Created
January 6, 2022 17:17
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import numpy as np | |
import pandas as pd | |
import matplotlib.pyplot as plt | |
import matplotlib.image as mpimg | |
import matplotlib.patches as patches | |
import matplotlib.text as text | |
def rgb2gray(rgb): | |
return np.dot(rgb[...,:3], [0.2989, 0.5870, 0.1140]) | |
img = mpimg.imread('./image2.png') | |
gray = rgb2gray(img) | |
x = np.arange(1024+1)[1:] | |
final_x = [] | |
# x is some generator | |
for item in x: | |
final_x.append(x) | |
final_y = np.rot90(final_x,3) | |
vb_x = np.sum((gray)*final_x) / np.sum(gray) | |
vb_y = np.sum((gray)*final_y) / np.sum(gray) | |
fig, ax = plt.subplots() | |
ax.add_patch(patches.Rectangle((0.45*1024, 0.45*1024), 0.1*1024, 0.1*1024, linewidth=1, edgecolor='g', facecolor='none')) | |
ax.text(vb_x/1024, 0.98 - vb_y/1024, '(' + '{:.1f}'.format(vb_x) + ', ' + '{:.1f}'.format(vb_y) + ')', horizontalalignment='left',verticalalignment='top', transform=ax.transAxes, color='r') | |
plt.imshow(gray, cmap=plt.get_cmap('gray'), vmin=0, vmax=1) | |
plt.plot(vb_x,vb_y,color='red', marker='o') | |
plt.show() |
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