Re: DPI Recommendation for Images

[Shlomo Perets]

Alan Litchfield wrote:


... There is no value that I see in trying to dictate to the reader what
they will see at any specified zoom. The reader will decide what is
`good enough' for their viewing pleasure.  ...



Forcing a specific zoom (related to the DPI value at which the screen 
captures are placed in FM) is indeed not practical, especially since 
readers can easily switch between view settings of Fit Page, Fit Width etc. 
(that result in different zoom levels in different computers/screens).


However, this variable zoom effectively guarantees that the rendering of 
screen captures will be suboptimal, with different levels of distortion 
(missing pixels and/or blurred display). This is not a problem when the PDF 
is primarily intended for print purposes, but many PDFs are primarily used 
on-screen (even when the intended use is print, e.g. to benefit from 
interactivity/search).


No easy solutions, unfortunately. Displaying the screen capture without any 
distortion is possible through off-page display -- see different examples 
at http://www.microtype.com/ImprovePDF29.html .


[ The same issue applies directly to the display of SWF screen movies 
(where FM8/9/10 only support in-document placement; distortion of movie 
display in the PDF is practically guaranteed), see comparison of playback 
modes at http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes.pdf 
or 
http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes-Native.pdf , 
Acrobat/Reader 9 or higher ]




Shlomo Perets

MicroType, http://www.microtype.com
FrameMaker/TCS training  consulting * FM-to-Acrobat TimeSavers/Assistants



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RE: DPI Recommendation for Images

[Alison Craig]

I have to admit to being curious about this discussion as image quality has 
never been an issue for me (if it matters: FM9, all patched on Windows 7).

I use only EPS files or, if I need to insert arrows or other highlighted 
options on an image, I use a TIF or PNG inside a Visio file which I then save 
to PDF. All images are imported by reference. (I *very* seldom scale a PDF 
after importing it and if I do, I try to keep it within a few percentage points 
of 100%.)

I create my final PDFs twice from the same book setup with different joboption 
files so I get a digital version for viewing and a press quality one for 
printing on a professional, 600 dpi, high-speed, colour laser (with/without 
links and lower/higher image downsample settings are the major differences).

Both of these options result in good, onscreen image quality at reasonable zoom 
levels (if you're going to zoom to 600% or 1000%, you get what you get).

I have to plead major ignorance in the field of images, so how did I luck into 
a reliable method which I devised after a little trial and error?

Alison


-Original Message-
From: framers-boun...@lists.frameusers.com 
[mailto:framers-boun...@lists.frameusers.com] On Behalf Of Shlomo Perets
Sent: March 25, 2011 3:04 AM
To: framers@lists.frameusers.com
Subject: Re: DPI Recommendation for Images

Alan Litchfield wrote:

... There is no value that I see in trying to dictate to the reader what
they will see at any specified zoom. The reader will decide what is
`good enough' for their viewing pleasure.  ...


Forcing a specific zoom (related to the DPI value at which the screen 
captures are placed in FM) is indeed not practical, especially since 
readers can easily switch between view settings of Fit Page, Fit Width etc. 
(that result in different zoom levels in different computers/screens).

However, this variable zoom effectively guarantees that the rendering of 
screen captures will be suboptimal, with different levels of distortion 
(missing pixels and/or blurred display). This is not a problem when the PDF 
is primarily intended for print purposes, but many PDFs are primarily used 
on-screen (even when the intended use is print, e.g. to benefit from 
interactivity/search).

No easy solutions, unfortunately. Displaying the screen capture without any 
distortion is possible through off-page display -- see different examples 
at http://www.microtype.com/ImprovePDF29.html .

