Re: [OM] E-30

[Chuck Norcutt]

72 ppi is a number from old Apple displays long since gone the way of 
the dodo bird.  Most modern displays are in the 90-100 ppi range.  If 
you display an 800 pixel wide image it should take up 800 pixels.  The 
pixel pitch is irrelevant unless you want to force a particular physical 
dimension on the screen.

Chuck Norcutt

Wayne Harridge wrote:
> 
> 
> 
>> Chuck Norcutt <> wrote:
>>
>> No need to set resolution when setting pixel dimensions.  Resolution is 
>> a meaningless number unless accompanied by physical dimensions and, in 
>> that case, the two control the pixel dimensions.  Without specification 
>> of physical dimensions the resolution value is only "advisory" and plays 
>>
>> no part in any actual display of the image.
>>
> 
> interesting that if you have a screen with 72 ppi and you display your 800 
> pixel wide image at that resolution it will be 11.11111111111111111111111 
> inches wide on the screen !
> 
> ...Wayne
> 
> Wayne Harridge
> 
> http://lrh.structuregraphs.com
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