Resizing an image using preview help

Hi all,

I am having a website built, the web guys have set up templates for me to upload photos etc onto..

For example;
One of the templates needs images - 370px Width x 210px Height

(am assuming the px means pixels)

I have discovered how to resize using Preview but it also asks about pixels/inch or pixels/cm, the pre-set is 300...

What would I need?

Thanks in advance

is there anyone out there?

 

hello,

yes I'm using preview to resize, but when I do, it has a preset pixels/inch....

This is what I need help on... do I change this setting? For example;
One of the templates needs images - 370px Width x 210px Height
The pre-setting for this is 300 pixels/inch.....

Do I change the 300 pixels/inch or leave as is? Other photos come out at 72 pixels/inch....... it is never the same......

 

hi,

thank you so much for your reply..

the content is for a website, photographs of hotels.... the web guys said that they had set it so that whatever the size of the photo I put in the cms, it will come out on screen the correct size, but if I could scale the photos down the page would load quicker, so obviously I want to scale them down!

the photos that need to be 370/210 most come out as 72 dpi so I'll keep that as it is then.... but for the ones that come out as higher, should I lower it to 72 dpi?

the photos that need to be 156/113 come out at 304.8, 254, 300 etc etc, should I lower them down to 72 dpi? or leave them as is?

I received the photos from each hotel individually, I was told to request high resolution and most are....... should I assume that the dpi is different because each photo is different? So therefore should I just be more concerned about the size that is needed and just keep the dpi as whatever it is?

am I making sense?

 

great advice thank you and that program could well save some time bearing in mind I have around 4000 photos to deal with over the coming months!

Final question (I promise!) what dpi should I set them to?

 

ps. just tried downloading that app and the link doesn't work

 

hi,

thanks for taking the time to reply..

I read the article, which did help me understand more but then reading peoples comments after means I am now confused again...

most were saying, like yourself that the dpi doesn't matter, then 1 guy said this;

'When client pops a 8M digital photo into their content, even if we’ve restricted its physical display dims via the code so that it doesn’t blow out the layout, that image has various critical effects. 1) It loads slowly 2) It eats both server disk space & bandwidth 3) It reduces the quality of the user experience overall'


obviously, I don't want to risk any of this happening, and as I have to change all of the pixels heights and widths anyway (using preview), changing the dpi is no extra bother, so am still confused.....

 

but does it effect how long it takes the page to load?

 

thank you

just to clarify;

so when I am resizing images using preview as my web guys said to;

I choose the appropriate size i.e. 370px width /210px height, uncheck 'scale proportionally' (otherwise it doesn't let me change it), leave 'resample image' checked and just go with whatever resolution (ppi) appears, whether it be 304.8, 254 or 72 etc!

So this process is correct? and one that is 304.8 will not make the page load any slower than one that is 72? Sorry to be thick but am a bit new to this!

ps. really really appreciate your help (both of you)

 

sorry me again,

am just reading up on all of this and this article;
http://www.techsoup.org/learningcenter/software/page6045.cfm

states;

'Finally, Windows allows a monitor to display a maximum screen resolution of 72 PPI, so there's no point in saving an image at more than 72 PPI; doing so will only cause the image to load slower without giving the visitor any increase in quality. And because Web graphics generally have low PPI counts, they will probably blurry or fuzzy if you attempt to print them.'


am still confused!

 

one minute I think I've understood it, then another twist comes! I thought that is was ppi, because it is pixels per inch in preview....so dpi doesn't affect the speed but does ppi?

Sorry!

am wondering whether I should just set everything to 72 and be done with it!

ps. after resizing the images look fine, so until one looks weird I won't worry about any stretching etc as have a headache as it is!

 

this stuff isn't easy is it!

so to clarify, after changing the width/height, I'll just leave the resolution at whatever it is and whether it be 304.8, 254 or 72 etc the page will load at the same speed?

 

thank you both, I really really appreciate your time