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Re: spatial quality

Subject: Re: spatial quality
From: Yan Calotychos <email@hidden>
Date: Tue, 24 Sep 2002 00:39:13 +0100

There is no "universal" way to tell this by looking at the JPEG data.
Some applications (such as Adobe Photoshop) use proprietary data (such as the Image Resource block) saved as Application data to store this type of info.

it would be interesting to know how quicktime saves this type of info?

Yan.

On Monday, September 23, 2002, at 11:23 pm, Rolf Howarth wrote:

Is there any way to get the original JPEG image compression quality for an arbitrary image opened by QuickTime? In the case of an image created by QuickTime the image description gives back the quality used during compression, but when opening other images it's always 512 (50%).

-Rolf
--
Rolf Howarth, Square Box Systems Ltd, Stratford-upon-Avon UK.

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References:
	>spatial quality (From: Rolf Howarth <email@hidden>)

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