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Multi-scale testing #804
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MODEL: | ||
META_ARCHITECTURE: "GeneralizedRCNN" | ||
WEIGHT: "catalog://ImageNetPretrained/MSRA/R-50" | ||
BACKBONE: | ||
CONV_BODY: "R-50-FPN" | ||
RESNETS: | ||
BACKBONE_OUT_CHANNELS: 256 | ||
RPN: | ||
USE_FPN: True | ||
ANCHOR_STRIDE: (4, 8, 16, 32, 64) | ||
PRE_NMS_TOP_N_TRAIN: 2000 | ||
PRE_NMS_TOP_N_TEST: 1000 | ||
POST_NMS_TOP_N_TEST: 1000 | ||
FPN_POST_NMS_TOP_N_TEST: 1000 | ||
ROI_HEADS: | ||
USE_FPN: True | ||
ROI_BOX_HEAD: | ||
POOLER_RESOLUTION: 7 | ||
POOLER_SCALES: (0.25, 0.125, 0.0625, 0.03125) | ||
POOLER_SAMPLING_RATIO: 2 | ||
FEATURE_EXTRACTOR: "FPN2MLPFeatureExtractor" | ||
PREDICTOR: "FPNPredictor" | ||
ROI_MASK_HEAD: | ||
POOLER_SCALES: (0.25, 0.125, 0.0625, 0.03125) | ||
FEATURE_EXTRACTOR: "MaskRCNNFPNFeatureExtractor" | ||
PREDICTOR: "MaskRCNNC4Predictor" | ||
POOLER_RESOLUTION: 14 | ||
POOLER_SAMPLING_RATIO: 2 | ||
RESOLUTION: 28 | ||
SHARE_BOX_FEATURE_EXTRACTOR: False | ||
MASK_ON: True | ||
DATASETS: | ||
TRAIN: ("coco_2014_train", "coco_2014_valminusminival") | ||
TEST: ("coco_2014_minival",) | ||
DATALOADER: | ||
SIZE_DIVISIBILITY: 32 | ||
SOLVER: | ||
BASE_LR: 0.02 | ||
WEIGHT_DECAY: 0.0001 | ||
STEPS: (60000, 80000) | ||
MAX_ITER: 90000 | ||
TEST: | ||
BBOX_AUG: | ||
ENABLED: True | ||
H_FLIP: True | ||
SCALES: (400, 500, 600, 700, 900, 1000, 1100, 1200) | ||
MAX_SIZE: 2000 | ||
SCALE_H_FLIP: True |
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import torch | ||
import torchvision.transforms as TT | ||
|
||
from maskrcnn_benchmark.config import cfg | ||
from maskrcnn_benchmark.data import transforms as T | ||
from maskrcnn_benchmark.structures.image_list import to_image_list | ||
from maskrcnn_benchmark.structures.bounding_box import BoxList | ||
from maskrcnn_benchmark.modeling.roi_heads.box_head.inference import make_roi_box_post_processor | ||
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def im_detect_bbox_aug(model, images, device): | ||
# Collect detections computed under different transformations | ||
boxlists_ts = [] | ||
for _ in range(len(images)): | ||
boxlists_ts.append([]) | ||
|
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def add_preds_t(boxlists_t): | ||
for i, boxlist_t in enumerate(boxlists_t): | ||
if len(boxlists_ts[i]) == 0: | ||
# The first one is identity transform, no need to resize the boxlist | ||
boxlists_ts[i].append(boxlist_t) | ||
else: | ||
# Resize the boxlist as the first one | ||
boxlists_ts[i].append(boxlist_t.resize(boxlists_ts[i][0].size)) | ||
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# Compute detections for the original image (identity transform) | ||
boxlists_i = im_detect_bbox( | ||
model, images, cfg.INPUT.MIN_SIZE_TEST, cfg.INPUT.MAX_SIZE_TEST, device | ||
) | ||
add_preds_t(boxlists_i) | ||
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# Perform detection on the horizontally flipped image | ||
if cfg.TEST.BBOX_AUG.H_FLIP: | ||
boxlists_hf = im_detect_bbox_hflip( | ||
model, images, cfg.INPUT.MIN_SIZE_TEST, cfg.INPUT.MAX_SIZE_TEST, device | ||
) | ||
add_preds_t(boxlists_hf) | ||
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# Compute detections at different scales | ||
for scale in cfg.TEST.BBOX_AUG.SCALES: | ||
max_size = cfg.TEST.BBOX_AUG.MAX_SIZE | ||
