Re: Re: How does one obtain the resolution of an image inPHP?

- Edwin - wrote:

Reading the surrounding sentences, I think I can see where you're coming from. But, the above statement is a bit confusing. There is a reason why it's called "pixel per INCH". And it definitely have something to do whether your monitor is set to 800x600, 1024x768, etc. It's confusing but it's not ;)

It's quite hard to explain but having the monitor set to 800x600 the physical inch isn't anymore. the image is still in 80ppi but using now the "bigger" pixels as reference per inch. This is very confusing and this whole ppi is very disturbing, because there isn't any real standard applyable for screens.

A 15-inch monitor at 800x600 will have around 53ppi x 40ppi (800 pixels divided by 15 inches, etc.) and *the same* monitor at 1024x768 will have around 68ppi x 51ppi. That's correct the ppi (theoretically) will be 53 or 68.

If your 15' monitor is normally setup at 1024x768, everything (images, etc.) will look a bigger if the same image is viewed using the same monitor at 800x600. This happens because the pixels are now "bigger". (One image "pixel" is now compose of many physical dots on the screen.) But, I guess, you already knew that. (^_^) Right ;)

But the image is still in 80 ppi ;) And you probably now get where the problems are ;) Barry -- Smileys rule (cX.x)C --o(^_^o) Dance for me! ^(^_^)o (o^_^)o o(^_^)^ o(^_^o)