PaddleX/paddlex/inference/models/table_structure_recognition/result.py

# Copyright (c) 2024 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import copy
from pathlib import Path

import numpy as np

from ....utils.deps import class_requires_deps, is_dep_available
from ...common.result import BaseCVResult, JsonMixin

if is_dep_available("opencv-contrib-python"):
    import cv2


@class_requires_deps("opencv-contrib-python")
class TableRecResult(BaseCVResult):
    """SaveTableResults"""

    def _get_input_fn(self):
        fn = super()._get_input_fn()
        if (page_idx := self["page_index"]) is not None:
            fp = Path(fn)
            stem, suffix = fp.stem, fp.suffix
            return f"{stem}_{page_idx}{suffix}"
        else:
            return fn

    def _to_img(self):
        image = self["input_img"]
        bbox_res = self["bbox"]
        if len(bbox_res) > 0 and len(bbox_res[0]) == 4:
            vis_img = self.draw_rectangle(image, bbox_res)
        else:
            vis_img = self.draw_bbox(image, bbox_res)
        return {"res": vis_img}

    def draw_rectangle(self, image, boxes):
        """draw_rectangle"""
        boxes = np.array(boxes)
        img_show = image.copy()
        for box in boxes.astype(int):
            x1, y1, x2, y2 = box
            cv2.rectangle(img_show, (x1, y1), (x2, y2), (255, 0, 0), 2)
        return img_show

    def draw_bbox(self, image, boxes):
        """draw_bbox"""
        for box in boxes:
            box = np.reshape(np.array(box), [-1, 1, 2]).astype(np.int64)
            image = cv2.polylines(np.array(image), [box], True, (255, 0, 0), 2)
        return image

    def _to_str(self, *args, **kwargs):
        data = copy.deepcopy(self)
        data.pop("input_img")
        return JsonMixin._to_str(data, *args, **kwargs)

    def _to_json(self, *args, **kwargs):
        data = copy.deepcopy(self)
        data.pop("input_img")
        return JsonMixin._to_json(data, *args, **kwargs)