[ The same issue applies directly to the display of SWF screen movies 
(where FM8/9/10 only support in-document placement; distortion of movie 
display in the PDF is practically guaranteed), see comparison of playback 
modes at http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes.pdf 
or 
http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes-Native.pdf , 
Acrobat/Reader 9 or higher ]



Shlomo Perets

MicroType, http://www.microtype.com
FrameMaker/TCS training  consulting * FM-to-Acrobat TimeSavers/Assistants



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Re: DPI Recommendation for Images

[Joe Malin]

I think that you chose well by having a digital version and a print version.
That immediately solves one of the major problems.

I use the rubric save big and shrink down, that is, make relatively big
images and then scale them down. Scaling algorithms do reasonably well at
throwing away information. Nothing does well at creating information from
nothing. The larger the original image, the more pixels you have for any
particular image point. The algorithm can always throw away extra pixels or
color levels.

Multiple scaling is also a no-no. Scale the image *once*. Scale the document
it goes into *once*. Scalings are multiplicative.

Alas, not enough formats out there support vector graphics. We're incredibly
fortunate that the world has adopted what are essentially vector fonts.

On Fri, Mar 25, 2011 at 10:09 AM, Alison Craig
alison.cr...@ultrasonix.comwrote:


 I have to admit to being curious about this discussion as image quality has
 never been an issue for me (if it matters: FM9, all patched on Windows 7).

 I use only EPS files or, if I need to insert arrows or other highlighted
 options on an image, I use a TIF or PNG inside a Visio file which I then
 save to PDF. All images are imported by reference. (I *very* seldom scale a
 PDF after importing it and if I do, I try to keep it within a few percentage
 points of 100%.)

 I create my final PDFs twice from the same book setup with different
 joboption files so I get a digital version for viewing and a press quality
 one for printing on a professional, 600 dpi, high-speed, colour laser
 (with/without links and lower/higher image downsample settings are the major
 differences).

 Both of these options result in good, onscreen image quality at reasonable
 zoom levels (if you're going to zoom to 600% or 1000%, you get what you
 get).

 I have to plead major ignorance in the field of images, so how did I luck
 into a reliable method which I devised after a little trial and error?

 Alison


 -Original Message-
 From: framers-boun...@lists.frameusers.com [mailto:
 framers-boun...@lists.frameusers.com] On Behalf Of Shlomo Perets
 Sent: March 25, 2011 3:04 AM
 To: framers@lists.frameusers.com
 Subject: Re: DPI Recommendation for Images

 Alan Litchfield wrote:

 ... There is no value that I see in trying to dictate to the reader what
 they will see at any specified zoom. The reader will decide what is
 `good enough' for their viewing pleasure.  ...


 Forcing a specific zoom (related to the DPI value at which the screen
 captures are placed in FM) is indeed not practical, especially since
 readers can easily switch between view settings of Fit Page, Fit Width etc.
 (that result in different zoom levels in different computers/screens).

 However, this variable zoom effectively guarantees that the rendering of
 screen captures will be suboptimal, with different levels of distortion
 (missing pixels and/or blurred display). This is not a problem when the PDF
 is primarily intended for print purposes, but many PDFs are primarily used
 on-screen (even when the intended use is print, e.g. to benefit from
 interactivity/search).

 No easy solutions, unfortunately. Displaying the screen capture without any
 distortion is possible through off-page display -- see different examples
 at http://www.microtype.com/ImprovePDF29.html .

 [ The same issue applies directly to the display of SWF screen movies
 (where FM8/9/10 only support in-document placement; distortion of movie
 display in the PDF is practically guaranteed), see comparison of playback
 modes at
 http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes.pdf
 or
 http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes-Native.pdf,
 Acrobat/Reader 9 or higher ]



 Shlomo Perets

 MicroType, http://www.microtype.com
 FrameMaker/TCS training  consulting * FM-to-Acrobat TimeSavers/Assistants



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DPI Recommendation for Images

[Shlomo Perets]

Alan Litchfield wrote:

>... There is no value that I see in trying to dictate to the reader what
>they will see at any specified zoom. The reader will decide what is
>`good enough' for their viewing pleasure.  ...


