cache - size penalty with Pentax files

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bmezenga
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Joined: Fri Nov 09, 2007 1:44 am

cache - size penalty with Pentax files

Post by bmezenga »

I have been using the cache feature mainly with images without metadata/thumbnail. This changed this year when I got my first digital camera (Panasonic Lumix LZ5 6Mp). However, caching the photos from my actual camera (Pentax K100D 6Mp) made the cache grew more than what I would expected.

Playing with JPEGsnoop I tried some tests and got these strange cache size results.
("_orig": original file / "pict": 6Mp picture extracted by JPEGsnoop)

cache settings:
- one folder for each file,
- use embedded thumbnail (on and off),
- appearance 32x32,
- compression NONE,
- optimized

edit1: minor changes, new questions (see next post)
edit2/3: more changes, added link (image)
edit4: nonsense info removed
Last edited by bmezenga on Sat Dec 22, 2007 10:33 pm, edited 4 times in total.
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bmezenga
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Post by bmezenga »

So the cache size for the original LZ5 file is 10KB (Good) while the original K100D file shows 53KB (Bad).

Does the K100D result make a sense ?

Edit: nonsense info removed
Last edited by bmezenga on Sat Dec 22, 2007 10:39 pm, edited 1 time in total.
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bmezenga
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Post by bmezenga »

Pierre,
I just sended two K100D jpgs to webmaster at xnview dot com.

For all: I made new changes in the first post.
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xnview
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Post by xnview »

bmezenga wrote:Pierre,
I just sended two K100D jpgs to webmaster at xnview dot com.

For all: I made new changes in the first post.
I've sent you an email, could you send me a LZ5 sample?
Pierre.
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bmezenga
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Post by bmezenga »

xnview wrote:I've sent you an email, could you send me a LZ5 sample?
Done.
obelisk
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Post by obelisk »

This affects all PEF or JPG from Pentax from the *ist to K10D and K20D and is still present in 1.96
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