paddlers/examples/rs_research/predict_cd.py

#!/usr/bin/env python

import argparse
import os
import os.path as osp

import cv2
import paddle
import paddlers
from tqdm import tqdm

import custom_model
import custom_trainer


def read_file_list(file_list, sep=' '):
    with open(file_list, 'r') as f:
        for line in f:
            line = line.strip()
            parts = line.split(sep)
            yield parts


def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--model_dir", default=None, type=str, help="Path of saved model.")
    parser.add_argument("--data_dir", type=str, help="Path of input dataset.")
    parser.add_argument("--file_list", type=str, help="Path of file list.")
    parser.add_argument(
        "--save_dir",
        default='./exp/predict',
        type=str,
        help="Path of directory to save prediction results.")
    parser.add_argument(
        "--ext",
        default='.png',
        type=str,
        help="Extension name of the saved image file.")
    return parser.parse_args()


if __name__ == '__main__':
    args = parse_args()

    model = paddlers.tasks.load_model(args.model_dir)

    if not osp.exists(args.save_dir):
        os.makedirs(args.save_dir)

    with paddle.no_grad():
        for parts in tqdm(read_file_list(args.file_list)):
            im1_path = osp.join(args.data_dir, parts[0])
            im2_path = osp.join(args.data_dir, parts[1])

            pred = model.predict((im1_path, im2_path))
            cm = pred['label_map']
            # {0,1} -> {0,255}
            cm[cm > 0] = 255
            cm = cm.astype('uint8')

            if len(parts) > 2:
                name = osp.basename(parts[2])
            else:
                name = osp.basename(im1_path)
            name = osp.splitext(name)[0] + args.ext
            out_path = osp.join(args.save_dir, name)
            cv2.imwrite(out_path, cm)