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stage2.py
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stage2.py
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import os
import sys
import random
import logging
import argparse
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
import torch.optim as optim
from torch.utils.data import DataLoader
from PIL import Image
from tqdm import tqdm
import data.transforms_bbox as Tr
from data.voc import VOC_box
from configs.defaults import _C
from models.ClsNet import Labeler, pad_for_grid
from utils.densecrf import DENSE_CRF
logger = logging.getLogger("stage2")
def main(cfg):
logger.setLevel(logging.DEBUG)
logger.propagate = False
formatter = logging.Formatter("[%(asctime)s] %(levelname)s: %(message)s", datefmt="%m/%d %H:%M:%S")
ch = logging.StreamHandler(stream=sys.stdout)
ch.setLevel(logging.DEBUG)
ch.setFormatter(formatter)
logger.addHandler(ch)
fh = logging.FileHandler(f"./logs/{cfg.NAME}.txt")
fh.setLevel(logging.DEBUG)
fh.setFormatter(formatter)
logger.addHandler(fh)
logger.info(" ".join(["\n{}: {}".format(k, v) for k,v in cfg.items()]))
if cfg.SEED:
np.random.seed(cfg.SEED)
torch.manual_seed(cfg.SEED)
random.seed(cfg.SEED)
os.environ["PYTHONHASHSEED"] = str(cfg.SEED)
tr_transforms = Tr.Normalize_Caffe()
trainset = VOC_box(cfg, tr_transforms)
train_loader = DataLoader(trainset, batch_size=1)
model = Labeler(cfg.DATA.NUM_CLASSES, cfg.MODEL.ROI_SIZE, cfg.MODEL.GRID_SIZE).cuda()
model.load_state_dict(torch.load(f"./weights/{cfg.MODEL.WEIGHTS}"))
WEIGHTS = torch.clone(model.classifier.weight.data)
model.eval()
bi_w, bi_xy_std, bi_rgb_std, pos_w, pos_xy_std = cfg.MODEL.DCRF
dCRF = DENSE_CRF(bi_w, bi_xy_std, bi_rgb_std, pos_w, pos_xy_std)
if cfg.SAVE_PSEUDO_LABLES:
folder_name = os.path.join(cfg.DATA.ROOT, cfg.NAME)
os.mkdir(folder_name)
save_paths = []
for txt in ("Y_crf", "Y_ret"):
sub_folder = folder_name + f"/{txt}"
os.mkdir(sub_folder)
save_paths += [os.path.join(sub_folder, "{}.png")]
logger.info(f"START {cfg.NAME} -->")
with torch.no_grad():
for it, (img, bboxes, bg_mask) in enumerate(tqdm(train_loader)):
'''
img : (1,3,H,W) float32
bboxes : (1,K,5) float32
bg_mask : (1,H,W) float32
'''
fn = trainset.filenames[it]
rgb_img = np.array(Image.open(trainset.img_path.format(fn)))
bboxes = bboxes[0] # (1,K,5) --> (K,5)
bg_mask = bg_mask[None] # (1,H,W) --> (1,1,H,W)
img_H, img_W = img.shape[-2:]
norm_H, norm_W = (img_H-1)/2, (img_W-1)/2
bboxes[:,[0,2]] = bboxes[:,[0,2]]*norm_W + norm_W
bboxes[:,[1,3]] = bboxes[:,[1,3]]*norm_H + norm_H
bboxes = bboxes.long()
gt_labels = bboxes[:,4].unique()
features = model.get_features(img.cuda())
features = F.interpolate(features, img.shape[-2:], mode='bilinear', align_corners=True)
padded_features = pad_for_grid(features, cfg.MODEL.GRID_SIZE)
padded_bg_mask = pad_for_grid(bg_mask.cuda(), cfg.MODEL.GRID_SIZE)
grid_bg, valid_gridIDs = model.get_grid_bg_and_IDs(padded_bg_mask, cfg.MODEL.GRID_SIZE)
bg_protos = model.get_bg_prototypes(padded_features, padded_bg_mask, grid_bg, cfg.MODEL.GRID_SIZE)
bg_protos = bg_protos[0,valid_gridIDs] # (1,GS**2,dims,1,1) --> (len(valid_gridIDs),dims,1,1)
