fix duplicated ocr result

            blk = blkitem.blk

            blk._bounding_rect = blkitem.absBoundingRect()

            blk.vertical = blkitem.is_vertical

            blk.text = [self.st_manager.pairwidget_list[blkitem.idx].e_source.toPlainText()]

            blk.text = []

            blk.set_lines_by_xywh(blk._bounding_rect, angle=-blk.angle, x_range=[0, im_w-1], y_range=[0, im_h-1], adjust_bbox=True)

            blk_list.append(blk)