使用JPEG图像压缩，把服务器端的摄像头采集的BMP图像，压缩成JPEG图像，并通过网络传输到客户端。客户端通过浏览器查看摄像头采集到的图片。-use JPEG image compression, server-camera acquisition of BMP images, JPEG Image compression and network transmission to the client. The client browser View camera collection to t