41、labelme数据集转dota、rolabelimg以及rolabelimg转dota、labelme和labelimg数据集旋转水平镜像 垂直镜像 和水平垂直镜像_dota转labelme

基本思想：为了给BBAVectors-Oriented-Object-Detection 提供数据，所以记录一下操作，搞了旋转，但是旋转影响图片大小，所以先写个镜像方法，进行训练和使扩充数据集

一、labelme转dota数据集 ，并做了顺时针排序处理 

import json
import os
from glob import glob
import argparse
import numpy as np
import shutil
from PIL import Image
 
 
# convert labelme json to DOTA txt format
# convert DOTA json to lableme txt format
def custombasename(fullname):
    return os.path.basename(os.path.splitext(fullname)[0])
 
 
def order_points_new(pts): # clock -https://zhuanlan.zhihu.com/p/10643062
    # sort the points based on their x-coordinates
    xSorted = pts[np.argsort(pts[:, 0]), :]
 
    # grab the left-most and right-most points from the sorted
    # x-roodinate points
    leftMost = xSorted[:2, :]
    rightMost = xSorted[2:, :]
    if leftMost[0,1]!=leftMost[1,1]:
        leftMost=leftMost[np.argsort(leftMost[:,1]),:]
    else:
        leftMost=leftMost[np.argsort(leftMost[:,0])[::-1],: