retriever.py
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class Retriever:
def __init__(self, target_fields):
self.keys_str = 'keys'
self.value_str = 'value'
self.signature_str = 'signature'
self.signature_have_str = '有'
self.signature_have_not_str = '无'
self.target_fields = target_fields
self.key_text_set = self.get_key_text_set(target_fields)
self.replace_map = {
'int': {
'(': '0'
}
}
def get_key_text_set(self, target_fields):
# 关键词集合
key_text_set = set()
for key_text_list in target_fields[self.keys_str].values():
for key_text, _, _ in key_text_list:
key_text_set.add(key_text)
return key_text_set
@staticmethod
def key_top1(coordinates_list, key_coordinates):
# 关键词查找方向：最上面
coordinates_list.sort(key=lambda x: x[1])
return coordinates_list[0]
@staticmethod
def key_right(coordinates_list, key_coordinates, top_padding, bottom_padding, scope):
# 关键词查找方向：右侧
if len(coordinates_list) == 1:
return coordinates_list[0]
height = key_coordinates[-1] - key_coordinates[1]
y_min = key_coordinates[1] - (top_padding * height)
y_max = key_coordinates[-1] + (bottom_padding * height)
width = key_coordinates[2] - key_coordinates[0]
x_min = key_coordinates[2]
x_max = key_coordinates[2] + (width * scope)
x_min_find = None
key_coordinates = None
for x0, y0, x1, y1 in coordinates_list:
cent_x = x0 + ((x1 - x0) / 2)
cent_y = y0 + ((y1 - y0) / 2)
if x_min < cent_x < x_max and y_min < cent_y < y_max:
if x_min_find is None or x0 < x_min_find:
x_min_find = x0
key_coordinates = (x0, y0, x1, y1)
return key_coordinates
def value_right(self, go_res, key_coordinates, top_padding, bottom_padding, scope, value_type=None):
# 字段值查找方向：右侧
height = key_coordinates[-1] - key_coordinates[1]
y_min = key_coordinates[1] - (top_padding * height)
y_max = key_coordinates[-1] + (bottom_padding * height)
width = key_coordinates[2] - key_coordinates[0]
x_min = key_coordinates[2]
x_max = key_coordinates[2] + (width * scope)
x_min_find = None
value = None
coordinates = None
for (x0, y0, _, _, x1, y1, _, _), text in go_res.values():
cent_x = x0 + ((x1 - x0) / 2)
cent_y = y0 + ((y1 - y0) / 2)
if x_min < cent_x < x_max and y_min < cent_y < y_max:
if x_min_find is None or x0 < x_min_find:
if len(text.strip()) > 0:
x_min_find = x0
value = text
coordinates = (x0, y0, x1, y1)
if isinstance(value_type, str) and value_type in self.replace_map and isinstance(value, str):
new_value = value.translate(str.maketrans(self.replace_map.get(value_type, {})))
return new_value, coordinates
return value, coordinates
@staticmethod
def value_under(go_res, key_coordinates, left_padding, right_padding, scope, value_type=None):
# 字段值查找方向：下方
width = key_coordinates[2] - key_coordinates[0]
x_min = key_coordinates[0] - (width * left_padding)
x_max = key_coordinates[2] + (width * right_padding)
height = key_coordinates[-1] - key_coordinates[1]
y_min = key_coordinates[-1]
y_max = key_coordinates[-1] + (height * scope)
y_min_find = None
value = None
coordinates = None
for (x0, y0, _, _, x1, y1, _, _), text in go_res.values():
cent_x = x0 + ((x1 - x0)/2)
cent_y = y0 + ((y1 - y0)/2)
if x_min < cent_x < x_max and y_min < cent_y < y_max:
if y_min_find is None or y0 < y_min_find:
if len(text.strip()) > 0:
y_min_find = y0
value = text
coordinates = (x0, y0, x1, y1)
return value, coordinates
@staticmethod
def rebuild_res(value_res, coordinates_res, is_signature=False):
words_result = dict()
for key, value in value_res.items():
if is_signature:
coordinates_dict = coordinates_res.get(key, dict())
x0 = coordinates_dict.get('xmin', -1)
y0 = coordinates_dict.get('ymin', -1)
x1 = coordinates_dict.get('xmax', -1)
y1 = coordinates_dict.get('ymax', -1)
else:
x0, y0, x1, y1 = coordinates_res.get(key, (-1, -1, -1, -1))
words_result[key] = {
'words': value,
'score': -1 if not is_signature and x0 == -1 else 1,
'location': {
'left': x0,
'top': y0,
'width': x1-x0,
'height': y1-y0,
}
}
return words_result
def get_target_fields(self, go_res, signature_res_list):
# 搜索关键词
key_text_info = dict()
for (x0, y0, _, _, x1, y1, _, _), text in go_res.values():
if text in self.key_text_set:
key_text_info.setdefault(text, list()).append((x0, y0, x1, y1))
# 搜索关键词
key_coordinates_info = dict()
for field, key_text_list in self.target_fields[self.keys_str].items():
pre_key_coordinates = None
for key_text, direction, kwargs in key_text_list:
if key_text not in key_text_info:
break
key_coordinates = getattr(self, 'key_{0}'.format(direction))(
key_text_info[key_text],
pre_key_coordinates,
**kwargs)
if not isinstance(key_coordinates, tuple):
break
pre_key_coordinates = key_coordinates
else:
key_coordinates_info[field] = pre_key_coordinates
# 搜索字段值
value_res = dict()
coordinates_res = dict()
for field, (direction, kwargs, default_value) in self.target_fields[self.value_str].items():
if not isinstance(key_coordinates_info.get(field), tuple):
value_res[field] = default_value
continue
value, coordinates = getattr(self, 'value_{0}'.format(direction))(
go_res,
key_coordinates_info[field],
**kwargs
)
if not isinstance(value, str):
value_res[field] = default_value
else:
value_res[field] = value
coordinates_res[field] = coordinates
# 搜索签章
tmp_signature_info = dict()
signature_coordinates_res = dict()
signature_value_res = dict()
for signature_dict in signature_res_list:
tmp_signature_info.setdefault(signature_dict['label'], list()).append(signature_dict['location'])
for field, signature_type_set in self.target_fields[self.signature_str].items():
for signature_type in signature_type_set:
if len(tmp_signature_info.get(signature_type, [])) > 0:
signature_value_res[field] = self.signature_have_str
signature_coordinates_res[field] = tmp_signature_info[signature_type].pop(0)
break
else:
signature_value_res[field] = self.signature_have_not_str
words_result = self.rebuild_res(value_res, coordinates_res)
words_result_signature = self.rebuild_res(signature_value_res, signature_coordinates_res, True)
words_result.update(words_result_signature)
# signature_value_res.update(value_res)
# return signature_value_res
return {'words_result': words_result}