/
lineless_table_process.py
449 lines (368 loc) · 15.8 KB
/
lineless_table_process.py
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# ------------------------------------------------------------------------------
# Part of implementation is adopted from CenterNet,
# made publicly available under the MIT License at https://github.com/xingyizhou/CenterNet.git
# ------------------------------------------------------------------------------
import cv2
import numpy as np
import shapely
import torch
import torch.nn as nn
from shapely.geometry import MultiPoint, Point, Polygon
def _gather_feat(feat, ind, mask=None):
# mandatory
dim = feat.size(2)
ind = ind.unsqueeze(2).expand(ind.size(0), ind.size(1), dim)
feat = feat.gather(1, ind)
if mask is not None:
mask = mask.unsqueeze(2).expand_as(feat)
feat = feat[mask]
feat = feat.view(-1, dim)
return feat
def _tranpose_and_gather_feat(feat, ind):
# mandatory
feat = feat.permute(0, 2, 3, 1).contiguous()
feat = feat.view(feat.size(0), -1, feat.size(3))
feat = _gather_feat(feat, ind)
return feat
def _get_4ps_feat(cc_match, output):
# mandatory
if isinstance(output, dict):
feat = output['cr']
else:
feat = output
feat = feat.permute(0, 2, 3, 1).contiguous()
feat = feat.contiguous().view(feat.size(0), -1, feat.size(3))
feat = feat.unsqueeze(3).expand(
feat.size(0), feat.size(1), feat.size(2), 4)
dim = feat.size(2)
cc_match = cc_match.unsqueeze(2).expand(
cc_match.size(0), cc_match.size(1), dim, cc_match.size(2))
if not (isinstance(output, dict)):
cc_match = torch.where(
cc_match < feat.shape[1], cc_match, (feat.shape[0] - 1)
* torch.ones(cc_match.shape).to(torch.int64).cuda())
cc_match = torch.where(
cc_match >= 0, cc_match,
torch.zeros(cc_match.shape).to(torch.int64).cuda())
feat = feat.gather(1, cc_match)
return feat
def _nms(heat, name, kernel=3):
pad = (kernel - 1) // 2
hmax = nn.functional.max_pool2d(
heat, (kernel, kernel), stride=1, padding=pad)
# save_map(hmax.cpu().numpy()[0],name)
keep = (hmax == heat).float()
return heat * keep, keep
def _topk(scores, K=40):
batch, cat, height, width = scores.size()
topk_scores, topk_inds = torch.topk(scores.view(batch, cat, -1), K)
topk_inds = topk_inds % (
torch.Tensor([height]).to(torch.int64).cuda()
* torch.Tensor([width]).to(torch.int64).cuda())
topk_ys = (topk_inds / torch.Tensor([width]).cuda()).int().float()
topk_xs = (topk_inds
% torch.Tensor([width]).to(torch.int64).cuda()).int().float()
topk_score, topk_ind = torch.topk(topk_scores.view(batch, -1), K)
topk_clses = (topk_ind // K).int()
topk_inds = _gather_feat(topk_inds.view(batch, -1, 1),
topk_ind).view(batch, K)
topk_ys = _gather_feat(topk_ys.view(batch, -1, 1), topk_ind).view(batch, K)
topk_xs = _gather_feat(topk_xs.view(batch, -1, 1), topk_ind).view(batch, K)
return topk_score, topk_inds, topk_clses, topk_ys, topk_xs
def corner_decode(mk, st_reg, mk_reg=None, K=400):
batch, cat, height, width = mk.size()
mk, keep = _nms(mk, 'mk.0.maxpool')
scores, inds, clses, ys, xs = _topk(mk, K=K)
if mk_reg is not None:
reg = _tranpose_and_gather_feat(mk_reg, inds)
reg = reg.view(batch, K, 2)
xs = xs.view(batch, K, 1) + reg[:, :, 0:1]
ys = ys.view(batch, K, 1) + reg[:, :, 1:2]
else:
xs = xs.view(batch, K, 1) + 0.5
ys = ys.view(batch, K, 1) + 0.5
scores = scores.view(batch, K, 1)
