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All, I was reading a document talk about a computer science framework(dcm4chee). https://dcm4che.atlassian.net/wiki/display/ee2/Compression+Service

But I have problem to understand some sentence of it. Please help to review it .

What I have trouble to understand is the first sentence of the document.

Compression Service. The Compression Service supports delayed, lossless compression of received images. This is an alternative to immediately compressing images when received.

I think it is because I didn't know the an alternative to meaning.

Does it mean the Compression Service only support delayed lossless compression of received images? I mean not support the immediately compressing images when received?

Thanks.

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The Compression Service schedules compression of incoming images, so there will be some delay between receipt of an image and the storage of the compressed version of that image. An alternative to means another way of doing things. In this case, the other way is immediately compressing each image as it arrives.

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  • so , Can I say that Compression service Only support delayed compression? Thanks.
    – Joe.wang
    Commented May 26, 2016 at 6:16
  • That's different from what the Compression Service documentation says. It's possible that the parameters to the Service could be set so that the system is forced to compress images upon receipt. I can't tell.
    – deadrat
    Commented May 26, 2016 at 6:50
  • Yes . Sure it is . It is like what you said. It is just a delayed service. Actually .There exist another service to provide immediately compression. Thank you.
    – Joe.wang
    Commented May 26, 2016 at 12:26

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