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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
In-reply-to: <alpine.GSO.2.01.1412201823330.18732@freddy.simplesystems.org>
References: <201412151849.41073.even.rouault@spatialys.com>
	<alpine.GSO.2.01.1412201642240.18732@freddy.simplesystems.org>
	<201412210006.13468.even.rouault@spatialys.com>
	<alpine.GSO.2.01.1412201823330.18732@freddy.simplesystems.org>
Comments: In-reply-to Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
	message dated "Sat, 20 Dec 2014 18:30:40 -0600"
Date: Sat, 20 Dec 2014 21:24:16 -0500
Message-ID: <14803.1419128656@sss.pgh.pa.us>
Cc: TIFF <tiff@lists.maptools.org>
Subject: Re: [Tiff] Unnecessary bigger JPEG-compressed TIFF
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Bob Friesenhahn <bfriesen@simple.dallas.tx.us> writes:
> On Sun, 21 Dec 2014, Even Rouault wrote:
>> And from my testing with old imagemagick it seems that gm convert
>> doesn't produce a YCbCr JPEG-compressed TIFF.

> Hmmm ...
> Does YCbCr make that big of a difference?

Possibly.  What were you doing instead?  RGB output would be substantially
larger than YCbCr, possibly approaching 3x larger.  (That still isn't
enough to explain the reported size difference though.)

			regards, tom lane
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