November 2018
Intermediate to advanced
492 pages
12h 19m
English
Content preview from Hands-On Image Processing with Python
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Reconstructing an image only from its Laplacian pyramid
The following diagram shows how to reconstruct an image from only its Laplacian pyramid, if we construct one by following the algorithms described in the previous section:
Take a look at the following code block:
def reconstruct_image_from_laplacian_pyramid(pyramid): i = len(pyramid) - 2 prev = pyramid[i+1] pylab.figure(figsize=(20,20)) j = 1 while i >= 0: prev = resize(pyramid_expand(prev, upscale=2), pyramid[i].shape) im = np.clip(pyramid[i] + prev,0,1) pylab.subplot(3,3,j), pylab.imshow(im) pylab.title('Level=' + str(j) + ' ' + str(im.shape[0]) + 'x' + str(im.shape[1]), size=20) prev ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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