简介：在做标注的时候常常会分不同时间不同批次来标注数据，最后合并的时候，有的json标签文件和image文件相对路径不同，则直接把所有图片和标签复制在一起，用labelme打开会出错。

注：最终的文件图片名和json标签名一致，json文件的"imagePath"也与图片一致(json文件和image的相对路径关系可改--prePath)

合并数据集

import json
import os
import cv2 as cv
import shutil

def fromJsonGetImagePath(jsonPath):
    """
      return imageName
    """
    data = []
    with open(jsonPath, "r", encoding='utf-8') as f:
        jsonData = json.load(f)
        
        img_name = jsonData["imagePath"]
        img_name = img_name.rsplit("\\",1)[-1]
        
    return img_name
                
def changeJsonImagePath(jsonPath,imagePath):
    """
      return imageName
    """
    
    with open(jsonPath, "r", encoding='utf-8') as f:
        jsonData = json.load(f)
        
    jsonData["imagePath"] = imagePath
    with open(jsonPath,"w",encoding="utf-8") as fo:
        json.dump(jsonData,fo)

def getAllJsonFilePath(jsonFolder):
    jsonPathList = []
    for item in os.listdir(jsonFolder):
        if item.rsplit(".",1)[-1] != "json":
            continue
        jsonPathList.append(os.path.join(jsonFolder,item))
    return jsonPathList

不同批次的数据集合并

• 找不同的文件夹中的所有json文件
• 从json文件中找出图片名，获取对应的图片
• 按一定命名规则复制到另一个文件夹

if __name__ == "__main__":
    rootPath = r"K:\imageData\SMTdataset\SMTData"
    imageFolder1 = rootPath + "\\image"#原始图片
    labelFolder1 = rootPath + "\\label6"#标准标注文件的存放路径，标准文件以json格式存储
    imageFolder2 = rootPath + "\\image2"#原始图片
    labelFolder2 = rootPath + "\\image2"#标准标注文件的存放路径，标准文件以json格式存储
    
    tempFolder = rootPath + "\\temp"
    dstImageFolder = tempFolder + "\\image"
    dstLabelFolder = tempFolder + "\\label"
    
    #修改json文件名，和位置后，需要把json里面的imagePath也做对应的修改
    prePath = "..\\\\image\\\\"#四条\会转为两条,\表示转义
    
    ZFILLN = 8#零填充数
    
    if not os.path.exists(dstImageFolder):
        try:
            os.makedirs(dstImageFolder)
        except:
            print("create {} failed!".format(dstImageFolder))
    if not os.path.exists(dstLabelFolder):
        try:
            os.makedirs(dstLabelFolder)
        except:
            print("create {} failed!".format(dstLabelFolder))
            
    labelPathLists1 = getAllJsonFilePath(labelFolder1)    
    labelPathLists2 = getAllJsonFilePath(labelFolder2)
    
    imagePathLists1 = [os.path.join(imageFolder1,fromJsonGetImagePath(labelPathLists1[i])) for i in range(len(labelPathLists1))]    
    imagePathLists2 = [os.path.join(imageFolder2,fromJsonGetImagePath(labelPathLists2[i])) for i in range(len(labelPathLists2))]
    
    for i in range(len(labelPathLists1)):
        dstLabelPath = os.path.join(dstLabelFolder,str(i).zfill(ZFILLN)+"."+labelPathLists1[i].rsplit(".",1)[-1])        
        dstImagePath = os.path.join(dstImageFolder,str(i).zfill(ZFILLN)+"."+imagePathLists1[i].rsplit(".",1)[-1])
        
        print("srcLabel: {} ----> dstLabel:{}".format(labelPathLists1[i],dstLabelPath))
        print("srcImage: {} ----> dstImage:{}".format(imagePathLists1[i],dstImagePath))
        shutil.copy(labelPathLists1[i],dstLabelPath)        
        shutil.copy(imagePathLists1[i],dstImagePath)
        dstImageName = dstImagePath.rsplit("\\",1)[-1]
        changeJsonImagePath(dstLabelPath,prePath + dstImageName)
        
    for j in range(len(labelPathLists2)):
        dstLabelPath = os.path.join(dstLabelFolder,str(i+j+1).zfill(ZFILLN)+"."+labelPathLists2[j].rsplit(".",1)[-1])        
        dstImagePath = os.path.join(dstImageFolder,str(i+j+1).zfill(ZFILLN)+"."+imagePathLists2[j].rsplit(".",1)[-1])
        
        print("srcLabel: {} ----> dstLabel:{}".format(labelPathLists2[j],dstLabelPath))
        print("srcImage: {} ----> dstImage:{}".format(imagePathLists2[j],dstImagePath))
        shutil.copy(labelPathLists2[j],dstLabelPath)        
        shutil.copy(imagePathLists2[j],dstImagePath)
        dstImageName = dstImagePath.rsplit("\\",1)[-1]
        changeJsonImagePath(dstLabelPath,prePath + dstImageName)
        
    
    
    

output:

    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000003.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000000.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000003.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000000.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000004.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000001.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000004.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000001.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000006.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000002.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000006.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000002.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000007.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000003.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000007.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000003.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000008.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000004.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000008.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000004.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000009.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000005.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000009.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000005.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000015.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000006.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000015.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000006.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000016.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000007.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000016.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000007.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000017.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000008.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000017.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000008.bmp
    srcLabel: K:\imageData\SMTdataset\SMTData\label6\00000018.json ----> dstLabel:K:\imageData\SMTdataset\SMTData\temp\label\00000009.json
    srcImage: K:\imageData\SMTdataset\SMTData\image\00000018.bmp ----> dstImage:K:\imageData\SMTdataset\SMTData\temp\image\00000009.bmp