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Add more detailed description for pyramid functions

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This commit is contained in:
Johannes Schönberger
2012-09-15 10:58:28 +02:00
parent bfcc144699
commit be7476b44f
1 changed files with 15 additions and 3 deletions
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skimage/transform/pyramids.py
+15 -3
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@@ -140,8 +140,12 @@ def pyramid_gaussian(image, max_layer=-1, downscale=2, sigma=None, order=1,
"""Yield images of the gaussian pyramid formed by the input image.
Recursively applies the `pyramid_reduce` function to the image, and yields
the downscaled images. Note that the first image of the pyramid will be the
original, unscaled image.
the downscaled images.
Note that the first image of the pyramid will be the original, unscaled
image. The total number of images is `max_layer + 1`. In case all layers are
computed, the last image is either a one-pixel image or the image where the
reduction does not change its shape.
Parameters
----------
@@ -214,7 +218,15 @@ def pyramid_laplacian(image, max_layer=-1, downscale=2, sigma=None, order=1,
"""Yield images of the laplacian pyramid formed by the input image.
Each layer contains the difference between the downsampled and the
downsampled plus smoothed image.
downsampled, smoothed image::
layer = resize(prev_layer) - smooth(resize(prev_layer))
Note that the first image of the pyramid will be the difference between the
original, unscaled image and its smoothed version. The total number of
images is `max_layer + 1`. In case all layers are computed, the last image
is either a one-pixel image or the image where the reduction does not change
its shape.
Parameters
----------