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fix: linknet hyperparameters postprocessing + demo for rotation model #865

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merged 3 commits into from
Mar 22, 2022
Merged

fix: linknet hyperparameters postprocessing + demo for rotation model #865

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ddec3a8
fix: linknet parameters
charlesmindee Mar 16, 2022
5e10407
feat: add demo rotation
charlesmindee Mar 16, 2022
bbdcce3
feat: add rotation in demo
charlesmindee Mar 16, 2022
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fix: linknet parameters
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@charlesmindee
charlesmindee committed Mar 16, 2022
commit ddec3a80e76f826c888254f988b6fbab763d439a
7 changes: 3 additions & 4 deletions doctr/models/detection/linknet/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,7 @@ class LinkNetPostProcessor(DetectionPostProcessor):
"""
def __init__(
self,
bin_thresh: float = 0.5,
bin_thresh: float = 0.1,
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box_thresh: float = 0.1,
assume_straight_pages: bool = True,
) -> None:
Expand All @@ -39,7 +39,7 @@ def __init__(
bin_thresh,
assume_straight_pages
)
self.unclip_ratio = 1.5
self.unclip_ratio = 1.2

def polygon_to_box(
self,
Expand Down Expand Up @@ -103,13 +103,12 @@ def bitmap_to_boxes(
containing x, y, w, h, alpha, score for the box
"""
height, width = bitmap.shape[:2]
min_size_box = 1 + int(height / 512)
boxes = []
# get contours from connected components on the bitmap
contours, _ = cv2.findContours(bitmap.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
for contour in contours:
# Check whether smallest enclosing bounding box is not too small
if np.any(contour[:, 0].max(axis=0) - contour[:, 0].min(axis=0) < min_size_box):
if np.any(contour[:, 0].max(axis=0) - contour[:, 0].min(axis=0) < 2):
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continue
# Compute objectness
if self.assume_straight_pages:
Expand Down