Forcing a specific zoom (related to the DPI value at which the screen 
captures are placed in FM) is indeed not practical, especially since 
readers can easily switch between view settings of Fit Page, Fit Width etc. 
(that result in different zoom levels in different computers/screens).

However, this variable zoom effectively guarantees that the rendering of 
screen captures will be suboptimal, with different levels of distortion 
(missing pixels and/or blurred display). This is not a problem when the PDF 
is primarily intended for print purposes, but many PDFs are primarily used 
on-screen (even when the intended use is print, e.g. to benefit from 
interactivity/search).

No easy solutions, unfortunately. Displaying the screen capture without any 
distortion is possible through "off-page" display -- see different examples 
at http://www.microtype.com/ImprovePDF29.html .

[ The same issue applies directly to the display of SWF screen movies 
(where FM8/9/10 only support in-document placement; distortion of movie 
display in the PDF is practically guaranteed), see comparison of playback 
modes at http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes.pdf 
or 
http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes-Native.pdf , 
Acrobat/Reader 9 or higher ]



Shlomo Perets

MicroType, http://www.microtype.com
FrameMaker/TCS training & consulting * FM-to-Acrobat TimeSavers/Assistants

DPI Recommendation for Images

[Alison Craig]

I have to admit to being curious about this discussion as image quality has 
never been an issue for me (if it matters: FM9, all patched on Windows 7).

I use only EPS files or, if I need to insert arrows or other highlighted 
options on an image, I use a TIF or PNG inside a Visio file which I then save 
to PDF. All images are imported by reference. (I *very* seldom scale a PDF 
after importing it and if I do, I try to keep it within a few percentage points 
of 100%.)

I create my final PDFs twice from the same book setup with different joboption 
files so I get a digital version for viewing and a press quality one for 
printing on a professional, 600 dpi, high-speed, colour laser (with/without 
links and lower/higher image downsample settings are the major differences).

Both of these options result in good, onscreen image quality at reasonable zoom 
levels (if you're going to zoom to 600% or 1000%, you get what you get).

I have to plead major ignorance in the field of images, so how did I luck into 
a reliable method which I devised after a little trial and error?

Alison


-Original Message-
From: framers-bounces at lists.frameusers.com 
[mailto:framers-boun...@lists.frameusers.com] On Behalf Of Shlomo Perets
Sent: March 25, 2011 3:04 AM
To: framers at lists.frameusers.com
Subject: Re: DPI Recommendation for Images

Alan Litchfield wrote:

>... There is no value that I see in trying to dictate to the reader what
>they will see at any specified zoom. The reader will decide what is
>`good enough' for their viewing pleasure.  ...


Forcing a specific zoom (related to the DPI value at which the screen 
captures are placed in FM) is indeed not practical, especially since 
readers can easily switch between view settings of Fit Page, Fit Width etc. 
(that result in different zoom levels in different computers/screens).

However, this variable zoom effectively guarantees that the rendering of 
screen captures will be suboptimal, with different levels of distortion 
(missing pixels and/or blurred display). This is not a problem when the PDF 
is primarily intended for print purposes, but many PDFs are primarily used 
on-screen (even when the intended use is print, e.g. to benefit from 
interactivity/search).

No easy solutions, unfortunately. Displaying the screen capture without any 
distortion is possible through "off-page" display -- see different examples 
at http://www.microtype.com/ImprovePDF29.html .

[ The same issue applies directly to the display of SWF screen movies 
(where FM8/9/10 only support in-document placement; distortion of movie 
display in the PDF is practically guaranteed), see comparison of playback 
modes at http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes.pdf 
or 
http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes-Native.pdf , 
Acrobat/Reader 9 or higher ]



Shlomo Perets

MicroType, http://www.microtype.com
FrameMaker/TCS training & consulting * FM-to-Acrobat TimeSavers/Assistants



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DPI Recommendation for Images

[Joe Malin]

I think that you chose well by having a digital version and a print version.
That immediately solves one of the major problems.