boxlists_scl = im_detect_bbox_scale( | ||
model, images, scale, max_size, device | ||
) | ||
add_preds_t(boxlists_scl) | ||
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||
if cfg.TEST.BBOX_AUG.SCALE_H_FLIP: | ||
boxlists_scl_hf = im_detect_bbox_scale( | ||
model, images, scale, max_size, device, hflip=True | ||
) | ||
add_preds_t(boxlists_scl_hf) | ||
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# Merge boxlists detected by different bbox aug params | ||
boxlists = [] | ||
for i, boxlist_ts in enumerate(boxlists_ts): | ||
bbox = torch.cat([boxlist_t.bbox for boxlist_t in boxlist_ts]) | ||
scores = torch.cat([boxlist_t.get_field('scores') for boxlist_t in boxlist_ts]) | ||
boxlist = BoxList(bbox, boxlist_ts[0].size, boxlist_ts[0].mode) | ||
boxlist.add_field('scores', scores) | ||
boxlists.append(boxlist) | ||
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# Apply NMS and limit the final detections | ||
results = [] | ||
post_processor = make_roi_box_post_processor(cfg) | ||
for boxlist in boxlists: | ||
results.append(post_processor.filter_results(boxlist, cfg.MODEL.ROI_BOX_HEAD.NUM_CLASSES)) | ||
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return results | ||
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def im_detect_bbox(model, images, target_scale, target_max_size, device): | ||
""" | ||
Performs bbox detection on the original image. | ||
""" | ||
transform = TT.Compose([ | ||
T.Resize(target_scale, target_max_size), | ||
TT.ToTensor(), | ||
T.Normalize( | ||
mean=cfg.INPUT.PIXEL_MEAN, std=cfg.INPUT.PIXEL_STD, to_bgr255=cfg.INPUT.TO_BGR255 | ||
) | ||
]) | ||
images = [transform(image) for image in images] | ||
images = to_image_list(images, cfg.DATALOADER.SIZE_DIVISIBILITY) | ||
return model(images.to(device)) | ||
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def im_detect_bbox_hflip(model, images, target_scale, target_max_size, device): | ||
""" | ||
Performs bbox detection on the horizontally flipped image. | ||
Function signature is the same as for im_detect_bbox. | ||
""" | ||
transform = TT.Compose([ | ||
T.Resize(target_scale, target_max_size), | ||
TT.RandomHorizontalFlip(1.0), | ||
TT.ToTensor(), | ||
T.Normalize( | ||
mean=cfg.INPUT.PIXEL_MEAN, std=cfg.INPUT.PIXEL_STD, to_bgr255=cfg.INPUT.TO_BGR255 | ||
) | ||
]) | ||
images = [transform(image) for image in images] | ||
images = to_image_list(images, cfg.DATALOADER.SIZE_DIVISIBILITY) | ||
boxlists = model(images.to(device)) | ||
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# Invert the detections computed on the flipped image | ||
boxlists_inv = [boxlist.transpose(0) for boxlist in boxlists] | ||
return boxlists_inv | ||
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def im_detect_bbox_scale(model, images, target_scale, target_max_size, device, hflip=False): | ||
""" | ||
Computes bbox detections at the given scale. | ||
Returns predictions in the scaled image space. | ||
""" | ||
if hflip: | ||
boxlists_scl = im_detect_bbox_hflip(model, images, target_scale, target_max_size, device) | ||
else: | ||
boxlists_scl = im_detect_bbox(model, images, target_scale, target_max_size, device) | ||
return boxlists_scl |
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using the config globally in the library is something I've tried to avoid, but let's merge this as is and maybe modify this later on