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temporal_transforms_adap.py
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temporal_transforms_adap.py
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import random
import math
class LoopPadding(object):
def __init__(self, size):
self.size = size
def __call__(self, frame_indices):
out = frame_indices
for index in out:
if len(out) >= self.size:
break
out.append(index)
return out
class TemporalBeginCrop(object):
"""Temporally crop the given frame indices at a beginning.
If the number of frames is less than the size,
loop the indices as many times as necessary to satisfy the size.
Args:
size (int): Desired output size of the crop.
"""
def __init__(self, size):
self.size = size
def __call__(self, frame_indices):
rand_end = max(0, len(frame_indices) - self.size - 1)
if rand_end > 0:
out = frame_indices[:self.size]
else:
out = []
extra_pad = self.size % len(frame_indices)
repi = [self.size//len(frame_indices)] * len(frame_indices)
for index in range(len(frame_indices)):
buf = 1 if extra_pad > 0 else 0
extra_pad -= 1
for i in range(repi[index]+buf):
out.append(frame_indices[index])
# for index in out:
# if len(out) >= self.size:
# break
# out.append(index)
return out
class TemporalCenterCrop(object):
"""Temporally crop the given frame indices at a center.
If the number of frames is less than the size,
loop the indices as many times as necessary to satisfy the size.
Args:
size (int): Desired output size of the crop.
"""
def __init__(self, size):
self.size = size
def __call__(self, frame_indices):
"""
Args:
frame_indices (list): frame indices to be cropped.
Returns:
list: Cropped frame indices.
"""
rand_end = max(0, len(frame_indices) - self.size - 1)
if rand_end > 0:
center_index = len(frame_indices) // 2
begin_index = max(0, center_index - (self.size // 2))
end_index = min(begin_index + self.size, len(frame_indices))
out = frame_indices[begin_index:end_index]
else:
out = []
extra_pad = self.size % len(frame_indices)
repi = [self.size//len(frame_indices)] * len(frame_indices)
for index in range(len(frame_indices)):
buf = 1 if extra_pad > 0 else 0
extra_pad -= 1
for i in range(repi[index]+buf):
out.append(frame_indices[index])
# for index in out:
# if len(out) >= self.size:
# break
# out.append(index)
return out
class TemporalRandomCrop(object):
"""Temporally crop the given frame indices at a random location.
If the number of frames is less than the size,
loop the indices as many times as necessary to satisfy the size.
Args:
size (int): Desired output size of the crop.
"""
def __init__(self, size):
self.size = size
def __call__(self, frame_indices):
"""
Args:
frame_indices (list): frame indices to be cropped.
Returns:
list: Cropped frame indices.
"""
rand_end = max(0, len(frame_indices) - self.size - 1)
if rand_end > 0:
begin_index = random.randint(0, rand_end)
end_index = min(begin_index + self.size, len(frame_indices))
out = frame_indices[begin_index:end_index]
else:
out = []
extra_pad = self.size % len(frame_indices)
repi = [self.size//len(frame_indices)] * len(frame_indices)
for index in range(len(frame_indices)):
buf = 1 if extra_pad > 0 else 0
extra_pad -= 1
for i in range(repi[index]+buf):
out.append(frame_indices[index])
# for index in out:
# if len(out) >= self.size:
# break
# out.append(index)
return out
class TemporalPadRandomCrop(object):
"""Temporally crop the given frame indices at a random location.
If the number of frames is less than the size,
loop the indices as many times as necessary to satisfy the size.
Args:
size (int): Desired output size of the crop.
"""
def __init__(self, size, pad):
self.size = size
self.pad = pad
def __call__(self, frame_list):
"""
Args:
frame_indices (list): frame indices to be cropped.
Returns:
list: Cropped frame indices.
"""
begin_t = frame_list[0] - self.pad
end_t = frame_list[-1] + self.pad
frame_indices = list(range(begin_t, end_t + 1))
rand_end = max(0, len(frame_indices) - self.size - 1)
if rand_end > 0:
begin_index = random.randint(0, rand_end)
end_index = min(begin_index + self.size, len(frame_indices))
out = frame_indices[begin_index:end_index]
else:
out = []
extra_pad = self.size % len(frame_indices)
repi = [self.size//len(frame_indices)] * len(frame_indices)
for index in range(len(frame_indices)):
buf = 1 if extra_pad > 0 else 0
extra_pad -= 1
for i in range(repi[index]+buf):
out.append(frame_indices[index])
# for index in out:
# if len(out) >= self.size:
# break
# out.append(index)
return out