I use the rubric "save big and shrink down", that is, make relatively big
images and then scale them down. Scaling algorithms do reasonably well at
throwing away information. Nothing does well at creating information from
nothing. The larger the original image, the more pixels you have for any
particular image point. The algorithm can always throw away extra pixels or
color levels.

Multiple scaling is also a no-no. Scale the image *once*. Scale the document
it goes into *once*. Scalings are multiplicative.

Alas, not enough formats out there support vector graphics. We're incredibly
fortunate that the world has adopted what are essentially vector fonts.

On Fri, Mar 25, 2011 at 10:09 AM, Alison Craig
wrote:

>
> I have to admit to being curious about this discussion as image quality has
> never been an issue for me (if it matters: FM9, all patched on Windows 7).
>
> I use only EPS files or, if I need to insert arrows or other highlighted
> options on an image, I use a TIF or PNG inside a Visio file which I then
> save to PDF. All images are imported by reference. (I *very* seldom scale a
> PDF after importing it and if I do, I try to keep it within a few percentage
> points of 100%.)
>
> I create my final PDFs twice from the same book setup with different
> joboption files so I get a digital version for viewing and a press quality
> one for printing on a professional, 600 dpi, high-speed, colour laser
> (with/without links and lower/higher image downsample settings are the major
> differences).
>
> Both of these options result in good, onscreen image quality at reasonable
> zoom levels (if you're going to zoom to 600% or 1000%, you get what you
> get).
>
> I have to plead major ignorance in the field of images, so how did I luck
> into a reliable method which I devised after a little trial and error?
>
> Alison
>
>
> -Original Message-
> From: framers-bounces at lists.frameusers.com [mailto:
> framers-bounces at lists.frameusers.com] On Behalf Of Shlomo Perets
> Sent: March 25, 2011 3:04 AM
> To: framers at lists.frameusers.com
> Subject: Re: DPI Recommendation for Images
>
> Alan Litchfield wrote:
>
> >... There is no value that I see in trying to dictate to the reader what
> >they will see at any specified zoom. The reader will decide what is
> >`good enough' for their viewing pleasure.  ...
>
>
> Forcing a specific zoom (related to the DPI value at which the screen
> captures are placed in FM) is indeed not practical, especially since
> readers can easily switch between view settings of Fit Page, Fit Width etc.
> (that result in different zoom levels in different computers/screens).
>
> However, this variable zoom effectively guarantees that the rendering of
> screen captures will be suboptimal, with different levels of distortion
> (missing pixels and/or blurred display). This is not a problem when the PDF
> is primarily intended for print purposes, but many PDFs are primarily used
> on-screen (even when the intended use is print, e.g. to benefit from
> interactivity/search).
>
> No easy solutions, unfortunately. Displaying the screen capture without any
> distortion is possible through "off-page" display -- see different examples
> at http://www.microtype.com/ImprovePDF29.html .
>
> [ The same issue applies directly to the display of SWF screen movies
> (where FM8/9/10 only support in-document placement; distortion of movie
> display in the PDF is practically guaranteed), see comparison of playback
> modes at
> http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes.pdf
> or
> http://www.microtype.com/showcase/MultimediaAsst/PlaybackModes-Native.pdf,
> Acrobat/Reader 9 or higher ]
>
>
>
> Shlomo Perets
>
> MicroType, http://www.microtype.com
> FrameMaker/TCS training & consulting * FM-to-Acrobat TimeSavers/Assistants
>
>
>
> ___
>
>
> You are currently subscribed to framers as alison.craig at ultrasonix.com.
>
> Send list messages to framers at lists.frameusers.com.
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> To unsubscribe send a blank email to
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DPI Recommendation for Images

[Alan T Litchfield]

My immediate reaction was, read the archives. This topic has been  
rehashed many, many times in the past years.

