68 lines
2.7 KiB
Python
68 lines
2.7 KiB
Python
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# detect the corner of chessboard
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from easymocap.annotator.file_utils import getFileList, read_json, save_json
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from tqdm import tqdm
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from easymocap.annotator import ImageFolder, findChessboardCorners
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import numpy as np
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from os.path import join
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import cv2
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import os
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def get_object(pattern, gridSize):
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object_points = np.zeros((pattern[1]*pattern[0], 3), np.float32)
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# 注意：这里为了让标定板z轴朝上，设定了短边是x，长边是y
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object_points[:,:2] = np.mgrid[0:pattern[0], 0:pattern[1]].T.reshape(-1,2)
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object_points[:, [0, 1]] = object_points[:, [1, 0]]
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object_points = object_points * gridSize
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return object_points
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def create_chessboard(path, pattern, gridSize):
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print('Create chessboard {}'.format(pattern))
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keypoints3d = get_object(pattern, gridSize=gridSize)
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keypoints2d = np.zeros((keypoints3d.shape[0], 3))
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imgnames = getFileList(path, ext='.jpg')
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template = {
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'keypoints3d': keypoints3d.tolist(),
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'keypoints2d': keypoints2d.tolist(),
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'visited': False
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}
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for imgname in tqdm(imgnames, desc='create template chessboard'):
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annname = imgname.replace('images', 'chessboard').replace('.jpg', '.json')
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annname = join(path, annname)
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if os.path.exists(annname):
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# 覆盖keypoints3d
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data = read_json(annname)
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data['keypoints3d'] = template['keypoints3d']
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save_json(annname, data)
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else:
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save_json(annname, template)
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def detect_chessboard(path, out, pattern, gridSize):
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create_chessboard(path, pattern, gridSize)
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dataset = ImageFolder(path, annot='chessboard')
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dataset.isTmp = False
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for i in tqdm(range(len(dataset))):
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imgname, annotname = dataset[i]
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# detect the 2d chessboard
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img = cv2.imread(imgname)
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annots = read_json(annotname)
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show = findChessboardCorners(img, annots, pattern)
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save_json(annotname, annots)
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if show is None:
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continue
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outname = join(out, imgname.replace(path + '/images/', ''))
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os.makedirs(os.path.dirname(outname), exist_ok=True)
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cv2.imwrite(outname, show)
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if __name__ == "__main__":
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import argparse
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parser = argparse.ArgumentParser()
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parser.add_argument('path', type=str)
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parser.add_argument('--out', type=str)
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parser.add_argument('--pattern', type=lambda x: (int(x.split(',')[0]), int(x.split(',')[1])),
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help='The pattern of the chessboard', default=(9, 6))
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parser.add_argument('--grid', type=float, default=0.1,
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help='The length of the grid size (unit: meter)')
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parser.add_argument('--debug', action='store_true')
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args = parser.parse_args()
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detect_chessboard(args.path, args.out, pattern=args.pattern, gridSize=args.grid)
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