Vincentqyw
fix: cpu running
74659e4
raw
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import torch
from torch import nn
from torch.nn.parameter import Parameter
import torchvision.transforms as tvf
import torch.nn.functional as F
import numpy as np
def gather_nd(params, indices):
orig_shape = list(indices.shape)
num_samples = np.prod(orig_shape[:-1])
m = orig_shape[-1]
n = len(params.shape)
if m <= n:
out_shape = orig_shape[:-1] + list(params.shape)[m:]
else:
raise ValueError(
f"the last dimension of indices must less or equal to the rank of params. Got indices:{indices.shape}, params:{params.shape}. {m} > {n}"
)
indices = indices.reshape((num_samples, m)).transpose(0, 1).tolist()
output = params[indices] # (num_samples, ...)
return output.reshape(out_shape).contiguous()
# input: pos [kpt_n, 2]; inputs [H, W, 128] / [H, W]
# output: [kpt_n, 128] / [kpt_n]
def interpolate(pos, inputs, nd=True):
h = inputs.shape[0]
w = inputs.shape[1]
i = pos[:, 0]
j = pos[:, 1]
i_top_left = torch.clamp(torch.floor(i).int(), 0, h - 1)
j_top_left = torch.clamp(torch.floor(j).int(), 0, w - 1)
i_top_right = torch.clamp(torch.floor(i).int(), 0, h - 1)
j_top_right = torch.clamp(torch.ceil(j).int(), 0, w - 1)
i_bottom_left = torch.clamp(torch.ceil(i).int(), 0, h - 1)
j_bottom_left = torch.clamp(torch.floor(j).int(), 0, w - 1)
i_bottom_right = torch.clamp(torch.ceil(i).int(), 0, h - 1)
j_bottom_right = torch.clamp(torch.ceil(j).int(), 0, w - 1)
dist_i_top_left = i - i_top_left.float()
dist_j_top_left = j - j_top_left.float()
w_top_left = (1 - dist_i_top_left) * (1 - dist_j_top_left)
w_top_right = (1 - dist_i_top_left) * dist_j_top_left
w_bottom_left = dist_i_top_left * (1 - dist_j_top_left)
w_bottom_right = dist_i_top_left * dist_j_top_left
if nd:
w_top_left = w_top_left[..., None]
w_top_right = w_top_right[..., None]
w_bottom_left = w_bottom_left[..., None]
w_bottom_right = w_bottom_right[..., None]
interpolated_val = (
w_top_left * gather_nd(inputs, torch.stack([i_top_left, j_top_left], axis=-1))
+ w_top_right
* gather_nd(inputs, torch.stack([i_top_right, j_top_right], axis=-1))
+ w_bottom_left
* gather_nd(inputs, torch.stack([i_bottom_left, j_bottom_left], axis=-1))
+ w_bottom_right
* gather_nd(inputs, torch.stack([i_bottom_right, j_bottom_right], axis=-1))
)
return interpolated_val
def edge_mask(inputs, n_channel, dilation=1, edge_thld=5):
b, c, h, w = inputs.size()
device = inputs.device
dii_filter = torch.tensor([[0, 1.0, 0], [0, -2.0, 0], [0, 1.0, 0]]).view(1, 1, 3, 3)
dij_filter = 0.25 * torch.tensor(
[[1.0, 0, -1.0], [0, 0.0, 0], [-1.0, 0, 1.0]]
).view(1, 1, 3, 3)
djj_filter = torch.tensor([[0, 0, 0], [1.0, -2.0, 1.0], [0, 0, 0]]).view(1, 1, 3, 3)
dii = F.conv2d(
inputs.view(-1, 1, h, w),
dii_filter.to(device),
padding=dilation,
dilation=dilation,
).view(b, c, h, w)
dij = F.conv2d(
inputs.view(-1, 1, h, w),
dij_filter.to(device),
padding=dilation,
dilation=dilation,
).view(b, c, h, w)
djj = F.conv2d(
inputs.view(-1, 1, h, w),
djj_filter.to(device),
padding=dilation,
dilation=dilation,
).view(b, c, h, w)
det = dii * djj - dij * dij
tr = dii + djj
del dii, dij, djj
threshold = (edge_thld + 1) ** 2 / edge_thld
is_not_edge = torch.min(tr * tr / det <= threshold, det > 0)
return is_not_edge
# input: score_map [batch_size, 1, H, W]
# output: indices [2, k, 2], scores [2, k]
def extract_kpts(score_map, k=256, score_thld=0, edge_thld=0, nms_size=3, eof_size=5):
h = score_map.shape[2]
w = score_map.shape[3]
mask = score_map > score_thld
if nms_size > 0:
nms_mask = F.max_pool2d(
score_map, kernel_size=nms_size, stride=1, padding=nms_size // 2
)
nms_mask = torch.eq(score_map, nms_mask)
mask = torch.logical_and(nms_mask, mask)
if eof_size > 0:
eof_mask = torch.ones(
(1, 1, h - 2 * eof_size, w - 2 * eof_size),
dtype=torch.float32,
device=score_map.device,
)
eof_mask = F.pad(eof_mask, [eof_size] * 4, value=0)
eof_mask = eof_mask.bool()
mask = torch.logical_and(eof_mask, mask)
if edge_thld > 0:
non_edge_mask = edge_mask(score_map, 1, dilation=3, edge_thld=edge_thld)
mask = torch.logical_and(non_edge_mask, mask)
bs = score_map.shape[0]
if bs is None:
indices = torch.nonzero(mask)[0]
scores = gather_nd(score_map, indices)[0]
