Change resolution? Yeah right!

Borrox wrote:

Hi

I am trying to put some stuff online and when I go to change the resolution to 72 it changes it from 150 to 149.9. What is going on? How do I make it change to 72. This has just started to happen. I have closed PS down and re done the scan and it still wants to only downsize it by 0.1!
Can anyone please help, I am tearing my hair out here.

Nig

Resolution is irrelevant for online images. The resolution it displays at will be whatever the viewer’s monitor resolution is.

Use Save for Web and don’t worry about it.

—
Comic book sketches and artwork:
http://www.sover.net/~hannigan/edjh.html
Comics art for sale:
http://www.sover.net/~hannigan/batsale.html

Borrox writes …

I am trying to put some stuff online and when I go to change the resolution to 72 it changes it from 150 to 149.9. What is going on?

First, what application will be displaying this image? Pretty much all the web browsers ignore the resolution (which is meaningful only when you scan or print), the size displayed on the screen is just the actual pixels. In other words a 600×400 pixel image at 72 ppi looks identical to a 600×400 pixel image at 400 ppi (or any other ppi).

If you really do need to change this number (for printing or for an ignorant art director or just a personal phobia or whatever) just do Image – Image Size and uncheck ‘resample image’ and set the ‘resolution’ value.

I have closed PS down and re
done the scan and it still wants to only downsize it by 0.1!

This may be a scanner driver issue … just change the resolution value *after* you scan with Image Size.

Bill

Borrox wrote:

I am trying to put some stuff online and when I go to change the resolution to 72 it changes it from 150 to 149.9. What is going on? How do I make it change to 72. This has just started to happen. I have closed PS down and re done the scan and it still wants to only downsize it by 0.1!

As a workaround, simply ignore the resolution. Browsers ignore it: they are only interested in the number of pixels.

Andrew

edjh wrote:

Borrox wrote:

Hi

I am trying to put some stuff online and when I go to change the resolution to 72 it changes it from 150 to 149.9. What is going on? How do I make it change to 72. This has just started to happen. I have closed PS down and re done the scan and it still wants to only downsize it by 0.1!

Can anyone please help, I am tearing my hair out here.

Nig

Resolution is irrelevant for online images. The resolution it displays at will be whatever the viewer’s monitor resolution is.

Use Save for Web and don’t worry about it.

NOTE: When resizing for web, determine what pixel dimensions (WxH)you need and resize accordingly in Image Size with Resampling checked. Then Save for Web.

—
Comic book sketches and artwork:
http://www.sover.net/~hannigan/edjh.html
Comics art for sale:
http://www.sover.net/~hannigan/batsale.html

Hi guys
Thanks all for replying and I really did not realise that the res was not so much an issue. I was always under the impression that images for online needed to be 72dpi. In fact when I was learning HTML there was a definite point made. Anyway, things change, so thanks for the update. I have just re-opened PS, scanned the same image done what I want with it and it let me change the res with no problem. What might cause this for future reference, although it may not now be an issue worth worrying about. Many thanks for you rapid replies.
Nig

Borrox wrote:

Hi guys
Thanks all for replying and I really did not realise that the res was not so much an issue. I was always under the impression that images for online needed to be 72dpi. In fact when I was learning HTML there was a definite point made. Anyway, things change, so thanks for the update. I have just re-opened PS, scanned the same image done what I want with it and it let me change the res with no problem. What might cause this for future reference, although it may not now be an issue worth worrying about. Many thanks for you rapid replies.
Nig

It’s a common misconception. Older monitors commonly had resolutions of 72 ppi; nowadays approx 96 is more common, but it doesn’t really matter for web graphics.

—
Comic book sketches and artwork:
http://www.sover.net/~hannigan/edjh.html
Comics art for sale:
http://www.sover.net/~hannigan/batsale.html

Hi guys,

I like to know what is the real diffarence between no of pixels and resolution……..

sita wrote:

I like to know what is the real diffarence between no of pixels and resolution……..

The number of pixels is how many pixels there are.
The resolution is how close together those pixels are, and consequently the size of each pixel.

Perhaps try thinking of it like a mosaic – each tile is a pixel.

Andrew

"Borrox" wrote in message

Hi guys
Thanks all for replying and I really did not realise that the res was not so much an issue. I was always under the impression that images for online needed to be 72dpi. In fact when I was learning HTML there was a definite point made. Anyway, things change, so thanks for the update. I have just re-opened PS, scanned the same image done what I want with it and it let me change the res with no problem. What might cause this for future reference, although it may not now be an issue worth worrying about. Many thanks for you rapid replies.
Nig

My system (and perhaps lots and lots of others) have the dpi set at 96. Thus whoever said that the online dpi needs to be 72 is in error. Jim

In article , Andrew Morton wrote:

Perhaps try thinking of it like a mosaic – each tile is a pixel.

So, when your TV picture goes all blocky, it’s really tessellated. 😎

—

Roger

Jim writes …

My system (and perhaps lots and lots of others) have the dpi set at 96. Thus whoever said that the online dpi needs to be 72 is in error.

You still don’t get it … this has no bearing on viewing web images since the browsers don’t refer to it. So he could set the resolution to 96 ppi (not dpi, as you said) or 72 or 4000 and the image will still look the same on your screen. It’s only a meaningful number when you print or when you scan.

Bill

"Bill Hilton" wrote in message
SNIP

It’s only a meaningful number when you print or when you scan.

For a specific output dimension, measured in pixels per inch/mm/etc., that is.

To elaborate a bit further, the pixels per inch (or dots per inch) metric isn’t relevant when outputting with an application that physically disregards file embedded ‘resolution’ settings. On displays, each pixel should occupy a physical space equal to either a phosphor mask aperture, or an LCD picture element.

Bart