I've always used Sysprep/image X to capture a Windows 7 iamge: https://technet.microsoft.com/en-us/windows/preparing-an-image-using-sysprep-and-imagex.aspx
However my new job uses SCCM Task sequence to capture the image and has never heard of using sysprep & imagex.
Before I try to justify sysprep & imagex way, is there something I'm missing ? Why use SCCM to capture a image? Is this just another option?