sample = torch.sort(scores, descending=True)[1][0:k]
indices = indices[sample].unsqueeze(0)
scores = scores[sample].unsqueeze(0)
else:
indices = []
scores = []
for i in range(bs):
tmp_mask = mask[i][0]
tmp_score_map = score_map[i][0]
tmp_indices = torch.nonzero(tmp_mask)
tmp_scores = gather_nd(tmp_score_map, tmp_indices)
tmp_sample = torch.sort(tmp_scores, descending=True)[1][0:k]
tmp_indices = tmp_indices[tmp_sample]
tmp_scores = tmp_scores[tmp_sample]
indices.append(tmp_indices)
scores.append(tmp_scores)
try:
indices = torch.stack(indices, dim=0)
scores = torch.stack(scores, dim=0)
except:
min_num = np.min([len(i) for i in indices])
indices = torch.stack([i[:min_num] for i in indices], dim=0)
scores = torch.stack([i[:min_num] for i in scores], dim=0)
return indices, scores
# input: [batch_size, C, H, W]
# output: [batch_size, C, H, W], [batch_size, C, H, W]
def peakiness_score(inputs, moving_instance_max, ksize=3, dilation=1):
inputs = inputs / moving_instance_max
batch_size, C, H, W = inputs.shape
pad_size = ksize // 2 + (dilation - 1)
kernel = torch.ones([C, 1, ksize, ksize], device=inputs.device) / (ksize * ksize)
pad_inputs = F.pad(inputs, [pad_size] * 4, mode="reflect")
avg_spatial_inputs = F.conv2d(
pad_inputs, kernel, stride=1, dilation=dilation, padding=0, groups=C
)
avg_channel_inputs = torch.mean(
inputs, axis=1, keepdim=True
) # channel dimension is 1
# print(avg_spatial_inputs.shape)
alpha = F.softplus(inputs - avg_spatial_inputs)
beta = F.softplus(inputs - avg_channel_inputs)
return alpha, beta
class DarkFeat(nn.Module):
default_config = {
"model_path": "",
"input_type": "raw-demosaic",
"kpt_n": 5000,
"kpt_refinement": True,
"score_thld": 0.5,
"edge_thld": 10,
"multi_scale": False,
"multi_level": True,
"nms_size": 3,
"eof_size": 5,
"need_norm": True,
"use_peakiness": True,
}
def __init__(
self,
model_path="",
inchan=3,
dilated=True,
dilation=1,
bn=True,
bn_affine=False,
):
super(DarkFeat, self).__init__()
inchan = (
3
if self.default_config["input_type"] == "rgb"
or self.default_config["input_type"] == "raw-demosaic"
else 1
)
self.config = {**self.default_config}
self.inchan = inchan
self.curchan = inchan
self.dilated = dilated
self.dilation = dilation
self.bn = bn
self.bn_affine = bn_affine
self.config["model_path"] = model_path
dim = 128
mchan = 4
self.conv0 = self._add_conv(8 * mchan)
self.conv1 = self._add_conv(8 * mchan, bn=False)
self.bn1 = self._make_bn(8 * mchan)
self.conv2 = self._add_conv(16 * mchan, stride=2)
self.conv3 = self._add_conv(16 * mchan, bn=False)
self.bn3 = self._make_bn(16 * mchan)
self.conv4 = self._add_conv(32 * mchan, stride=2)
self.conv5 = self._add_conv(32 * mchan)
# replace last 8x8 convolution with 3 3x3 convolutions
self.conv6_0 = self._add_conv(32 * mchan)
self.conv6_1 = self._add_conv(32 * mchan)
self.conv6_2 = self._add_conv(dim, bn=False, relu=False)
self.out_dim = dim
self.moving_avg_params = nn.ParameterList(
[
Parameter(torch.tensor(1.0), requires_grad=False),
Parameter(torch.tensor(1.0), requires_grad=False),
Parameter(torch.tensor(1.0), requires_grad=False),
]
)
self.clf = nn.Conv2d(128, 2, kernel_size=1)
state_dict = torch.load(self.config["model_path"], map_location="cpu")
new_state_dict = {}
for key in state_dict:
if (
"running_mean" not in key
and "running_var" not in key
and "num_batches_tracked" not in key
):
new_state_dict[key] = state_dict[key]
self.load_state_dict(new_state_dict)
print("Loaded DarkFeat model")
def _make_bn(self, outd):
return nn.BatchNorm2d(outd, affine=self.bn_affine, track_running_stats=False)
def _add_conv(
self,
outd,
k=3,
stride=1,
dilation=1,
bn=True,
relu=True,
k_pool=1,
pool_type="max",
bias=False,
):
d = self.dilation * dilation
conv_params = dict(
padding=((k - 1) * d) // 2, dilation=d, stride=stride, bias=bias
)
ops = nn.ModuleList([])
ops.append(nn.Conv2d(self.curchan, outd, kernel_size=k, **conv_params))
if bn and self.bn:
ops.append(self._make_bn(outd))
if relu:
ops.append(nn.ReLU(inplace=True))
self.curchan = outd
if k_pool > 1:
if pool_type == "avg":
ops.append(torch.nn.AvgPool2d(kernel_size=k_pool))
elif pool_type == "max":
ops.append(torch.nn.MaxPool2d(kernel_size=k_pool))
else:
print(f"Error, unknown pooling type {pool_type}...")
