Dynamic Web TWAIN——网页扫描SDK 下载地址：【https://www.dynamsoft.com/Support/DWTGuide/Dynamic%20Web%20TWAIN%20SDK.html】 API：【http://developer.dynamsoft.com/dwt/api-reference】 开发者文档：【https://www.dynamsoft.com/download/Support/Dynamic%20Web%20TWAIN%20Developer's%20Guide.pdf】