However, upon reflection the proposals beg a question (from me  
anyway). Why do you think you ought to be able to dictate what level  
of zoom the reader will be using in whatever pdf reading software they  
are using? The considerations posed by Shane a pertinent and are  
strengthened with the concept of the pdf being a multi-platform/device  
file format.

There is no value that I see in trying to dictate to the reader what  
they will see at any specified zoom. The reader will decide what is  
`good enough' for their viewing pleasure.

You build the file according to whatever standards you consider  
appropriate. You can't really do any more than that.

Cheers
Alan

On 23/03/2011, at 7:28 AM, Shane Taylor wrote:

> Also consider whether your audience will be viewing the PDF on a  
> Windows, Mac, Linux, or UNIX machine, because the zoom level to  
> match monitor pixels will vary based on the system DPI setting (and  
> possibly the PDF viewer).
>
> Since we couldn't provide a consistently optimal viewing experience  
> for users across platforms, we decided to use 150 DPI because that  
> provides good print output (as a factor of most printer DPI  
> capabilities).
>
> Shane Taylor
>
>
>
> On Mar 22, 2011, at 1:13 PM, Joseph Lorenzini wrote:
>
>> Hi all,
>>
>> I'd like to get people's opinion on what they think is the best  
>> choice for DPI. Right now I import images into FrameMaker at a DPI  
>> of 144. This means that the PDF must be zoomed to 150% if the image  
>> pixels are to match the monitor pixels (i.e. it would be like  
>> zooming it to 100%).  However, I set the default zoom in the PDFs  
>> to 125% because I thought that 150% was just too big and  
>> overwhelming in a PDF. This means that the images look degraded.  
>> I'd like to improve this.
>>
>> As I see it, I have two options.
>>
>> (1) In FrameMaker, I could change each image's DPI to 120. This  
>> means that the image would NOT look degraded in a PDF at a zoom  
>> level of 125%. The drawbacks are two fold: 1) I have an enormous  
>> amount of documentation and it would take a considerable amount of  
>> time changing the DPIs for each image though I suspect there may be  
>> a plugin out there that could automate this process for each book.  
>> 2) Images would be noticeably bigger and take up more space in the  
>> documentation.
>>
>> (2) I could set the default zoom in the PDFs to 150%. The upside to  
>> this is that its a very trivial change. The downside is that the  
>> PDFs would be enormous. On a monitor resolution of 1200x1600 it  
>> looks big but ok, whereas on 1024x768 I find it to be too large to  
>> be readable. Admittedly, I am assuming that most users in a  
>> corporate environment would have monitors with a maximum resolution  
>> of 1200x1600 but I don't know for sure.  Plus, not everyone likes a  
>> res that high.
>>
>> So what say you all? Which option do you favor and why? And of  
>> course, if there's another option I haven't thought please let me  
>> know.
>>
>> Thanks,
>> Joe

--
Alan T Litchfield
AlphaByte
PO Box 1941, Auckland, 1140
New Zealand
http://www.alphabyte.co.nz
http://www.alphabyte.co.nz/beatrice

Re: DPI Recommendation for Images

[Shane Taylor]

Also consider whether your audience will be viewing the PDF on a Windows, Mac, 
Linux, or UNIX machine, because the zoom level to match monitor pixels will 
vary based on the system DPI setting (and possibly the PDF viewer).

Since we couldn't provide a consistently optimal viewing experience for users 
across platforms, we decided to use 150 DPI because that provides good print 
output (as a factor of most printer DPI capabilities).

Shane Taylor



On Mar 22, 2011, at 1:13 PM, Joseph Lorenzini wrote:

 Hi all,
 
 I'd like to get people's opinion on what they think is the best choice for 
 DPI. Right now I import images into FrameMaker at a DPI of 144. This means 
 that the PDF must be zoomed to 150% if the image pixels are to match the 
 monitor pixels (i.e. it would be like zooming it to 100%).  However, I set 
 the default zoom in the PDFs to 125% because I thought that 150% was just too 
 big and overwhelming in a PDF. This means that the images look degraded. I'd 
 like to improve this. 
 
 As I see it, I have two options.
 
 (1) In FrameMaker, I could change each image's DPI to 120. This means that 
 the image would NOT look degraded in a PDF at a zoom level of 125%. The 
 drawbacks are two fold: 1) I have an enormous amount of documentation and it 
 would take a considerable amount of time changing the DPIs for each image 
 though I suspect there may be a plugin out there that could automate this 
 process for each book. 2) Images would be noticeably bigger and take up more 
 space in the documentation. 
 
 (2) I could set the default zoom in the PDFs to 150%. The upside to this is 
 that its a very trivial change. The downside is that the PDFs would be 
 enormous. On a monitor resolution of 1200x1600 it looks big but ok, whereas 
 on 1024x768 I find it to be too large to be readable. Admittedly, I am 
 assuming that most users in a corporate environment would have monitors with 
 a maximum resolution of 1200x1600 but I don't know for sure.  Plus, not 
 everyone likes a res that high. 
 
 So what say you all? Which option do you favor and why? And of course, if 
 there's another option I haven't thought please let me know.
 
 Thanks,
 Joe 
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Re: DPI Recommendation for Images

[Alan T Litchfield]

My immediate reaction was, read the archives. This topic has been  
rehashed many, many times in the past years.


However, upon reflection the proposals beg a question (from me  
anyway). Why do you think you ought to be able to dictate what level  
of zoom the reader will be using in whatever pdf reading software they  
are using? The considerations posed by Shane a pertinent and are  
strengthened with the concept of the pdf being a multi-platform/device  
file format.


There is no value that I see in trying to dictate to the reader what  
they will see at any specified zoom. The reader will decide what is  
`good enough' for their viewing pleasure.


You build the file according to whatever standards you consider  
appropriate. You can't really do any more than that.


Cheers
Alan

On 23/03/2011, at 7:28 AM, Shane Taylor wrote:

Also consider whether your audience will be viewing the PDF on a  
Windows, Mac, Linux, or UNIX machine, because the zoom level to  
match monitor pixels will vary based on the system DPI setting (and  
possibly the PDF viewer).


Since we couldn't provide a consistently optimal viewing experience  
for users across platforms, we decided to use 150 DPI because that  
provides good print output (as a factor of most printer DPI  
capabilities).


Shane Taylor



On Mar 22, 2011, at 1:13 PM, Joseph Lorenzini wrote:


Hi all,

I'd like to get people's opinion on what they think is the best  
choice for DPI. Right now I import images into FrameMaker at a DPI  
of 144. This means that the PDF must be zoomed to 150% if the image  
pixels are to match the monitor pixels (i.e. it would be like  
zooming it to 100%).  However, I set the default zoom in the PDFs  
to 125% because I thought that 150% was just too big and  
overwhelming in a PDF. This means that the images look degraded.  
I'd like to improve this.


As I see it, I have two options.

(1) In FrameMaker, I could change each image's DPI to 120. This  
means that the image would NOT look degraded in a PDF at a zoom  
level of 125%. The drawbacks are two fold: 1) I have an enormous  
amount of documentation and it would take a considerable amount of  
time changing the DPIs for each image though I suspect there may be  
a plugin out there that could automate this process for each book.  
2) Images would be noticeably bigger and take up more space in the  
documentation.


(2) I could set the default zoom in the PDFs to 150%. The upside to  
this is that its a very trivial change. The downside is that the  
PDFs would be enormous. On a monitor resolution of 1200x1600 it  
looks big but ok, whereas on 1024x768 I find it to be too large to  
be readable. Admittedly, I am assuming that most users in a  
corporate environment would have monitors with a maximum resolution  
of 1200x1600 but I don't know for sure.  Plus, not everyone likes a  
res that high.