return nn.Sequential(*ops)
def forward(self, input):
"""Compute keypoints, scores, descriptors for image"""
data = input["image"]
H, W = data.shape[2:]
if self.config["input_type"] == "rgb":
# 3-channel rgb
RGB_mean = [0.485, 0.456, 0.406]
RGB_std = [0.229, 0.224, 0.225]
norm_RGB = tvf.Normalize(mean=RGB_mean, std=RGB_std)
data = norm_RGB(data)
elif self.config["input_type"] == "gray":
# 1-channel
data = torch.mean(data, dim=1, keepdim=True)
norm_gray0 = tvf.Normalize(mean=data.mean(), std=data.std())
data = norm_gray0(data)
elif self.config["input_type"] == "raw":
# 4-channel
pass
elif self.config["input_type"] == "raw-demosaic":
# 3-channel
pass
else:
raise NotImplementedError()
# x: [N, C, H, W]
x0 = self.conv0(data)
x1 = self.conv1(x0)
x1_bn = self.bn1(x1)
x2 = self.conv2(x1_bn)
x3 = self.conv3(x2)
x3_bn = self.bn3(x3)
x4 = self.conv4(x3_bn)
x5 = self.conv5(x4)
x6_0 = self.conv6_0(x5)
x6_1 = self.conv6_1(x6_0)
x6_2 = self.conv6_2(x6_1)
comb_weights = torch.tensor([1.0, 2.0, 3.0], device=data.device)
comb_weights /= torch.sum(comb_weights)
ksize = [3, 2, 1]
det_score_maps = []
for idx, xx in enumerate([x1, x3, x6_2]):
alpha, beta = peakiness_score(
xx, self.moving_avg_params[idx].detach(), ksize=3, dilation=ksize[idx]
)
score_vol = alpha * beta
det_score_map = torch.max(score_vol, dim=1, keepdim=True)[0]
det_score_map = F.interpolate(
det_score_map, size=data.shape[2:], mode="bilinear", align_corners=True
)
det_score_map = comb_weights[idx] * det_score_map
det_score_maps.append(det_score_map)
det_score_map = torch.sum(torch.stack(det_score_maps, dim=0), dim=0)
desc = x6_2
score_map = det_score_map
conf = F.softmax(self.clf((desc) ** 2), dim=1)[:, 1:2]
score_map = score_map * F.interpolate(
conf, size=score_map.shape[2:], mode="bilinear", align_corners=True
)
kpt_inds, kpt_score = extract_kpts(
score_map,
k=self.config["kpt_n"],
score_thld=self.config["score_thld"],
nms_size=self.config["nms_size"],
eof_size=self.config["eof_size"],
edge_thld=self.config["edge_thld"],
)
descs = (
F.normalize(
interpolate(kpt_inds.squeeze(0) / 4, desc.squeeze(0).permute(1, 2, 0)),
p=2,
dim=-1,
)
.detach()
.cpu()
.numpy(),
)
kpts = np.squeeze(
torch.stack([kpt_inds[:, :, 1], kpt_inds[:, :, 0]], dim=-1).cpu(), axis=0
) * np.array([W / data.shape[3], H / data.shape[2]], dtype=np.float32)
scores = np.squeeze(kpt_score.detach().cpu().numpy(), axis=0)
idxs = np.negative(scores).argsort()[0 : self.config["kpt_n"]]
descs = descs[0][idxs]
kpts = kpts[idxs]
scores = scores[idxs]
return {
"keypoints": kpts,
"scores": torch.from_numpy(scores),
"descriptors": torch.from_numpy(descs.T),
}