cache - size penalty with Pentax files

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bmezenga
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cache - size penalty with Pentax files

Post by bmezenga » Fri Nov 09, 2007 4:05 am

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 » Mon Nov 12, 2007 4:37 pm

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 » Sun Nov 18, 2007 1:03 pm

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 » Thu Nov 22, 2007 7:29 am

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 » Fri Nov 23, 2007 2:58 am

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

obelisk
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Post by obelisk » Sun Mar 01, 2009 6:51 am

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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