normed_bg_p = F.normalize(bg_protos)
normed_f = F.normalize(features)
bg_attns = F.relu(torch.sum(normed_bg_p*normed_f, dim=1))
bg_attn = torch.mean(bg_attns, dim=0, keepdim=True) # (len(valid_gridIDs),H,W) --> (1,H,W)
bg_attn[bg_attn < cfg.MODEL.BG_THRESHOLD * bg_attn.max()] = 0
Bg_unary = torch.clone(bg_mask[0]) # (1,H,W)
region_inside_bboxes = Bg_unary[0]==0 # (H,W)
Bg_unary[:,region_inside_bboxes] = bg_attn[:,region_inside_bboxes].detach().cpu()
Fg_unary = []
for uni_cls in gt_labels:
w_c = WEIGHTS[uni_cls][None]
raw_cam = F.relu(torch.sum(w_c*features, dim=1)) # (1,H,W)
normed_cam = torch.zeros_like(raw_cam)
for wmin,hmin,wmax,hmax,_ in bboxes[bboxes[:,4]==uni_cls]:
denom = raw_cam[:,hmin:hmax,wmin:wmax].max() + 1e-12
normed_cam[:,hmin:hmax,wmin:wmax] = raw_cam[:,hmin:hmax,wmin:wmax] / denom
Fg_unary += [normed_cam]
Fg_unary = torch.cat(Fg_unary, dim=0).detach().cpu()
unary = torch.cat((Bg_unary,Fg_unary), dim=0)
unary[:,region_inside_bboxes] = torch.softmax(unary[:,region_inside_bboxes], dim=0)
refined_unary = dCRF.inference(rgb_img, unary.numpy())
# (Out of bboxes) reset Fg scores to zero
for idx_cls, uni_cls in enumerate(gt_labels,1):
mask = np.zeros((img_H,img_W))
for wmin,hmin,wmax,hmax,_ in bboxes[bboxes[:,4]==uni_cls]:
mask[hmin:hmax,wmin:wmax] = 1
refined_unary[idx_cls] *= mask
# Y_crf
tmp_mask = refined_unary.argmax(0)
Y_crf = np.zeros_like(tmp_mask, dtype=np.uint8)
for idx_cls, uni_cls in enumerate(gt_labels,1):
Y_crf[tmp_mask==idx_cls] = uni_cls
Y_crf[tmp_mask==0] = 0
# Y_ret
tmp_Y_crf = torch.from_numpy(Y_crf) # (H,W)
gt_labels_with_Bg = [0] + gt_labels.tolist()
corr_maps = []
for uni_cls in gt_labels_with_Bg:
indices = tmp_Y_crf==uni_cls
if indices.sum():
normed_p = F.normalize(features[...,indices].mean(dim=-1)) # (1,dims)
corr = F.relu((normed_f*normed_p[...,None,None]).sum(dim=1)) # (1,H,W)
else:
normed_w = F.normalize(WEIGHTS[uni_cls][None])
corr = F.relu((normed_f*normed_w).sum(dim=1)) # (1,H,W)
corr_maps.append(corr)
corr_maps = torch.cat(corr_maps) # (1+len(gt_labels),H,W)
# (Out of bboxes) reset Fg correlations to zero
for idx_cls, uni_cls in enumerate(gt_labels_with_Bg):
if uni_cls == 0:
corr_maps[idx_cls, ~region_inside_bboxes] = 1
else:
mask = torch.zeros(img_H,img_W).type_as(corr_maps)
for wmin,hmin,wmax,hmax,_ in bboxes[bboxes[:,4]==uni_cls]:
mask[hmin:hmax,wmin:wmax] = 1
corr_maps[idx_cls] *= mask
tmp_mask = corr_maps.argmax(0).detach().cpu().numpy()
Y_ret = np.zeros_like(tmp_mask, dtype=np.uint8)
for idx_cls, uni_cls in enumerate(gt_labels,1):
Y_ret[tmp_mask==idx_cls] = uni_cls
Y_ret[tmp_mask==0] = 0
if cfg.SAVE_PSEUDO_LABLES:
for pseudo, save_path in zip([Y_crf, Y_ret], save_paths):
Image.fromarray(pseudo).save(save_path.format(fn))
logger.info(f"END {cfg.NAME} -->")
def get_args():
parser = argparse.ArgumentParser()
parser.add_argument("--config-file")
parser.add_argument("--gpu-id", type=str, default="0", help="select a GPU index")
return parser.parse_args()
if __name__ == "__main__":
args = get_args()
os.environ['CUDA_VISIBLE_DEVICES'] = args.gpu_id
cfg = _C.clone()
cfg.merge_from_file(args.config_file)
cfg.freeze()
main(cfg)