python_gis实现批量tif转换jpg

# coding: utf-8
import arcpy
from arcpy import env
from arcpy import mapping
import os
path="D:/test"#读取tif目标路径
blank_mxd_path = "D:/test/blank.mxd"# 一个空的mxd文件
target_path="D:/test/out" #转换后的jpg路径
for file in os.listdir(path):
    if file[-3:]=="tif":#选择tif格式的图片
        print (file)
        # 导入mxd文件，也就是arcmap的保存文件
        mxd = arcpy.mapping.MapDocument(blank_mxd_path)
        df = arcpy.mapping.ListDataFrames(mxd)[0]#dataframe没具体意义
        tif_path = os.path.join(path,file)
        # 创建raster对象
        raster = arcpy.Raster(tif_path)
        arcpy.MakeRasterLayer_management(raster,'rasterLayer')
        layer = arcpy.mapping.Layer("rasterLayer")# make layer
        arcpy.mapping.AddLayer(df, layer, "AUTO_ARRANGE")# add layer
        # mxd.saveACopy("D:/test/test.mxd")
        # mxd=arcpy.mapping.MapDocument("D:/test/test.mxd")
        df = arcpy.mapping.ListDataFrames(mxd)[0]
        new_name=file[:-4]+"jpg"
        file_target=os.path.join(target_path, new_name)
        # 导出图片命令
        arcpy.mapping.ExportToJPEG(mxd, file_target, df, df_export_width=1024, df_export_height=1024, resolution=300)
        del mxd, df