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nonnegative_ssim added for MS_SSIM #33

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nonnegative_ssim added for MS_SSIM #33

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b7dd1de
nonnegative_ssim added for MS_SSIM
soumickmj Dec 8, 2021
7f204b4
Merge branch 'VainF:master' into master
soumickmj Jan 27, 2023
66997b0
up version
soumickmj Jan 27, 2023
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8 changes: 6 additions & 2 deletions pytorch_msssim/ssim.py
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Original file line number Diff line number Diff line change
Expand Up @@ -156,7 +156,7 @@ def ssim(


def ms_ssim(
X, Y, data_range=255, size_average=True, win_size=11, win_sigma=1.5, win=None, weights=None, K=(0.01, 0.03)
X, Y, data_range=255, size_average=True, win_size=11, win_sigma=1.5, win=None, weights=None, K=(0.01, 0.03), nonnegative_ssim=False,
):

r""" interface of ms-ssim
Expand Down Expand Up @@ -220,7 +220,8 @@ def ms_ssim(
X = avg_pool(X, kernel_size=2, padding=padding)
Y = avg_pool(Y, kernel_size=2, padding=padding)

ssim_per_channel = torch.relu(ssim_per_channel) # (batch, channel)
if nonnegative_ssim:
ssim_per_channel = torch.relu(ssim_per_channel) # (batch, channel)
mcs_and_ssim = torch.stack(mcs + [ssim_per_channel], dim=0) # (level, batch, channel)
ms_ssim_val = torch.prod(mcs_and_ssim ** weights.view(-1, 1, 1), dim=0)

Expand Down Expand Up @@ -284,6 +285,7 @@ def __init__(
spatial_dims=2,
weights=None,
K=(0.01, 0.03),
nonnegative_ssim=True,
):
r""" class for ms-ssim
Args:
Expand All @@ -303,6 +305,7 @@ def __init__(
self.data_range = data_range
self.weights = weights
self.K = K
self.nonnegative_ssim = nonnegative_ssim

def forward(self, X, Y):
return ms_ssim(
Expand All @@ -313,4 +316,5 @@ def forward(self, X, Y):
win=self.win,
weights=self.weights,
K=self.K,
nonnegative_ssim=self.nonnegative_ssim,
)
4 changes: 2 additions & 2 deletions setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@

setuptools.setup(
name="pytorch_msssim",
version="0.2.1",
version="0.2.2",
author="Gongfan Fang",
author_email="fgf@zju.edu.cn",
description="Fast and differentiable MS-SSIM and SSIM for pytorch.",
Expand All @@ -19,4 +19,4 @@
"Operating System :: OS Independent",
],
install_requires=['torch']
)
)