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from typing import List, Tuple
import numpy as np
from .imgproc_utils import rotate_image
from .textblock import TextBlock, TextAlignment
class Line:
def __init__(self, text: str = '', pos_x: int = 0, pos_y: int = 0, length: float = 0, spacing: int = 0) -> None:
self.text = text
self.pos_x = pos_x
self.pos_y = pos_y
self.length = int(length)
self.num_words = 0
if text:
self.num_words += 1
self.spacing = 0
self.add_spacing(spacing)
def append_right(self, word: str, w_len: int, delimiter: str = ''):
self.text = self.text + delimiter + word
if word:
self.num_words += 1
self.length += w_len
def append_left(self, word: str, w_len: int, delimiter: str = ''):
self.text = word + delimiter + self.text
if word:
self.num_words += 1
self.length += w_len
def add_spacing(self, spacing: int):
self.spacing = spacing
self.pos_x -= spacing
self.length += 2 * spacing
def strip_spacing(self):
self.length -= self.spacing * 2
self.pos_x += self.spacing
self.spacing = 0
def line_is_valid(line: Line, new_len: int, delimiter_len, max_width, words_length, srcline_wlist, line_no: int, line_height, ref_src_lines: bool = False):
if ref_src_lines:
# if line_no >= 0 and line_no < len(srcline_wlist):
# _max_width = min(srcline_wlist[line_no], max_width)
# else:
# _max_width = max_width
if line_no >= 0 and line_no < len(srcline_wlist):
_max_width = srcline_wlist[line_no] * words_length
else:
_max_width = np.inf
_max_width = max(srcline_wlist) * words_length
_max_width = _max_width + delimiter_len * line.num_words
max_width = min(max_width, _max_width)
if new_len < max_width:
return True
else:
if line.length / max_width < max_width / new_len:
return True
else:
return False
def layout_lines_aligncenter(
blk: TextBlock,
mask: np.ndarray,
words: List[str],
centroid: List[int],
wl_list: List[int],
delimiter_len: int,
line_height: int,
spacing: int = 0,
delimiter: str = ' ',
max_central_width: float = np.inf,
word_break: bool = False,
ref_src_lines = False,
srcline_wlist=None,
start_from_top=False
)->List[Line]:
lh_pad = 0
if blk.line_spacing > 1:
lh_pad = int(np.ceil(line_height - line_height / blk.line_spacing))
centroid_x, centroid_y = centroid
adjust_x = adjust_y = 0
border_thr = 220
# layout the central line, the center word is approximately aligned with the centroid of the mask
num_words = len(words)
len_left, len_right = [], []
wlst_left, wlst_right = [], []
sum_left, sum_right = 0, 0
words_length = sum(wl_list)
if num_words > 1:
wl_array = np.array(wl_list, dtype=np.float64)
wl_cumsums = np.cumsum(wl_array)
wl_cumsums = wl_cumsums - wl_cumsums[-1] / 2 - wl_array / 2
central_index = np.argmin(np.abs(wl_cumsums))
if central_index > 0:
wlst_left = words[:central_index]
len_left = wl_list[:central_index]
sum_left = np.sum(len_left)
if central_index < num_words - 1:
wlst_right = words[central_index + 1:]
len_right = wl_list[central_index + 1:]
sum_right = np.sum(len_right)
else:
central_index = 0
pos_y = centroid_y - line_height // 2
pos_x = centroid_x - wl_list[central_index] // 2
bh, bw = mask.shape[:2]
central_line = Line(words[central_index], pos_x, pos_y, wl_list[central_index], spacing)
line_bottom = pos_y + line_height
while (sum_left > 0 or sum_right > 0) and not start_from_top:
left_valid, right_valid = False, False
if sum_left > 0:
new_len_l = central_line.length + len_left[-1] + delimiter_len
new_x_l = centroid_x - new_len_l // 2
new_r_l = new_x_l + new_len_l
if (new_x_l > 0 and new_r_l < bw):
