DCT Float in JPEG, Who use this?

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RGBA
Posts: 45
Joined: Fri Jul 18, 2008 10:41 am

DCT Float in JPEG, Who use this?

Post by RGBA »

I just wanted to ask you, did you ever used the floating-point DCT method?
The following differences are just compared between DCT float and DCT int (slow) method.

Pro:
- more accurate (depend on CPU)
- the difference should be not visible
- lower size
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xnview
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Re: DCT Float in JPEG, Who use this?

Post by xnview »

RGBA wrote: The following differences are just compared between DCT float and DCT int (slow) method.
You means DCT float (slow) :-)
Pierre.
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RGBA
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Post by RGBA »

There is only one float mode, so why should I add slow? :?

If you relate to the Streaming SIMD Extensions (SSE),
the common Applications (for example XnView) support just the one.