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RE: best compression strategy

  • Subject: RE: [iris-photos] best compression strategy
  • From: "Harold Peters" <harold@directcon.net>
  • Date: Mon, 28 Jun 2004 06:46:52 -0700
  • Importance: Normal

Thanks John. This is the information I was hoping for.

Harold Peters
Beautiful View Iris Garden
2048 Hickok Road
El Dorado Hills, CA 95762
harold@directcon.net <mailto:harold@directcon.net>
www.beautiful-view-iris.com


-----Original Message-----
From: John I Jones [mailto:jijones@usjoneses.com]
Sent: Sunday, June 27, 2004 9:33 PM
To: iris-photos@Yahoogroups.com
Subject: Re: [iris-photos] best compression strategy


Harold,

First of all, anything greater than 72 dpi just makes the picture
bigger on the screen. Virtually all computer monitors are 72 dpi.

Then decide what size in inches by inches you want the image to appear
on the screen.

So that gives you your basic file size. The only other way to make the
files size smaller is the compression ration you choose when you save
the file as a JPEG. Of course the greater the compression, the lower
the quality of the picture. But more often than not, you can't really
tell the difference. You don't want to try and use the same file for
any print work.

Photoshop has a great facility called "Save For Web". It automatically
converts files to 72 dpi and allows you to try several different
compression ratios and will display the compressed file size for you.

Most other programs don't give you the file size until you save it and
check for yourself.

John


On Jun 27, 2004, at 10:16 AM, Harold Peters wrote:

> Hopefully there are some computer  image experts lurking on this
> group. I am scanning 5" x 7" photos at 150 dpi for a web site. File
> sizes are 75 to 100 kb range. I need the file size to be 25 to 35 kb
> without cropping. Is there a best strategy for getting this reduction
> while maintaining a good to excellent image quality and the best
> image size for the viewers?  
>  
> Harold Peters
> Beautiful View Iris Garden
> 2048 Hickok Road
> El Dorado Hills, CA 95762
> harold@directcon.net  www.beautiful-view-iris.com
>  
>
>
>
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>
John                | "There be dragons here"
                          |  Annotation used by ancient cartographers
                          |  to indicate the edge of the known world.

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________________________________________________
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