if mask[pos_y: line_bottom - lh_pad, new_x_l].mean() > border_thr and \
mask[pos_y: line_bottom - lh_pad, new_r_l].mean() > border_thr:
left_valid = True
if sum_right > 0:
new_len_r = central_line.length + len_right[0] + delimiter_len
new_x_r = centroid_x - new_len_r // 2 - line_height // 2
new_r_r = centroid_x + new_len_r // 2 + line_height // 2
if (new_x_r > 0 and new_r_r < bw):
if mask[pos_y: line_bottom - lh_pad, new_x_r].mean() > border_thr and \
mask[pos_y: line_bottom - lh_pad, new_r_r].mean() > border_thr:
right_valid = True
insert_left = False
if left_valid and right_valid:
if sum_left > sum_right:
insert_left = True
elif left_valid:
insert_left = True
elif not right_valid:
break
if insert_left:
new_len = central_line.length + len_left[-1] + delimiter_len
else:
new_len = central_line.length + len_right[0] + delimiter_len
line_valid = line_is_valid(central_line, new_len, delimiter_len, max_central_width, words_length, srcline_wlist, -1, line_height, ref_src_lines)
if ref_src_lines and not line_valid and len(srcline_wlist) == 1:
if new_len < max_central_width:
line_valid = True
if not line_valid:
break
if insert_left:
central_line.append_left(wlst_left.pop(-1), len_left[-1] + delimiter_len, delimiter)
sum_left -= len_left.pop(-1)
central_line.pos_x = new_x_l
else:
central_line.append_right(wlst_right.pop(0), len_right[0] + delimiter_len, delimiter)
sum_right -= len_right.pop(0)
central_line.pos_x = new_x_r
line_right_no = line_left_no = 0
if ref_src_lines:
nl = len(srcline_wlist)
if nl % 2 == 0:
line_right_no = nl // 2
line_left_no = nl // 2 - 1
else:
line_right_no = nl // 2 + 1
line_left_no = nl // 2 - 1
if not start_from_top:
central_line.strip_spacing()
lines = [central_line]
else:
lines = []
sum_right = sum(wl_list)
sum_left = 0
wlst_right = words
len_right = wl_list
line_right_no = 0
# layout bottom half
if sum_right > 0:
w, wl = wlst_right.pop(0), len_right.pop(0)
pos_x = centroid_x - wl // 2
if start_from_top:
pos_y = centroid_y - int(blk.bounding_rect()[3] / 2)
else:
pos_y = centroid_y + line_height // 2
pos_y = max(0, min(pos_y, mask.shape[0] - 1))
top_mean = mask[pos_y, :].mean()
x_mean = mask.mean(axis=1)
base_mean = x_mean.max() / 2
if top_mean < base_mean:
available_y = np.where(
x_mean[pos_y:] > base_mean
)[0]
if len(available_y) > 0:
adjust_y = min(available_y[0], line_height)
pos_y = pos_y + adjust_y
line_bottom = pos_y + line_height
line = Line(w, pos_x, pos_y, wl, spacing)
lines.append(line)
sum_right -= wl
while sum_right > 0:
w, wl = wlst_right.pop(0), len_right.pop(0)
sum_right -= wl
new_len = line.length + wl + delimiter_len
new_x = centroid_x - new_len // 2 - line_height // 2
right_x = new_x + new_len + line_height // 2
if new_x < 0 or right_x >= bw:
line_valid = False
elif mask[pos_y: line_bottom - lh_pad, new_x].mean() < border_thr or\
mask[pos_y: line_bottom - lh_pad, right_x].mean() < border_thr:
line_valid = False
if ref_src_lines and (len(wl_list) == 1 or line_right_no + 1 >= len(srcline_wlist)) and \
line_is_valid(line, new_len, delimiter_len, max_central_width, words_length, srcline_wlist, line_right_no, line_height, ref_src_lines):
line_valid = True
else:
line_valid = True
if line_valid:
line.append_right(w, wl+delimiter_len, delimiter)
line.pos_x = new_x
line_valid = line_is_valid(line, new_len, delimiter_len, max_central_width, words_length, srcline_wlist, line_right_no, line_height, ref_src_lines)
if not line_valid:
if sum_right > 0:
