38 lines
874 B
Python
38 lines
874 B
Python
import cv2
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import matplotlib.pyplot as plt
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import math
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import numpy as np
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def createBox():
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box = np.zeros((100, 100), np.uint8) + 255
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print(type(box))
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shape = box.shape
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box = cv2.circle(box, (30, 50), 25, 0, -1)
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for i in range(shape[0]):
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for j in range(shape[1]):
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if j in range(45, 95) and i in range(25, 75):
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box[i, j] = 195
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return box
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def histogram(image):
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(row, col) = image.shape
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hist = [0] * 256
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for i in range(row):
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for j in range(col):
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hist[image[i, j]] += 1
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return hist
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if __name__ == "__main__":
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image0 = createBox()
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plt.figure()
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plt.subplot(1, 2, 1)
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plt.imshow(image0, vmin=0, vmax=255, cmap=plt.cm.gray)
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plt.title("idel image")
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image_hist0 = histogram(image0)
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plt.subplot(1, 2, 2)
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plt.bar(range(256), image_hist0)
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plt.show()
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