In [9]:

    

%matplotlib inline

import numpy as np
import matplotlib.pyplot as plt

from skimage import data
from skimage.feature import match_template


    

In [2]:

    

image = data.coins()
coin = image[170:220, 75:130]

result = match_template(image, coin)
ij = np.unravel_index(np.argmax(result), result.shape)
x, y = ij[::-1]

fig = plt.figure(figsize=(8, 3))
ax1 = plt.subplot(1, 3, 1)
ax2 = plt.subplot(1, 3, 2, adjustable='box-forced')
ax3 = plt.subplot(1, 3, 3, sharex=ax2, sharey=ax2, adjustable='box-forced')

ax1.imshow(coin)
ax1.set_axis_off()
ax1.set_title('template')

ax2.imshow(image)
ax2.set_axis_off()
ax2.set_title('image')
# highlight matched region
hcoin, wcoin = coin.shape
rect = plt.Rectangle((x, y), wcoin, hcoin, edgecolor='r', facecolor='none')
ax2.add_patch(rect)

ax3.imshow(result)
ax3.set_axis_off()
ax3.set_title('`match_template`\nresult')
# highlight matched region
ax3.autoscale(False)
ax3.plot(x, y, 'o', markeredgecolor='r', markerfacecolor='none', markersize=10)

plt.show()


    

In [10]:

    

def show_images(images,titles=None):
    """Display a list of images"""
    n_ims = len(images)
    if titles is None: titles = ['(%d)' % i for i in range(1,n_ims + 1)]
    fig = plt.figure()
    n = 1
    for image,title in zip(images,titles):
        a = fig.add_subplot(1,n_ims,n) # Make subplot
        if image.ndim == 2: # Is image grayscale?
            plt.gray() # Only place in this blog you can't replace 'gray' with 'grey'
        plt.imshow(image)
        a.set_title(title)
        n += 1
    fig.set_size_inches(np.array(fig.get_size_inches()) * n_ims)
    plt.show()


    

In [13]:

    

show_images(images=[coin, result], titles=['coin', 'result'])


    

In [14]:

    

skimage.exposure.equalize_hist


    

    




---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-14-ab0ddebe1b95> in <module>()
----> 1 skimage.exposure.equalize_hist

NameError: name 'skimage' is not defined

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