David, All bluster aside, JCO's right on the technical side. The dpi listed in the file is irrelevant to the display on a monitor, where only the actual resolution of the file matters, dpi only matters on print output, where it determines the physical size of the printout.
As most displays are around 80-100ppi (72ppi is archaic and hasn't been the case since the mid-90's and the death of single-resolution monitors), a 1200 pixel image will be around 12-15" wide on most modern monitors (depending on the actual running resolution). -Adam David Savage wrote: > Suit yourself. > > All I know is your bucking a lot of tried and true practices for displaying > images on the web to suit your vision of how the rest of the internet using > population should be working. > > Cheers, > > Dave > > At 09:30 AM 3/04/2007, J. C. O'Connell wrote: >> Do the math, it aint anywhere near >> 240ppi, the data you are using/reading/believing is >> incorrect...The screen would have to be only >> 5" wide to get 240ppi with a 1200pixel wide image. >> I dont know anybody using that size screen or >> screen resolutions so extremely high that the displayed >> image would only be that wide on a typical 19" screen. >> jco >> >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of >> David Savage >> Sent: Monday, April 02, 2007 9:07 PM >> To: Pentax-Discuss Mail List >> Subject: RE: >> WebGallery:Barrett-JacksonCollectorCarAuctions2007WestPalmBeach... >> >> >> I'm getting my numbers from your files John. Here's a basic Photoshop >> lesson. >> >> Open a file in PS, this one will do: >> >> <http://www.jchriso.com/temp/BJWPB2007/images/BJWPB2007-000.jpg> >> >> Go to Image>Image Size... You will note: >> >> Pixel Dimensions >> Width: 1200 pixels >> Height: 801 pixels >> >> Document Size: >> Resolution: 240 pixels/inch (that's pixels per inch, or ppi) >> >> As I said, 240 ppi is a print resolution, 72 ppi is plenty enough for >> web >> images. >> >> Dave >> >> At 01:01 AM 3/04/2007, you wrote: >>> I dont know where you are getting 240ppi number from but >>> on a typical 19" monitor even a 1200 pixel wide image >>> is only about 100ppi which is NOT overkill, I can easily >>> see the improvement over 800 or even 1024 pixels wide. >>> jco >>> >>> -----Original Message----- >>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of >>> David Savage >>> Sent: Monday, April 02, 2007 12:02 PM >>> To: Pentax-Discuss Mail List >>> Subject: Re: >>> WebGallery:Barrett-JacksonCollectorCarAuctions2007WestPalmBeach... >>> >>> >>> Personally I always use 1024x768 as my assumed baseline resolution for >>> preparing web images, even though my system runs at 1280x1024. If I >>> think a particular shot suffers because of this, then I add a link to a >>> higher resolution file. >>> >>> And BTW John, 240 ppi for a web image is massive overkill, that's print >>> resolution. 72 is more than enough & it also results in smaller files >>> which is a bonus for those on slower connections. >>> >>> Dave > > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
