AI rasterizing
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- horton
i've asked this here before but never got a sure answer..
can anyone tell me how accurate the AI rasterizing feature is?
am i losing a lot of image information if i take a placed CMYK image in AI and rasterize to CMYK at the same res? i'm assuming the pixels are recalculated.. are the CMYK values fudged as well?
how does it compare to re-exporting back to a PS or TIFF file?
i'm trying to simplify a photo illustration with loads of layers and transparencies before going to magazine press.
- doesnotexist0
wouldnt you just export it?
- horton0
wouldnt you just export it?
doesnotexist
(Feb 10 06, 11:40)?
you mean export file art as an image.. TIFF or whatever?
that might be easiest, but i was trying to avoid rasterizing my type etc, so rasterizing the photo & illustration elements in AI seems easier than exporting pieces to PS and reimporting.
know what i mean?
- _salisae_0
are you laying a magazine out in illustrator?
- horton0
but if someone can tell me that exporting the photo and transparencies is infact more accurate than an AI rasterize, i would go that route.
?
- horton0
are you laying a magazine out in illustrator?
_salisae_
(Feb 10 06, 11:45)yeah its a page ad for a mag..
i would usually just submit native AI files or PDF but my layouts are getting complex with transparencies etc, so figure some way to rasterize all those pieces with the placed photo would be safest.
- _salisae_0
and you created your type in photoshop?
sorry. i'm having trouble picturing your sitatuion exactly.
- kodap0
copy/paste to PS naver gave me any problems
- horton0
and you created your type in photoshop?
sorry. i'm having trouble picturing your sitatuion exactly.
_salisae_
(Feb 10 06, 11:52)no no..
layout in AI with photo placed in and then loads of vector elements (with transparencies, effects etc) on top of placed photo.
and then there's text etc in the ad as well which i of course don't want rastered.
to simplify the layout for press i'd like to rasterize teh photo and transp vectors elements into one image with the AI ratserize engine.
dig?
- horton0
copy/paste to PS naver gave me any problems
kodap
(Feb 10 06, 11:57)* sigh
thanks i realize that but how about some hard facts or press experience with AI rasterize.
technically is the conversion to pixels any different than how PS would handle it.
- _salisae_0
i now understand your question but i do not know the answer.
i would assume that a process color press wouldn't have any trouble with your file as is
sorry
- jonnyquest0
When converting to raster anything that had a line work edge will no longer have 2400ppi along it's edge (at least that's what a scitex brisque RIP renders vor vector) your vector edge will always be determined by the final output RIP.when it flies through a RIP it's usually 1200-2400ppi on the edge. To answer your question you have to ask yourself what do you really want to look vector and what do you want raster. You can save out an illustrator EPS for just your type and then raster your base art and recombine them so you have vector text and raster background...
CMYK values shouldn't shift because illustrator is just filling shapes with your color callouts. where you may get a shift is if you raster your background art then bring it into photoshop and convert or tag it with an icc profile then the profile will shift the color. sometimes people have the p-shop color settings set to automatically convert images into the users working color space. raster at 100% of the actual output size doesn't look bad. type will always look a little fuzzy though.
- horton0
i would assume that a process color press wouldn't have any trouble with your file as is
sorry
_salisae_
(Feb 10 06, 12:07)yeah.. i usually feel the same way and send ai is, but its going to Euro and exchanging a few hands so who knows.
but thanks for your relies.
my workflow would just be simplified a few steps if i knew AI rasterize was equal to PS rasterize.
- horton0
nice thanks for that jonny - sounds as though you are saying AI rasterizing is pretty comparable to the way PS handles the same task.
my biggest concern is how the CMYK photo placed in AI is recalculated if its included in the AI rasterize (at the same res). i know the vectors get pixelized, and i'm keeping my small text and details on top as a vector layer.
thx!
- jonnyquest0
The only thing Illustrator and Photoshop Rasterization gives you is control of the rasterization and you'll be able to see the results immediately and you'll have done it yourself... Are they superior or equal to the Printer's actual output RIP?Probably not. Neither Photshop nor Illustrator where designed to be RIP's so their rasterization won't be equal to a nice high end RIP.. But the Results you see will be immediate and you can determine if they are suited for your needs. There will also be no guesswork because it'll be fairly WYSIWYG time.
The biggest problem with handing off your file is knowiing what postcript level RIP the print shop may or may not be using. A lot of what is generated out of Illustrator CS and CS2 (and the same can be said for Indesign) is so far ahead of RIP technology. A lot of places still have postscript Level 2 RIP's. A lot of the newer transparency features Illustrator and InDesign tout even freak out Level 3 Rip's...
If your file is set up right though any printer with a decent RIP should be able to output it.
- HafDed0
i know it's kinda a pain in the sac and creates huge file sizes, but for me i feel safer spending the extra time settin up a file that's got a less chance of gettin screwy / while keepin it as high rez as possible.
i'd export the photo elements that u can (inlcuding any transparencies / etc) into photoshop, exporting as a tiff, then layer that in with the fonts, convert the fonts to outlines, then save out as an .eps for the printer.
- horton0
ha.. just finished up my final files.
i went with AI rasterizing this time at an excessive 450dpi (just in case). But in the past i've done as you suggested and exported to PS/ replaced into AI.
so i guess i'll just have to wait and see ;)
- monNom0
short answer: yes.
they both use bicubic sampling for their anti-alias settings.
Illustrator actually gets a nod in the rasterization department as the sample depth is not limited to source pixels.BUT, if you did it in photoshop
you could mess around with sharpening at key places, touch up the colour, etc.so i'd suggest export out as .tiff or raster .eps
, mess around in PS, and link the file back in.make sure your document raster effect serttings (under effects) match your rasterize settings for best results.
and don't let photoshop touch your profile.
- horton0
niiice.. good to know infos. thanks monNom.