the following steps −

Set the figure size and adjust the padding between and around the subplots.
Make a list of binary numbers, i.e., 0s and 1s.
Create a new figure or activate an existing figure with dpi=100
Add an axes to the figure.
Turn off the axes.
Use imshow() method to plot the data from step 2.
To display the figure, use show() method.

Example

import matplotlib.pyplot as plt
import numpy as np

plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True

code = np.array([
   1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1,
   0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0,
   1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1,
   1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1])

fig = plt.figure(dpi=100)

ax = fig.add_axes([0, 0, 1, 1])
ax.set_axis_off()

ax.imshow(code.reshape(1, -1), cmap='binary', aspect='auto',
         interpolation='nearest')

plt.show()

Output

Rishikesh Kumar Rishi

Updated on 18-Jun-2021 10:31:51

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