hog特徴量を抽出して描画

a.py

import cv2
import matplotlib.pyplot as plt

from skimage.feature import hog
from skimage import color, exposure

img = cv2.imread('test2.png')
image = color.rgb2gray(img)

fd, hog_image = hog(image, orientations=9, pixels_per_cell=(8, 8), 
                cells_per_block=(3, 3), visualise=True)

hog_image_rescaled = exposure.rescale_intensity(hog_image, in_range=(0, 0.1))

plt.axis('off')
plt.imshow(image, cmap=plt.cm.gray)
plt.show()

plt.axis('off')
plt.imshow(hog_image_rescaled, cmap=plt.cm.gray)
plt.savefig("test3.png")
plt.show()