w, wl = wlst_right.pop(0), len_right.pop(0)
sum_right -= wl
else:
line.strip_spacing()
break
if not line_valid:
pos_x = centroid_x - wl // 2
pos_y = line_bottom
line_bottom += line_height
line.strip_spacing()
line = Line(w, pos_x, pos_y, wl, spacing)
lines.append(line)
line_right_no += 1
# layout top half
if sum_left > 0:
w, wl = wlst_left.pop(-1), len_left.pop(-1)
pos_x = centroid_x - wl // 2
pos_y = centroid_y - line_height // 2 - line_height
pos_y = max(0, min(pos_y, mask.shape[0] - 1))
line_bottom = pos_y + line_height
line = Line(w, pos_x, pos_y, wl, spacing)
lines.insert(0, line)
sum_left -= wl
while sum_left > 0:
w, wl = wlst_left.pop(-1), len_left.pop(-1)
sum_left -= wl
new_len = line.length + wl + delimiter_len
new_x = centroid_x - new_len // 2 - line_height // 2
right_x = new_x + new_len + line_height // 2
if new_x <= 0 or right_x >= bw:
line_valid = False
elif mask[pos_y: line_bottom - lh_pad, new_x].mean() < border_thr or\
mask[pos_y: line_bottom - lh_pad, right_x].mean() < border_thr:
line_valid = False
if ref_src_lines and line_left_no - 1 < 0 and \
line_is_valid(line, new_len, delimiter_len, max_central_width, words_length, srcline_wlist, line_left_no, line_height, ref_src_lines):
line_valid = True
else:
line_valid = True
if line_valid:
line.append_left(w, wl+delimiter_len, delimiter)
line.pos_x = new_x
line_valid = line_is_valid(line, new_len, delimiter_len, max_central_width, words_length, srcline_wlist, line_left_no, line_height, ref_src_lines)
if not line_valid:
if sum_left > 0:
w, wl = wlst_left.pop(-1), len_left.pop(-1)
sum_left -= wl
else:
line.strip_spacing()
break
if not line_valid :
pos_x = centroid_x - wl // 2
pos_y -= line_height
line_bottom = pos_y + line_height
line.strip_spacing()
line = Line(w, pos_x, pos_y, wl, spacing)
lines.insert(0, line)
line_left_no -= 1
return lines, (adjust_x, adjust_y)
def layout_lines_alignside(
blk: TextBlock,
mask: np.ndarray,
words: List[str],
origin: List[int],
wl_list: List[int],
delimiter_len: int,
line_height: int,
spacing: int = 0,
delimiter: str = ' ',
word_break: bool = False,
max_width: int = np.inf,
ref_src_lines = False,
srcline_wlist=None,
)->List[Line]:
align_right = blk.fontformat.alignment == TextAlignment.Right
ox, oy = origin
bh, bw = mask.shape[:2]
num_words = len(words)
blk_rect = blk.bounding_rect()
blk_width = blk_rect[2]
lines = []
words_length = sum(wl_list)
lh_pad = 0
if blk.line_spacing > 1:
lh_pad = int(np.ceil(line_height - line_height / blk.line_spacing))
if num_words > 0:
sum_right = np.array(wl_list).sum()
w, wl = words.pop(0), wl_list.pop(0)
line = Line(w, ox, oy, wl)
lines.append(line)
sum_right -= wl
line_bottom = oy + line_height
pos_y = oy
line_id = 0
while sum_right > 0:
w, wl = words.pop(0), wl_list.pop(0)
sum_right -= wl
new_len = line.length + wl + delimiter_len
if align_right:
new_x = ox + blk_width - new_len - line_height // 2
else:
new_x = ox + new_len + line_height // 2
line_valid = False
if new_x < bw and new_x > 0:
if mask[np.clip(pos_y, 0, bh - 1): np.clip(line_bottom - lh_pad, 0, bh), new_x].mean() > 240:
line_valid = True
else:
if ref_src_lines and line_id + 1 >= len(srcline_wlist) and line_is_valid(line, new_len, delimiter_len, max_width, words_length, srcline_wlist, line_id, line_height, ref_src_lines):
line_valid = True
if line_valid:
line_valid = line_is_valid(line, new_len, delimiter_len, max_width, words_length, srcline_wlist, line_id, line_height, ref_src_lines)
if line_valid:
line.append_right(w, wl+delimiter_len, delimiter)
else:
pos_y = line_bottom
line_bottom += line_height
line = Line(w, ox, pos_y, wl)
line_id += 1
lines.append(line)
return lines, (0, 0)
def layout_text(
blk: TextBlock,
mask: np.ndarray,
mask_xyxy: List,
centroid: List,
words: List[str],
wl_list: List[int],
delimiter: str,
delimiter_len: int,
line_height: int,
spacing: int = 0,
max_central_width=np.inf,
src_is_cjk=False,
tgt_is_cjk=False,
ref_src_lines = False
) -> Tuple[str, List]:
angle = blk.angle
alignment = blk.alignment
start_from_top = False
srcline_wlist = None
if ref_src_lines:
srcline_wlist, srcline_width = blk.normalizd_width_list(normalize=False)
# tgtline_width = sum(wl_list) + delimiter_len * max(len(wl_list) - 1, 0)
# if tgtline_width < srcline_width:
# min_bbox = blk.min_rect(rotate_back=True)[0]
# x1, y1 = min_bbox[0]
# x2, y2 = min_bbox[2]
# w = x2 - x1
# max_central_width = min(max_central_width, w)
# pass
if alignment == TextAlignment.Center and \
len(srcline_wlist) > 1:
if len(srcline_wlist) == 2:
start_from_top = True
else:
nw = len(srcline_wlist)
# nl = min(nw // 2, 2)
nl = 1
sum_top = sum(srcline_wlist[:nl])
sum_btn = sum(srcline_wlist[-nl:])
start_from_top = sum_top / sum_btn > 1.2 and srcline_wlist[0] / max(srcline_wlist) > 0.9
srcline_wlist = np.array(srcline_wlist) / srcline_width
srcline_wlist = srcline_wlist.tolist()
# line_height = min((blk.detected_font_size), line_height)
# if ref_src_lines:
# mask = np.ones_like(mask) * 255
if max_central_width == np.inf:
max_central_width = mask.shape[1]
centroid_x, centroid_y = centroid
center_x = mask_xyxy[0] + centroid_x
center_y = mask_xyxy[1] + centroid_y
shifted_x, shifted_y = 0, 0
if abs(angle) > 0:
old_h, old_w = mask.shape[:2]
old_origin = (old_w // 2, old_h // 2)
rel_cx, rel_cy = centroid[0] - old_origin[0], centroid[1] - old_origin[1]
mask = rotate_image(mask, angle)
rad = np.deg2rad(angle)
r_sin, r_cos = np.sin(rad), np.cos(rad)
new_rel_cy = -rel_cx * r_sin + rel_cy * r_cos
new_rel_cx = rel_cy * r_sin + rel_cx * r_cos
shifted_x, shifted_y = new_rel_cx - rel_cx, new_rel_cy - rel_cy
new_h, new_w = mask.shape[:2]
new_origin = (new_w // 2, new_h // 2)
new_cx, new_cy = new_origin[0] + new_rel_cx, new_origin[1] + new_rel_cy
centroid = [int(new_cx), int(new_cy)]
if alignment == TextAlignment.Center:
lines, adjust_xy = layout_lines_aligncenter(blk, mask, words, centroid, wl_list, delimiter_len, line_height, spacing, delimiter,
max_central_width, ref_src_lines=ref_src_lines, srcline_wlist=srcline_wlist,
start_from_top=start_from_top)
else:
lines, adjust_xy = layout_lines_alignside(blk, mask, words, centroid, wl_list, delimiter_len, line_height, spacing, delimiter, False, max_central_width,
ref_src_lines=ref_src_lines, srcline_wlist=srcline_wlist)
concated_text = []
pos_x_lst, pos_right_lst = [], []
for line in lines:
pos_x_lst.append(line.pos_x)
pos_right_lst.append(max(line.pos_x, 0) + line.length)
concated_text.append(line.text)
concated_text = '\n'.join(concated_text)
pos_x_lst = np.array(pos_x_lst)
pos_right_lst = np.array(pos_right_lst)
canvas_l, canvas_r = pos_x_lst.min(), pos_right_lst.max()
canvas_t, canvas_b = lines[0].pos_y, lines[-1].pos_y + line_height
canvas_h = int(canvas_b - canvas_t)
canvas_w = int(canvas_r - canvas_l)
if alignment == 1:
abs_x = int(round(center_x - canvas_w / 2))
abs_y = int(round(center_y - canvas_h / 2))
else:
abs_x = shifted_x
abs_y = shifted_y
return concated_text, [abs_x, abs_y, canvas_w, canvas_h], start_from_top, adjust_xy |