问题描述：

	使用 pdf2image pdf文件转 image 时

异常：

\"Unable to get page count. Is poppler installed and in PATH?\"\npdf2image.exceptions.PDFInfoNotInstalledError: Unable to get page count. Is poppler installed and in PATH?"

linux：

	apt-get install poppler-utils

windows：

下载 poppler：
https://blog.alivate.com.au/poppler-windows/
方法一：
	要么设置环境变量  poppler/bin
方法二：
	参数指定绝对路径
                    images = convert_from_path(pdf_path=pdf_file_path, poppler_path=r'D:\poppler-0.68.0_x86\poppler-0.68.0\bin')