st_Reg = _tranpose_and_gather_feat(st_reg, inds)
bboxes_vec = [
xs - st_Reg[..., 0:1], ys - st_Reg[..., 1:2], xs - st_Reg[..., 2:3],
ys - st_Reg[..., 3:4], xs - st_Reg[..., 4:5], ys - st_Reg[..., 5:6],
xs - st_Reg[..., 6:7], ys - st_Reg[..., 7:8]
]
bboxes = torch.cat(bboxes_vec, dim=2)
corner_dict = {
'scores': scores,
'inds': inds,
'ys': ys,
'xs': xs,
'gboxes': bboxes
}
return scores, inds, ys, xs, bboxes, corner_dict
def ctdet_4ps_decode(heat,
wh,
ax,
cr,
corner_dict=None,
reg=None,
cat_spec_wh=False,
K=100,
wiz_rev=False):
batch, cat, height, width = heat.size()
# heat = torch.sigmoid(heat)
# perform nms on heatmaps
heat, keep = _nms(heat, 'hm.0.maxpool')
scores, inds, clses, ys, xs = _topk(heat, K=K)
if reg is not None:
reg = _tranpose_and_gather_feat(reg, inds)
reg = reg.view(batch, K, 2)
xs = xs.view(batch, K, 1) + reg[:, :, 0:1]
ys = ys.view(batch, K, 1) + reg[:, :, 1:2]
else:
xs = xs.view(batch, K, 1) + 0.5
ys = ys.view(batch, K, 1) + 0.5
wh = _tranpose_and_gather_feat(wh, inds)
ax = _tranpose_and_gather_feat(ax, inds)
if cat_spec_wh:
wh = wh.view(batch, K, cat, 8)
clses_ind = clses.view(batch, K, 1, 1).expand(batch, K, 1, 8).long()
wh = wh.gather(2, clses_ind).view(batch, K, 8)
else:
wh = wh.view(batch, K, 8)
clses = clses.view(batch, K, 1).float()
scores = scores.view(batch, K, 1)
bboxes_vec = [
xs - wh[..., 0:1], ys - wh[..., 1:2], xs - wh[..., 2:3],
ys - wh[..., 3:4], xs - wh[..., 4:5], ys - wh[..., 5:6],
xs - wh[..., 6:7], ys - wh[..., 7:8]
]
bboxes = torch.cat(bboxes_vec, dim=2)
cc_match = torch.cat(
[(xs - wh[..., 0:1]) + width * torch.round(ys - wh[..., 1:2]),
(xs - wh[..., 2:3]) + width * torch.round(ys - wh[..., 3:4]),
(xs - wh[..., 4:5]) + width * torch.round(ys - wh[..., 5:6]),
(xs - wh[..., 6:7]) + width * torch.round(ys - wh[..., 7:8])],
dim=2)
cc_match = torch.round(cc_match).to(torch.int64)
cr_feat = _get_4ps_feat(cc_match, cr)
cr_feat = cr_feat.sum(axis=3)
detections = torch.cat([bboxes, scores, clses], dim=2)
return detections, keep, ax, cr_feat
def get_3rd_point(a, b):
direct = a - b
return b + np.array([-direct[1], direct[0]], dtype=np.float32)
def affine_transform(pt, t):
new_pt = np.array([pt[0], pt[1], 1.], dtype=np.float32).T
new_pt = np.dot(t, new_pt)
return new_pt[:2]
def get_dir(src_point, rot_rad):
sn, cs = np.sin(rot_rad), np.cos(rot_rad)
src_result = [0, 0]
src_result[0] = src_point[0] * cs - src_point[1] * sn
src_result[1] = src_point[0] * sn + src_point[1] * cs
return src_result
def get_affine_transform(center,
scale,
rot,
output_size,
shift=np.array([0, 0], dtype=np.float32),
inv=0):
if not isinstance(scale, np.ndarray) and not isinstance(scale, list):
scale = np.array([scale, scale], dtype=np.float32)
scale_tmp = scale
src_w = scale_tmp[0]
dst_w = output_size[0]
dst_h = output_size[1]
rot_rad = np.pi * rot / 180
src_dir = get_dir([0, src_w * -0.5], rot_rad)
dst_dir = np.array([0, dst_w * -0.5], np.float32)
src = np.zeros((3, 2), dtype=np.float32)
dst = np.zeros((3, 2), dtype=np.float32)
src[0, :] = center + scale_tmp * shift # [0,0] #
src[1, :] = center + src_dir + scale_tmp * shift # scale #
dst[0, :] = [dst_w * 0.5, dst_h * 0.5] # [0,0] #
dst[1, :] = np.array([dst_w * 0.5, dst_h * 0.5],
np.float32) + dst_dir # output_size #
src[2:, :] = get_3rd_point(src[0, :], src[1, :])
