Re: Zip files trouble/Problem solved

On Sat, 20 Aug 2005 21:54:44 GMT, Splodge commented


>
>>> A friend of mine has today emailed me a folder of 33 photies. The
>>> "attach" line of her email says the folder is a zipped file (JustZipIt)
>>> and it contains 33 photies Dimension 1800 x 1200, Type JPEG image and
>>> each one ranges from 133 KB to 174 KB. It took me seconds to load, and I
>>> can click on each one instantly and enlarge it. I tried doing that after
>>> I downloaded JustZipIt, but my poota just ground to a halt. I've been
>>> trying to get hold of her to ask how she did it, but can't.
>>
>> It's likely that the photos were well-compressed jpegs in the first place,
>> and JustZipIt did very little compression, just joining the 33 files into
>> one
>> for eay of handling. Is the zip file attachment about 3MB in size?
>>
>> --
>> Ali
>
> Yes Ali, it's 3.65 MB

Right, there's virtually no extra compression in the zip file.
You should be able to see the percentage compression (and /or before and
after sizes) by just opning the file in JustZipIt - you can in WinZip.

So the jpegs were reduced in size *before* zipping them; probably by the
methods shewn unto you by Honourable Lady Boo.

Remember, a modern digital camera collect *far* too much detail for most
purposes, you need to loose the detail that can't be seen (which is generally
what the jpeg format does, depending on setings.



--
Ali
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