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2853
Number: 2852
From: James Gibat-Thoroski <mercurycapri@c...>
Date: Sun Jun 1, 2003 12:07 am
Subject: Re: [ASC McLaren ] Photo section dilema
Body:
PNG compresses much better than GIF. GIF sucks.
------
76 Mercury Capri GHIA / 77 Mercury Capri RSX
http://www.mercurycapri.com
Still working on it!
----- Original Message -----
From: negusm <negusm@y...>
Date: Saturday, May 31, 2003 2:56 pm
Subject: Re: [ASC McLaren ] Photo section dilema
> Well, I hate to have to say this but this is the skinny on JPGs vs
> Bitmaps vs Gifs.
>
> Gifs ARE compressed. It is a LOSSLESS compression. JPG is a
> LOSSY
> compression. A JPG image is almost always smaller than GIF for
> PHOTO like images because of the processing envolved which takes
> into account the way the human eye works and how colors will vary
> within a photo. Some of the image in a JPG is slightly altered to
> allow for a maximum benefit of the compression. So what your
> digital camera "sees" is not really preserved pixel for pixel in
> the
> file.
>
> HOWEVER, for pictures with a very small number of colors and
> especially large AREAS of single colors (like a cartoon or a
> banner
> with sinple text and no image effects), GIF is going to be much
> smaller than a JPG. Gif only does 256 colors.
>
> HOWEVER, you can bump up the compression on a JPG to make it
> smaller
> than a GIF but your image will suffer "artifacts" embedded in areas.
>
> If you are seeing JPGs bigger than GIFs it is probably that your
> compression is very LOW when saving the JPG and at LOW
> compression,
> a JPG starts to turn into a large file since it is doing almost no
> compression. Also when you convert a JPG to a GIF you go from
> 16.7
> MILLION colors to a mere 256 colors. You are throwing away ALOT
> of
> your image.
>
> A BITMAP is an exact pixel for pixel representation of an image
> and
> is rarely compressed. There is RLE encoding of bitmaps but it
> isn't
> much of a compression scheme.
>
> -Mike
>
>
--- In ascmclaren@yahoogroups.com, tasmaniac1 <no_reply@y...> wrote:
> > Marq,
> >
> > Do you mean .Bmp's to .jpg? .GIF's are even smaller then .jpg's.
> >
> > -Nick
> >
> >
> >
--- In ascmclaren@yahoogroups.com, "InfoSysSec"
> <infosyssec@i...>
> > wrote:
> > > Errrmmm... ah... unfortunately I have the knowledge of the
> various
> > fun things about the Net and so I will toss in a few pearls of
> > wisdom on this topic.
> > >
> > > With respect to the beautiful pictures of the cars. The
> ground
> > rules about posting or submitting pictures should be :
> > >
> > > a) all pictures submitted should be in a 640 X 400 pixel size.
>
> > Any larger size gobbles up bytes like you would not believe.
> You
> > can usually average five to ten 640 X 400 pixel pictures for
> every
> > one 1280 X 1000 picture. Or to put it in simple terms a 10k
> > picture compared to a 160k picture.
> > >
> > > b) all pictures should be submitted in the .jpg format.
> Many
> > pictures are submitted in the .gif format which is wasteful.
> > The .jpg format was created to provide the same quality of
> picture
> > as a .gif formatted picture - however through the magic of
> > compression a .jpg picture is ALWAYS smaller than the same
> picture
> > in a .gif format.
> > >
> > > There are 'free ware' software programs available that can '
> > resize ' pictures to the 640 X 400 format ( which is roughly the
> > physical size of a standard camera taken photo print. The
> larger
> > pixel size pictures usually have the physical size of a 8 1/2 X
> 11
> > inch picture.
> > >
> > > There are also 'free ware' software programs that can take
> convert
> > a .gif picture to a .jpg format.
> > >
> > > In some cases there are 'photo' programs available that can
> permit
> > the resizing of photos and also provide the option to save the
> photo
> > in the .jpg format ( even when you have loaded the picture into
> the
> > program from a .gif format ).
> > >
> > > Then to take things even further.... there are programs out
> > there called JPG Crunchers. Basically what they do is take
> a .jpg
> > file and further compress it to a smaller size while still
> > maintaining the quality and appearance of the picture. I have
> > taken 16k .jpg files, run them through a JPG Cruncher and the
> result
> > was a 5k compressed .jpg ( using a 30% reduction ).
> > >
> > > In all of the above cases, the photos will maintain their good
> > looks, be greatly reduced in physical size, and be downloadable
> at
> > an obviously greater speed than the big lumpy fat bloated pictures.
> > >
> > > So hopefully this information will answer the key questions of
> how
> > to more efficiently save and store pictures submitted for display.
> > >
> > > Marq
> > >
> > > ----- Original Message -----
> > > From: cassman108
> > > To: ascmclaren@yahoogroups.com
> > > Sent: Saturday, May 31, 2003 9:41 AM
> > > Subject: [ASC McLaren ] Photo section dilema
> > >
> > >
> > > I would also be willing to put a few bucks in to keep the
> photo
> > > section going. Although a better idea would be to ditch
> Yahoo
> > > altogether and start our own site w/ a similar setup as this
> > site. I
> > > don't know the how to do it technically or the costs
> involved,
> > but it
> > > seems like most people here would be willing to "subscribe"
> to
> > such a
> > > site by kicking in some $$, perhaps on an annual basis to
> keep
> > it
> > > going. It seems to me that if yahoo is going to start
> charging,
> > why
> > > not start our own and design it as we see fit? Anyone have
> any
> > idea
> > > on the costs involved? I'm willing to help out any way I
> can,
> > but I
> > > don't have the technical knownledge to get it rolling.
> > >
> > > Sean
> > >
> > >
> > >
> > >
> > >
> > >
> > > To unsubscribe from this group, send an email to:
> > >
> > >
> > >
> > >
> > > the Yahoo! Terms of
> > Service.
>
>
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