dst[2:, :] = get_3rd_point(dst[0, :], dst[1, :])
if inv:
trans = cv2.getAffineTransform(np.float32(dst), np.float32(src))
else:
trans = cv2.getAffineTransform(np.float32(src), np.float32(dst))
return trans
def get_affine_transform_upper_left(center,
scale,
rot,
output_size,
shift=np.array([0, 0], dtype=np.float32),
inv=0):
if not isinstance(scale, np.ndarray) and not isinstance(scale, list):
scale = np.array([scale, scale], dtype=np.float32)
src = np.zeros((3, 2), dtype=np.float32)
dst = np.zeros((3, 2), dtype=np.float32)
src[0, :] = center
dst[0, :] = [0, 0]
if center[0] < center[1]:
src[1, :] = [scale[0], center[1]]
dst[1, :] = [output_size[0], 0]
else:
src[1, :] = [center[0], scale[0]]
dst[1, :] = [0, output_size[0]]
src[2:, :] = get_3rd_point(src[0, :], src[1, :])
dst[2:, :] = get_3rd_point(dst[0, :], dst[1, :])
if inv:
trans = cv2.getAffineTransform(np.float32(dst), np.float32(src))
else:
trans = cv2.getAffineTransform(np.float32(src), np.float32(dst))
return trans
def transform_preds(coords, center, scale, output_size, rot=0):
target_coords = np.zeros(coords.shape)
trans = get_affine_transform(center, scale, rot, output_size, inv=1)
for p in range(coords.shape[0]):
target_coords[p, 0:2] = affine_transform(coords[p, 0:2], trans)
return target_coords
def transform_preds_upper_left(coords, center, scale, output_size, rot=0):
target_coords = np.zeros(coords.shape)
trans = get_affine_transform_upper_left(
center, scale, rot, output_size, inv=1)
for p in range(coords.shape[0]):
target_coords[p, 0:2] = affine_transform(coords[p, 0:2], trans)
return target_coords
def ctdet_4ps_post_process_upper_left(dets, c, s, h, w, num_classes, rot=0):
# dets: batch x max_dets x dim
# return 1-based class det dict
ret = []
for i in range(dets.shape[0]):
top_preds = {}
dets[i, :, 0:2] = transform_preds_upper_left(dets[i, :, 0:2], c[i],
s[i], (w, h), rot)
dets[i, :, 2:4] = transform_preds_upper_left(dets[i, :, 2:4], c[i],
s[i], (w, h), rot)
dets[i, :, 4:6] = transform_preds_upper_left(dets[i, :, 4:6], c[i],
s[i], (w, h), rot)
dets[i, :, 6:8] = transform_preds_upper_left(dets[i, :, 6:8], c[i],
s[i], (w, h), rot)
classes = dets[i, :, -1]
for j in range(num_classes):
inds = (classes == j)
tmp_top_pred = [
dets[i, inds, :8].astype(np.float32),
dets[i, inds, 8:9].astype(np.float32)
]
top_preds[j + 1] = np.concatenate(tmp_top_pred, axis=1).tolist()
ret.append(top_preds)
return ret
def ctdet_corner_post_process(corner_st_reg, c, s, h, w, num_classes):
for i in range(corner_st_reg.shape[0]):
corner_st_reg[i, :, 0:2] = transform_preds(corner_st_reg[i, :, 0:2],
c[i], s[i], (w, h))
corner_st_reg[i, :, 2:4] = transform_preds(corner_st_reg[i, :, 2:4],
c[i], s[i], (w, h))
corner_st_reg[i, :, 4:6] = transform_preds(corner_st_reg[i, :, 4:6],
c[i], s[i], (w, h))
corner_st_reg[i, :, 6:8] = transform_preds(corner_st_reg[i, :, 6:8],
c[i], s[i], (w, h))
corner_st_reg[i, :, 8:10] = transform_preds(corner_st_reg[i, :, 8:10],
c[i], s[i], (w, h))
return corner_st_reg
def merge_outputs(detections):
# thresh_conf, thresh_min, thresh_max = 0.1, 0.5, 0.7
num_classes, max_per_image = 2, 3000
results = {}
for j in range(1, num_classes + 1):
results[j] = np.concatenate([detection[j] for detection in detections],
axis=0).astype(np.float32)
scores = np.hstack([results[j][:, 8] for j in range(1, num_classes + 1)])
