幾何学的変換

This examples demos some simple geometrical transformations on a Racoon face.

../../../_images/plot_geom_face_1.png

Python ソースコード: plot_geom_face.py

import numpy as np

import scipy.misc

from scipy import ndimage

import matplotlib.pyplot as plt



face = scipy.misc.face(gray=True)

lx, ly = face.shape

# Cropping

crop_face = face[lx/4:-lx/4, ly/4:-ly/4]

# up <-> down flip

flip_ud_face = np.flipud(face)

# rotation

rotate_face = ndimage.rotate(face, 45)

rotate_face_noreshape = ndimage.rotate(face, 45, reshape=False)



plt.figure(figsize=(12.5, 2.5))





plt.subplot(151)

plt.imshow(face, cmap=plt.cm.gray)

plt.axis('off')

plt.subplot(152)

plt.imshow(crop_face, cmap=plt.cm.gray)

plt.axis('off')

plt.subplot(153)

plt.imshow(flip_ud_face, cmap=plt.cm.gray)

plt.axis('off')

plt.subplot(154)

plt.imshow(rotate_face, cmap=plt.cm.gray)

plt.axis('off')

plt.subplot(155)

plt.imshow(rotate_face_noreshape, cmap=plt.cm.gray)

plt.axis('off')



plt.subplots_adjust(wspace=0.02, hspace=0.3, top=1, bottom=0.1, left=0,

                    right=1)



plt.show()

Total running time of the example: 0.78 seconds ( 0 minutes 0.78 seconds)