Preserved Topic: save as jpg (Page 1 of 1)

Working in PSD format. Is there a difference in the following functions?

"save as" then choose .jpg
"save for web" then choose .jpg

Seems to be 2 different ways of achieving the same thing. I could be wrong. . .

CRO8

they're basically the same but 'save for web' gives you more control over the output -- hence the extra clicky things that show up when you're trying to save the bastard.

cool.

I thought save for web also forced the image to 72 dpi. Is this true????

short answer: yes.

long answer: yes, but because monitors only display 72 dpi. anything larger and they just display the image larger

What on earth is the significance of DPI when you're saving to a digital file? It's a list of pixel colors, nothing more. If it's going to be compared to a ruler with inch measurement, it will have to be done with some sort of software which interprets the image at a certain DPI. In that case, it's the software's determination, not the image file's. JPEGs don't even *have* any place to store DPI information.

I hate it when programs do that.

Anyway, is the Save For Web option even worth looking into? I never looked at it much before. GIFs and JPEGs are easy enough without it...

Save for web also converts to rgb if your document is cmyk.

Save for web is much better. You can preview what you're about to save at various diffrent compression sttings, select your gif colors, matte colors etc. etc. Click the little tab that says 2 up to compare different settings with your original.

edit: tyop


[This message has been edited by cyoung (edited 05-16-2002).]

slime, if you care about small file sizes in gif you should really look into save for web.
there are a couple of helpful options you dont have in the normal save.

Even if you convert to indexed color mode before saving normally? That's what I usually do.

but what if you want less than the indexed colors?
what about dither?
lossyness?

(ok, you dont really need these things in practice, but they are there, just have a look!)

Just a couple of reasons?.

The ability to display the image in four frames with different compression formats and ratios applied is enough to make me use it alone but there?s a lot more.

You can see how bad the JPEG compression artefacts will be before you save. You can also zoom in on the document for a closer inspection of possible artefacts. Very useful if you run ultra high screen resolutions.

When converting to an indexed image you can zoom in and easily snap colors across into the optimised pallet from the original.

You don?t ever have to worry about saving your original PSD as a flattened indexed colored image! We?ve all done that once or twice.

When you save the image as a PSD it will also save the settings you used in "Save for web" so if you have to make a quick alteration to the original then you don?t have to worry too much about getting the compression bang on again.

It's also a must when it comes to using slices. Slices are good. Slices = I don't have to toy around with multiple files anywhere near as much when doing web work = Happy me!

If you don?t know what slices are then you really should read up on them.

I've also found that sometimes it's better to use PNG's rather than GIF's if you?re after small file sizes without transparency.

You can also preview you image or sliced set in a web browser. Although since the Save for Web doesn?t use PhotoShop?s dithering engine this can be a little pointless.

Oh yah. PhotoShop uses it?s own image processing engine and will apply any color calibration setting you have in the main document window. These are all deactivated in the save for web optimised frames.


That reason enough?

Yup, I've been shown the error of my ways. =)

I just hate the huge bulky interface. I'll experiment with it.