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AlphaPose_to_OpenPose.py
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AlphaPose_to_OpenPose.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
########################################################
## Convert AlphaPose json file to OpenPose json files ##
########################################################
Converts AlphaPose single json file to OpenPose frame-by-frame files.
Usage:
python -m AlphaPose_to_OpenPose -i input_alphapose_json_file -o output_openpose_json_folder
OR python -m AlphaPose_to_OpenPose -i input_alphapose_json_file
OR from Pose2Sim.Utilities import AlphaPose_to_OpenPose; AlphaPose_to_OpenPose.AlphaPose_to_OpenPose_func(r'input_alphapose_json_file', r'output_openpose_json_folder')
'''
## INIT
import json
import os
import argparse
## AUTHORSHIP INFORMATION
__author__ = "David Pagnon"
__copyright__ = "Copyright 2023, Pose2Sim"
__credits__ = ["David Pagnon"]
__license__ = "BSD 3-Clause License"
__version__ = "0.9.4"
__maintainer__ = "David Pagnon"
__email__ = "contact@david-pagnon.com"
__status__ = "Development"
# FUNCTIONS
def AlphaPose_to_OpenPose_func(*args):
'''
Converts AlphaPose single json file to OpenPose frame-by-frame files.
Usage:
python -m AlphaPose_to_OpenPose -i input_alphapose_json_file -o output_openpose_json_folder
OR python -m AlphaPose_to_OpenPose -i input_alphapose_json_file
OR from Pose2Sim.Utilities import AlphaPose_to_OpenPose; AlphaPose_to_OpenPose.AlphaPose_to_OpenPose_func(r'input_alphapose_json_file', r'output_openpose_json_folder')
'''
try:
input_alphapose_json_file = os.path.realpath(args[0]['input_alphapose_json_file']) # invoked with argparse
if args[0]['output_openpose_json_folder'] == None:
output_openpose_json_folder = os.path.splitext(input_alphapose_json_file)[0]
else:
output_openpose_json_folder = os.path.realpath(args[0]['output_openpose_json_folder'])
except:
input_alphapose_json_file = os.path.realpath(args[0]) # invoked as a function
try:
output_openpose_json_folder = os.path.realpath(args[1])
except:
output_openpose_json_folder = os.path.splitext(input_alphapose_json_file)[0]
if not os.path.exists(output_openpose_json_folder):
os.mkdir(output_openpose_json_folder)
# Open AlphaPose json file
with open(input_alphapose_json_file, 'r') as alpha_json_f:
alpha_js = json.load(alpha_json_f)
json_dict = {'version':1.3, 'people':[]}
coords = []
frame_next = int(alpha_js[0].get('image_id').split('.')[0])
for i, a in enumerate(alpha_js):
frame_prev = int(a.get('image_id').split('.')[0])
coords = a.get('keypoints')
if frame_next != frame_prev or i==0:
# Save openpose json file with all people contained in the previous frame
if i != 0:
json_file = os.path.join(output_openpose_json_folder, os.path.splitext(os.path.basename(str(frame_prev-1).zfill(5)))[0]+'.json')
with open(json_file, 'w') as js_f:
js_f.write(json.dumps(json_dict))
# Reset json_dict
json_dict['people'] = [{'person_id':[-1],
'pose_keypoints_2d': [],
'face_keypoints_2d': [],
'hand_left_keypoints_2d':[],
'hand_right_keypoints_2d':[],
'pose_keypoints_3d':[],
'face_keypoints_3d':[],
'hand_left_keypoints_3d':[],
'hand_right_keypoints_3d':[]}]
else:
# Add new person to json_dict
json_dict['people'] += [{'person_id':[-1],
'pose_keypoints_2d': [],
'face_keypoints_2d': [],
'hand_left_keypoints_2d':[],
'hand_right_keypoints_2d':[],
'pose_keypoints_3d':[],
'face_keypoints_3d':[],
'hand_left_keypoints_3d':[],
'hand_right_keypoints_3d':[]}]
# Add coordinates to json_dict
json_dict['people'][-1]['pose_keypoints_2d'] = coords
frame_next = int(a.get('image_id').split('.')[0])
# Save last frame
json_file = os.path.join(output_openpose_json_folder, os.path.splitext(os.path.basename(str(frame_prev).zfill(5)))[0]+'.json')
with open(json_file, 'w') as js_f:
js_f.write(json.dumps(json_dict))
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-i', '--input_alphapose_json_file', required = True, help='input AlphaPose single json file')
parser.add_argument('-o', '--output_openpose_json_folder', required = False, help='output folder for frame-by-frame OpenPose json files')
args = vars(parser.parse_args())
AlphaPose_to_OpenPose_func(args)