adjusting contrast & brightness of pages of a PDF file
W. McCarthy
PDF files (just upgraded from version 5 to 6) and am in need of
guidance. How does one -- or, can one -- adjust the contrast and
brightness of the pages of a freshly created Acrobat document? Is the
tool buried in a menu somewhere, or is it necessary to buy a plug-in?
Any help will, of course, be appreciated.
Bill McC
Dick Margulis
below your screen.
W. McCarthy
Well, yes, there are those buttons. But, let's suppose that I know
where the tiny buttons are, how they work, and that my monitor has
been properly adjusted. An image in Photoshop or some other such editor
can be lightened or darkened, its contrast can be increased or
decreased. Are there software buttons in Acrobat that can effect a
permanent alternation of the image of pages in a PDF file?
In article <3EDC0F09...@fiam.net>, Dick Margulis
Aandi Inston
>
>Well, yes, there are those buttons. But, let's suppose that I know
>where the tiny buttons are, how they work, and that my monitor has
>been properly adjusted. An image in Photoshop or some other such editor
>can be lightened or darkened, its contrast can be increased or
>decreased. Are there software buttons in Acrobat that can effect a
>permanent alternation of the image of pages in a PDF file?
We've thought of writing such a plug-in. So far as I know, nobody ever
has.
----------------------------------------
Aandi Inston qu...@dial.pipex.com http://www.quite.com
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Dick Margulis
Aandi Inston wrote:
> "W. McCarthy" <mcca...@his.com> wrote:
>
>
>>Well, yes, there are those buttons. But, let's suppose that I know
>>where the tiny buttons are, how they work, and that my monitor has
>>been properly adjusted. An image in Photoshop or some other such editor
>>can be lightened or darkened, its contrast can be increased or
>>decreased. Are there software buttons in Acrobat that can effect a
>>permanent alternation of the image of pages in a PDF file?
>>
>
> We've thought of writing such a plug-in. So far as I know, nobody ever
> has.
>
Aandi,
Maybe you can explain the concept in another way. I still don't get what
WM is asking for. If the document is created using "black" type on
"white" paper, for example, would you want the ability to tune the RGB
values of "black" and "white"? Wouldn't this be handled better in the
publishing program? Same for colored vector and raster images. I mean
changing Distiller settings is one thing, but after the fact in Acrobat?
What would be the purpose?
Dick
Martin Evans
>Dick Margulis <marg...@fiam.net> wrote:
>>
>>Maybe you can explain the concept in another way. I still don't get what
>>WM is asking for. If the document is created using "black" type on
>>"white" paper, for example, would you want the ability to tune the RGB
>>values of "black" and "white"? Wouldn't this be handled better in the
>>publishing program? Same for colored vector and raster images. I mean
>>changing Distiller settings is one thing, but after the fact in Acrobat?
>>What would be the purpose?
>
>The way I see it, this would be adjusting brightness and contrast
>between black and white - in effect a kind of gamma. Not clear how
>many people want this, but it's becoming clear that some do.
I'd find a negative/invert feature quite useful although I've not come
across an implementation yet.
Have I looked in the right places?
--
JR Boulay
>>
>> > This must be a fairly simple procedure, but I am new to the
>> > creation of PDF files (just upgraded from version 5 to 6) and am in
>> > need of guidance. How does one -- or, can one -- adjust the
>> > contrast and brightness of the pages of a freshly created Acrobat
>> > document? Is the tool buried in a menu somewhere, or is it
>> > necessary to buy a plug-in? Any help will, of course, be
>> > appreciated. Bill McC
>> >
In Acrobat's prefs, set the image editor to Photoshop 6/7.
Then, right-clic on any image in your PDF file with the Acrobat object
Touch-up tool and choose "Edit image".
Saving with Photoshop will drop back modifications in the PDF file.
But in all cases, it's better to adjust images before PDF conversion
than after...
;-)
JR
Dick Margulis
JR Boulay wrote:
My understanding is that he was asking how to change the contrast of the
document (as viewed on the monitor? as printed?) rather than that of a
particular image.
What I've seen requested much more often is a way to change the color of
the blank document window.
>
W. McCarthy
on any given monitor; but, of course, I am hoping to change the nature
of the scanned image itself, not simply to adjust a particular
monitor's settings.
One problem that I regularly encounter: scans of old, yellowed pages
produce poor images whose contrast -- between scanned type and scanned
page -- I would like to be able to adjust. Photoshop or
GraphicConverter accomplish this sort of thing, sort of, but apparently
only one page at a time and the resulting PDF don't look that good (but
perhaps this is just my failing). I was hoping that Acrobat itself
contained a tool that would allow one to do this sort of image editing
over a range of pages (as its tools that allow rotation and croppping
already do).
In article <3EDD229E...@fiam.net>, Dick Margulis
Dick Margulis
previous comments in this thread.
JR Boulay
> I was referring in part to the image of the document as it appears
> on any given monitor; but, of course, I am hoping to change the
> nature of the scanned image itself, not simply to adjust a particular
> monitor's settings.
> One problem that I regularly encounter: scans of old, yellowed
> pages produce poor images whose contrast -- between scanned type and
> scanned page -- I would like to be able to adjust. Photoshop or
> GraphicConverter accomplish this sort of thing, sort of, but
> apparently only one page at a time and the resulting PDF don't look
> that good (but perhaps this is just my failing). I was hoping that
> Acrobat itself contained a tool that would allow one to do this sort
> of image editing over a range of pages (as its tools that allow
> rotation and croppping already do).
>
You may use Photoshop for this job.
It have nice batch tools and produce nice PDFs ;-)
(And Photoshop really crops, when Acrobat only mask, even with bitmap
images)
JR