Skip to content

Inconsistent size returned from waverec2 #725

@landmanbester

Description

@landmanbester

The output of waverec2 is not always consistent with the input of wavedec2. For example, the following

import numpy as np
import pywt
nx = 129
ny = 255
data = np.random.randn(nx, ny)
alpha = pywt.wavedec2(data, 'db1', mode='zero', level=1)
xrec = pywt.waverec2(alpha, 'db1', mode='zero')
print(data.shape, xrec.shape)
print(np.abs(data - xrec[0:data.shape[0],0:data.shape[1]]).max())

produces

(129, 255) (130, 256)
1.7763568394002505e-15

They do at least seem to be consistent within the overlap region. Is this the expected behaviour?

Metadata

Metadata

Assignees

No one assigned

    Labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions