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my_metrics.py
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my_metrics.py
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from einops import rearrange
import torch
from torchmetrics.image.fid import FrechetInceptionDistance
from torchmetrics.image.inception import InceptionScore
from torchmetrics.image.kid import KernelInceptionDistance
from utils.torchmetric_fdd import FrechetDinovDistance
from utils.torchmetric_fvd import FrechetVideoDistance
from utils.torchmetric_prdc import PRDC
from utils.torchmetric_sfid import sFrechetInceptionDistance
import torch.nn.functional as F
class MyMetric:
def __init__(self, device="cuda", choices=["fid"], video_frame=None):
self.choices = choices
self.device = device
if "fid" in choices:
self._fid = FrechetInceptionDistance(
feature=2048,
reset_real_features=True,
normalize=False,
sync_on_compute=True,
).to(device)
if "is" in choices:
self._is = InceptionScore().to(device)
if "kid" in choices:
self._kid = KernelInceptionDistance(subset_size=50).to(device)
if "prdc" in choices:
self._prdc = PRDC(nearest_k=5).to(device)
if "sfid" in choices:
self._sfid = sFrechetInceptionDistance().to(device)
if "fdd" in choices:
self._fdd = FrechetDinovDistance().to(device)
if "fvd" in choices:
self._fvd = FrechetVideoDistance()
self.video_frame = video_frame
assert video_frame is not None, "video_frame is None"
def update_real(self, data, real=True):
self.update_fake_and_real(data, real)
def update_fake(self, data, real=False):
if "is" in self.choices:
self._is.update(data)
self.update_fake_and_real(data, real)
def update_fake_and_real(self, data, real):
if "fid" in self.choices:
self._fid.update(data, real=real)
if "kid" in self.choices:
self._kid.update(data, real=real)
if "prdc" in self.choices:
self._prdc.update(data, real=real)
if "sfid" in self.choices:
self._sfid.update(data, real=real)
if "fdd" in self.choices:
self._fdd.update(data, real=real)
if "fvd" in self.choices:
assert isinstance(data, torch.Tensor) and data.dtype == torch.uint8
# data is a torch.Tensor of type uint8
# data = (rearrange(data, "b t c h w -> b t h w c") / 255.0 - 0.5) * 2
data = rearrange(data, "(b t) c h w -> b t c h w", t=self.video_frame)
b, t, c, h, w = data.shape
data = rearrange(data, "b t c h w -> (b t) c h w").float()
data = F.interpolate(
data, size=(224, 224), mode="bilinear", align_corners=False
)
data = rearrange(data, "(b t) c h w -> b t h w c", t=t).float()
self._fvd.update(data.to(self.device), real=real)
def compute(self):
print("computing torchmetrics...")
_result = dict()
if "fid" in self.choices:
fid = self._fid.compute().item()
_result["num_real"] = self._fid.real_features_num_samples
_result["num_fake"] = self._fid.fake_features_num_samples
_result["fid"] = fid
if "is" in self.choices:
_is_mean, _is_std = self._is.compute()
_result["is"] = _is_mean.item()
if "kid" in self.choices:
_kid_mean, _kid_std = self._kid.compute()
_result["kid_mean"] = _kid_mean.item()
_result["kid_std"] = _kid_std.item()
if "prdc" in self.choices:
_prdc_result = self._prdc.compute()
_prdc_result = {f"prdc_{k}": v for k, v in _prdc_result.items()}
_result.update(_prdc_result)
if "sfid" in self.choices:
sfid = self._sfid.compute().item()
_result["sfid"] = sfid
if "fdd" in self.choices:
fdd = self._fdd.compute().item()
_result["fdd"] = fdd
if "fvd" in self.choices:
fvd = self._fvd.compute().item()
_result["fvd"] = fvd
return _result
def reset(self):
if "fid" in self.choices:
self._fid.reset()
if "is" in self.choices:
self._is.reset()
if "kid" in self.choices:
self._kid.reset()
if "prdc" in self.choices:
self._prdc.reset()
if "sfid" in self.choices:
self._sfid.reset()
if "fdd" in self.choices:
self._fdd.reset()
if "fvd" in self.choices:
self._fvd.reset()
if __name__ == "__main__":
_metric = MyMetric(
choices=["fid", "is", "kid", "prdc", "sfid", "fdd"],
)
_metric.update_real(
torch.randint(0, 255, (100, 3, 299, 299), dtype=torch.uint8).to("cuda")
)
_metric.update_fake(
torch.randint(0, 255, (100, 3, 299, 299), dtype=torch.uint8).to("cuda")
)
print(_metric.compute())