Archived posting to the Leica Users Group, 2006/08/25

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Subject: [Leica] LUG contest: image formats
From: jbm at jbm.org (Jeff Moore)
Date: Fri Aug 25 15:54:47 2006
References: <20060825222631.GR5806@jbm.org> <F334BED2E24908BA8E327709@scarborough.isc.org>
 
2006-08-25-18:38:00 Brian Reid:
> Yes, there are a few people 
> on the LUG who are both capable of and willing to do the steps needed to 
> look at the EXIF data of an online image, but I was hoping that most 
> wouldn't.

Ah, fair enough.  I guess I'm too used to thinking in worst cases.

> Although I haven't tested it, I believe from reading the code that if
> you make your own JPEG and arrange for it to be the right size, that
> it will use yours without further processing. If it fits inside a
> 640x640 box, then it won't get adjusted when you upload it, I believe.

Thanks -- the sort of clue I was looking for.

So, I'm now assuming one's target should be:

 - largest size such that width <= 640 and height <= 640

 - tagged as 72dpi, consistent with the common convention?

 - sRGB colorspace, tagged as such?

 - highest-quality JPEG compression such that file size <= 5MB

About right?
Replies: Reply from reid at mejac.palo-alto.ca.us (Brian Reid) ([Leica] LUG contest: image formats)
 In reply to: Message from jbm at jbm.org (Jeff Moore) ([Leica] LUG contest: image formats)
Message from reid at mejac.palo-alto.ca.us (Brian Reid) ([Leica] LUG contest: image formats)