Reducing the number of bytes...

I'm trying to reduce the number of bytes in an image. I can
easily
convert the bmp to jpg and the size to something reasonable,
but the
number of bytes is still large, around 300kb for a simple
image! Am I
missing something? Possibly a whole chunk of knowledge about
how
images work?

Cheers,

Cliff
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On 4/11/07, Cliff Pratt wrote:
> I'm trying to reduce the number of bytes in an image. I
can easily
> convert the bmp to jpg and the size to something
reasonable, but the
> number of bytes is still large, around 300kb for a
simple image! Am I
> missing something? Possibly a whole chunk of knowledge
about how
> images work?

Yeah, probably that's it 

But if you are saving to JPEG, try the "-quality"
option that will
save you lots of bytes at the expense of some visual
quality. Also,
strip any unwanted meta-data from file such as thumbnails,
EXIF,
comments, etc. The "-strip" option will remove it
all.

-- 
Bruno Schneider
http://www.dcc.ufla.br
/~bruno/
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Bruno Schneider scripsit:
> On 4/11/07, Cliff Pratt wrote:
>> I'm trying to reduce the number of bytes in an
image. I can easily
>> convert the bmp to jpg and the size to something
reasonable, but the
>> number of bytes is still large, around 300kb for a
simple image! Am I
>> missing something? Possibly a whole chunk of
knowledge about how
>> images work?
>
> Yeah, probably that's it 
>
> But if you are saving to JPEG, try the
"-quality" option that will
> save you lots of bytes at the expense of some visual
quality. Also,
> strip any unwanted meta-data from file such as
thumbnails, EXIF,
> comments, etc. The "-strip" option will
remove it all.
>
BMP doesn't hold any metadata so JPG converted from them
cannot contain
metadata. Conversion any format -> bmp -> any format
is recommended here
way of complete removal of metadata when -strip isn't enough
(and in
many cases it is not).

m.

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