Help, I need to put a border on the image displayed from the code below. How do I do this? The code below pulls up the image, and now i need a border. Help.. All of this code is Python
# -*- coding: utf-8 -*- ''' LoganCaroline_1_4_7: Merge images ''' import matplotlib.pyplot as plt import os.path import numpy as np # “as” lets us use standard abbreviations '''Read the image data''' # Get the directory of this python script directory = os.path.dirname(os.path.abspath(__file__)) # Build an absolute filename from directory + filename filename = os.path.join(directory, 'family1.jpg') # Read the image data into an array img = plt.imread(filename) '''Show the image data''' # Create figure with 1 subplot fig, ax = plt.subplots(1, 1) # Show the image data in a subplot ax.imshow(img, interpolation='none') # Show the figure on the screen fig.show()
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Answer
Just create a slightly larger array that is black and fill the central pixels with your image.
import numpy as np
import matplotlib.pyplot as plt
def frame_image(img, frame_width):
b = frame_width # border size in pixel
ny, nx = img.shape[0], img.shape[1] # resolution / number of pixels in x and y
if img.ndim == 3: # rgb or rgba array
framed_img = np.zeros((b+ny+b, b+nx+b, img.shape[2]))
elif img.ndim == 2: # grayscale image
framed_img = np.zeros((b+ny+b, b+nx+b))
framed_img[b:-b, b:-b] = img
return framed_img
img = np.random.rand(456, 333, 3)
fig, (ax1, ax2) = plt.subplots(1,2)
ax1.imshow(img, interpolation='none')
ax2.imshow(frame_image(img, 20), interpolation='none')
plt.show()
