[TAG] Image size vs. file size
joregan at gmail.com
Wed Sep 29 05:10:16 MSD 2010
On 29 September 2010 01:14, afsilva at gmail.com <afsilva at gmail.com> wrote:
>> So... what makes an image - seemingly of the same type, according to
>> what "identify" is reporting - that much bigger? Does anybody here know?
>> And is there any way to make the file sizes closer without losing a
>> significant amount of visual content?
> It has to do with the compression of the image. I am going to guess someone
> else will have a scientific explanation, so I am not even going to bother...
> There is an interesting graph on wikipedia here:
On top of that, most digital cameras add a thumbnail of about 1/20th
of the file size, lots of cameras duplicate information in EXIF, IPTC,
and XMP (which is uncompressed XML), etc., but the compression - and,
as it's a lossy compression, the homogenisation of similar areas - it
the main factor.
<Leftmost> jimregan, that's because deep inside you, you are evil.
<Leftmost> Also not-so-deep inside you.
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