Mac Discussion

Can anyone tell me if there's a good batch converter out there to convert JPEG's to TIFFS? I do have graphic converter, but can't get it to convert the resolution to 150 dpi, it keeps em at 72 dpi. Any thoughts?

Thanks as always!

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I am B. . . . .

Photoshop?

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Posting And You: [www.albinoblacksheep.com]

Graphic Converter. In the Convert & Modify window:

Edit Batches... Resolution.

Photoshop is great for setting up your specific batch conversion.

Can't figure out how to get PS to do it. I've tried googling this method as well. Maybe I'm not doing the search correctly

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I am B. . . . .

> Can't figure out how to get PS to do it.

Did you follow my instructions for GraphicConverter?

the photoshop route in a nutshell:

open one of your jpgs
open actions window
create new action
hit record button
change rez and save as tiff to new folder
stop recording
close jpg

file > automate > batch
select saved action from pulldown
select source folder of jpgs
select new folder for destination folder
hit ok

If what you are saying is you have 72dpi jpeg images and you want to convert them to 150dpi TIFF images you world have to make the TIFF images much smaller in size to achieve a conversion. 72dpi images are meant for viewing on a monitor, not for print output. A program like Genuine Fractals(on One Software) might work, assuming the originals don't have a copywrite or watermark of another photographer on them.

excellent, thanks for the info

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I am B. . . . .

The Black Adder Wrote:
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> > Can't figure out how to get PS to do it.
>
> Did you follow my instructions for
> GraphicConverter?


Yeah, I tried, but it doesen't give me any options to change resolution, just file type. There's only a "convert" menu, no "modify"

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I am B. . . . .

The Black Adder Wrote:
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> > Can't figure out how to get PS to do it.
>
> Did you follow my instructions for
> GraphicConverter?


Actually, I take that back Adder. There is an option to change the "PPI", but that doesn't do anything to the final resolution for me. i don't really want to get into trying some weird PPI to DPI conversions (if such a thing even exists, as most people see them a 2 very different things).

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I am B. . . . .

romanticf16 Wrote:
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> If what you are saying is you have 72dpi jpeg
> images and you want to convert them to 150dpi TIFF
> images you world have to make the TIFF images much
> smaller in size to achieve a conversion. 72dpi
> images are meant for viewing on a monitor, not for
> print output. A program like Genuine Fractals(on
> One Software) might work, assuming the originals
> don't have a copywrite or watermark of another
> photographer on them.


I have a very specific reason for doing the conversion, but thanks for the input. :)

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I am B. . . . .

DPI? DPI is irrelevant. What matters is how many pixels are in the picture. The DPI only matters according to how you view it on your screen, or how you print it out. I mean, if I take a 1600 x 1200 and email it to a bunch of different people, I have no control over the DPI, as people have different resolution monitors, and different viewing preferences. Someone could have a 19" 1280 by 1024 monitor, and view it as large as they can, but regardless of their viewing size, it will always be 91 dots per inch, because that's how densely the pixels are packed into the monitor. If they scale that image 50%, it's not like they are actually getting more dots per inch; they're still looking at 91dpi, just fewer pixels. If they scale the image to the size of the screen (80%), they are still looking at 91dpi. Another person could be viewing it at 100% on their 27" iMac, and they would be looking at 109dpi, because that's how closely the pixels are packed into that machine's display.

If you're talking about prints, then just figure out how big the prints will be, and do the math. If you're going to make 4 x 6 prints, then you know your image needs to be 900 by 600 pixels to get 150dpi. But if you send that image to someone else, there's nothing from preventing that person from printing it out as an 8x10 photo, and getting a much lower DPI (or even printing it as a 2x3 and getting 300dpi).

What are you trying to achieve anyway, and why the big concern about 150dpi? And what's the point of converting JPEG to TIFF?

The 72dpi that Graphic Converter reports just means actual pixels, since back in the day, most monitors were 72dpi.

I have actually taught pre-press at the college level, but thanks for the lesson. Much appreciated. I JUST wanted to know a method for doing do, that's all.Thanks again everyone.

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I am B. . . . .

maleek Wrote:
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> > Did you follow my instructions for
> > GraphicConverter?
>
>
> Yeah, I tried, but it doesen't give me any options
> to change resolution, just file type. There's only
> a "convert" menu, no "modify"

How were you trying to do a batch conversion in GraphicConverter without opening the "Convert & Modify" window?

What version of GraphicConverter are you using?

The batch conversion window hasn't been called "Convert" for several years.


> I have actually taught pre-press at the college level

That kind of bragging is lame. Especially in this context. You're asking for help with something that someone with the expertise to teach pre-press should know without even thinking about it.

Thanks again. Sorry for my lameness. . wasn't bragging, it's just easy to get off topic on posts. I don't pretend to know everything, nor would I ever try. I do wish I had thought of the name "Black Adder" though, you sound dangerous.

I really just wanted a simple answer to my question without going to in-depth as to why. "Aaaargh" the photoshop actions worked out great, not something I would even have though about. Let's put this thing to rest shall we? Unless of course, there are some who will feel the inevitable need to flame. . .

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I am B. . . . .

> the photoshop actions worked out great

Glad of that. You should check out GraphicConverter 6, tho. There's almost no limit to the stuff you can do in a quick batch-job in GC. It's also much faster than PS.


> Let's put this thing to rest shall we?

Sure. Whatever.

maleek Wrote:
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> I really just wanted a simple answer to my
> question without going to in-depth as to why.
> "Aaaargh" the photoshop actions worked out great,
> not something I would even have though about.
> Let's put this thing to rest shall we?
>
> --------------------------------------------------
> ----
>
> I am B. . . . .

glad i could help. i too was tempted to comment on the rez v quality issue, but as we can see, that's a whole 'nother can o' beans ...

The built in Image Processor in Photoshop would also do it

Got it done guys! Thanks everyone. "Black Adder", you weren't lying. GC 6 is a heck of a lot better than V.4 I was using.

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I am B. . . . .

maleek Wrote:
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> I have actually taught pre-press at the college level....

So have I.
And I knew very little about it.
If the pay was better and I got benefits, I would have kept the job.
Might have even learned something.
But I made more money fixing VW engines.
But I didn't know much about that either.

maleek Wrote:
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> Can anyone tell me if there's a good batch
> converter out there to convert JPEG's to TIFFS?

Yes, it's built-in. Just use Automator:



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Nemo me impune lacessit