Printing and Plotting

## Printing and Plotting

*Molinaro, Sam
Message 1 of 4 (719 Views)

# Formula to convert inches to JPG pixel sizes?

719 Views, 3 Replies
05-08-2002 11:50 PM
Hi all,

I am using AutoCAD 2002 and plotting to JPG format which gives me output
options of standard screen resolutions (i.e. Super XGA - 1280 x 1024
Pixels). My question is, is there a formula to calculate the Pixel
equivalent of an imperial sheet size .. say a 11" x 17" sheet. I typically
set scale to fit but this means that there is "blank space" at the top or
side of the jpg image depending on the proportions of the drawing and the
selected pixel sizes. I am hoping to eliminate this "blank space" by
providing the exact pixel sizes.

*Support\, Autodesk
Message 2 of 4 (719 Views)

# Re: Formula to convert inches to JPG pixel sizes?

05-09-2002 01:23 AM in reply to: *Molinaro, Sam
Sam,

See if this document helps you.

Understanding dpi resolution with the Raster File Formats HDI plotter driver
http://support.autodesk.com/getDoc.asp?id=TS55657

Thanks,
Danny Hubbard
Autodesk Product Support, Platform Technology Group
http://www.autodesk.com/support

"Sam Molinaro" wrote in message
> Hi all,
>
> I am using AutoCAD 2002 and plotting to JPG format which gives me output
> options of standard screen resolutions (i.e. Super XGA - 1280 x 1024
> Pixels). My question is, is there a formula to calculate the Pixel
> equivalent of an imperial sheet size .. say a 11" x 17" sheet. I
typically
> set scale to fit but this means that there is "blank space" at the top or
> side of the jpg image depending on the proportions of the drawing and the
> selected pixel sizes. I am hoping to eliminate this "blank space" by
> providing the exact pixel sizes.
>
>
>
*White, Ian A.
Message 3 of 4 (719 Views)

# Re: Formula to convert inches to JPG pixel sizes?

05-09-2002 06:43 AM in reply to: *Molinaro, Sam
On Thu, 9 May 2002 07:50:22 -0700, "Sam Molinaro"
wrote:

>Hi all,
>
>I am using AutoCAD 2002 and plotting to JPG format which gives me output
>options of standard screen resolutions (i.e. Super XGA - 1280 x 1024
>Pixels). My question is, is there a formula to calculate the Pixel
>equivalent of an imperial sheet size .. say a 11" x 17" sheet. I typically
>set scale to fit but this means that there is "blank space" at the top or
>side of the jpg image depending on the proportions of the drawing and the
>selected pixel sizes. I am hoping to eliminate this "blank space" by
>providing the exact pixel sizes.

Work out what resolution you want the image to be (i.e. whether you want
150 dpi, or 200 dpi, or 300 dpi, or 600 dpi) and then multiply the
resolution you have chosen by the length in inches.

--

Regards,

Ian A. White, CPEng
WAI Engineering
Sydney 2000
Australia

Ph: +61 418 203 229
Fax: +61 2 9622 0450
*Molinaro, Sam
Message 4 of 4 (719 Views)

# Re:

05-09-2002 09:49 PM in reply to: *Molinaro, Sam
Thanks to all that responded. It is very simple now that I understand what I
am doing.

"Ian A. White" wrote in message
news:a9rldu4q30av65055s6ietohlv4l1aqpui@4ax.com...
> On Thu, 9 May 2002 07:50:22 -0700, "Sam Molinaro"
> wrote:
>
> >Hi all,
> >
> >I am using AutoCAD 2002 and plotting to JPG format which gives me output
> >options of standard screen resolutions (i.e. Super XGA - 1280 x 1024
> >Pixels). My question is, is there a formula to calculate the Pixel
> >equivalent of an imperial sheet size .. say a 11" x 17" sheet. I
typically
> >set scale to fit but this means that there is "blank space" at the top or
> >side of the jpg image depending on the proportions of the drawing and the
> >selected pixel sizes. I am hoping to eliminate this "blank space" by
> >providing the exact pixel sizes.
>
> Work out what resolution you want the image to be (i.e. whether you want
> 150 dpi, or 200 dpi, or 300 dpi, or 600 dpi) and then multiply the
> resolution you have chosen by the length in inches.
>
> --
>
> Regards,
>
> Ian A. White, CPEng
> WAI Engineering
> Sydney 2000
> Australia
>
> Ph: +61 418 203 229
> Fax: +61 2 9622 0450