if len(scores) > max_per_image:
kth = len(scores) - max_per_image
thresh = np.partition(scores, kth)[kth]
for j in range(1, num_classes + 1):
keep_inds = (results[j][:, 8] >= thresh)
results[j] = results[j][keep_inds]
return results
def filter(results, logi, ps):
# this function select boxes
batch_size, feat_dim = logi.shape[0], logi.shape[2]
num_valid = sum(results[1][:, 8] >= 0.15)
slct_logi = np.zeros((batch_size, num_valid, feat_dim), dtype=np.float32)
slct_dets = np.zeros((batch_size, num_valid, 8), dtype=np.int32)
for i in range(batch_size):
for j in range(num_valid):
slct_logi[i, j, :] = logi[i, j, :].cpu()
slct_dets[i, j, :] = ps[i, j, :].cpu()
return torch.Tensor(slct_logi).cuda(), torch.Tensor(slct_dets).cuda()
def normalized_ps(ps, vocab_size):
ps = torch.round(ps).to(torch.int64)
ps = torch.where(ps < vocab_size, ps, (vocab_size - 1)
* torch.ones(ps.shape).to(torch.int64).cuda())
ps = torch.where(ps >= 0, ps, torch.zeros(ps.shape).to(torch.int64).cuda())
return ps
def process_detect_output(output, meta):
K, MK = 3000, 5000
num_classes = 2
scale = 1.0
hm = output['hm'].sigmoid_()
wh = output['wh']
reg = output['reg']
st = output['st']
ax = output['ax']
cr = output['cr']
scores, inds, ys, xs, st_reg, corner_dict = corner_decode(
hm[:, 1:2, :, :], st, reg, K=MK)
dets, keep, logi, cr = ctdet_4ps_decode(
hm[:, 0:1, :, :], wh, ax, cr, corner_dict, reg=reg, K=K, wiz_rev=False)
raw_dets = dets
dets = dets.detach().cpu().numpy()
dets = dets.reshape(1, -1, dets.shape[2])
dets = ctdet_4ps_post_process_upper_left(dets.copy(),
[meta['c'].cpu().numpy()],
[meta['s']], meta['out_height'],
meta['out_width'], 2)
for j in range(1, num_classes + 1):
dets[0][j] = np.array(dets[0][j], dtype=np.float32).reshape(-1, 9)
dets[0][j][:, :8] /= scale
dets = dets[0]
detections = [dets]
logi = logi + cr
results = merge_outputs(detections)
slct_logi_feat, slct_dets_feat = filter(results, logi, raw_dets[:, :, :8])
slct_dets_feat = normalized_ps(slct_dets_feat, 256)
slct_output_dets = results[1][:slct_logi_feat.shape[1], :8]
return slct_logi_feat, slct_dets_feat, slct_output_dets
def process_logic_output(logi):
logi_floor = logi.floor()
dev = logi - logi_floor
logi = torch.where(dev > 0.5, logi_floor + 1, logi_floor)
return logi
def load_lore_model(model, checkpoint, mtype):
state_dict_ = checkpoint['state_dict']
state_dict = {}
# convert data_parallal to model
for k in state_dict_:
if k.startswith('module') and not k.startswith('module_list'):
state_dict[k[7:]] = state_dict_[k]
else:
if mtype == 'model':
if k.startswith('model'):
state_dict[k[6:]] = state_dict_[k]
else:
continue
else:
if k.startswith('processor'):
state_dict[k[10:]] = state_dict_[k]
else:
continue
model_state_dict = model.state_dict()
# check loaded parameters and created model parameters
for k in state_dict:
if k in model_state_dict:
if state_dict[k].shape != model_state_dict[k].shape:
print('Skip loading parameter {}, required shape{}, '
'loaded shape{}.'.format(k, model_state_dict[k].shape,
state_dict[k].shape))
state_dict[k] = model_state_dict[k]
else:
print('Drop parameter {}.'.format(k))
for k in model_state_dict:
if not (k in state_dict):
print('No param {}.'.format(k))
state_dict[k] = model_state_dict[k]
model.load_state_dict(state_dict, strict=False)