So what say you all? Which option do you favor and why? And of  
course, if there's another option I haven't thought please let me  
know.


Thanks,
Joe


--
Alan T Litchfield
AlphaByte
PO Box 1941, Auckland, 1140
New Zealand
http://www.alphabyte.co.nz
http://www.alphabyte.co.nz/beatrice

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DPI Recommendation for Images

[Joseph Lorenzini]

Hi all,

I'd like to get people's opinion on what they think is the best choice for
DPI. Right now I import images into FrameMaker at a DPI of 144. This means
that the PDF must be zoomed to 150% if the image pixels are to match the
monitor pixels (i.e. it would be like zooming it to 100%).  However, I set
the default zoom in the PDFs to 125% because I thought that 150% was just
too big and overwhelming in a PDF. This means that the images look degraded.
I'd like to improve this.

As I see it, I have two options.

(1) In FrameMaker, I could change each image's DPI to 120. This means that
the image would NOT look degraded in a PDF at a zoom level of 125%. The
drawbacks are two fold: 1) I have an enormous amount of documentation and it
would take a considerable amount of time changing the DPIs for each image
though I suspect there may be a plugin out there that could automate this
process for each book. 2) Images would be noticeably bigger and take up more
space in the documentation.

(2) I could set the default zoom in the PDFs to 150%. The upside to this is
that its a very trivial change. The downside is that the PDFs would be
enormous. On a monitor resolution of 1200x1600 it looks big but ok, whereas
on 1024x768 I find it to be too large to be readable. Admittedly, I am
assuming that most users in a corporate environment would have monitors with
a maximum resolution of 1200x1600 but I don't know for sure.  Plus, not
everyone likes a res that high.

So what say you all? Which option do you favor and why? And of course, if
there's another option I haven't thought please let me know.

Thanks,
Joe
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DPI Recommendation for Images

[Joseph Lorenzini]

Hi all,

I'd like to get people's opinion on what they think is the best choice for
DPI. Right now I import images into FrameMaker at a DPI of 144. This means
that the PDF must be zoomed to 150% if the image pixels are to match the
monitor pixels (i.e. it would be like zooming it to 100%).  However, I set
the default zoom in the PDFs to 125% because I thought that 150% was just
too big and overwhelming in a PDF. This means that the images look degraded.
I'd like to improve this.

As I see it, I have two options.

(1) In FrameMaker, I could change each image's DPI to 120. This means that
the image would NOT look degraded in a PDF at a zoom level of 125%. The
drawbacks are two fold: 1) I have an enormous amount of documentation and it
would take a considerable amount of time changing the DPIs for each image
though I suspect there may be a plugin out there that could automate this
process for each book. 2) Images would be noticeably bigger and take up more
space in the documentation.

(2) I could set the default zoom in the PDFs to 150%. The upside to this is
that its a very trivial change. The downside is that the PDFs would be
enormous. On a monitor resolution of 1200x1600 it looks big but ok, whereas
on 1024x768 I find it to be too large to be readable. Admittedly, I am
assuming that most users in a corporate environment would have monitors with
a maximum resolution of 1200x1600 but I don't know for sure.  Plus, not
everyone likes a res that high.

So what say you all? Which option do you favor and why? And of course, if
there's another option I haven't thought please let me know.

Thanks,
Joe
-- next part --
An HTML attachment was scrubbed...
URL: 

DPI Recommendation for Images

[Shane Taylor]

Also consider whether your audience will be viewing the PDF on a Windows, Mac, 
Linux, or UNIX machine, because the zoom level to match monitor pixels will 
vary based on the system DPI setting (and possibly the PDF viewer).

Since we couldn't provide a consistently optimal viewing experience for users 
across platforms, we decided to use 150 DPI because that provides good print 
output (as a factor of most printer DPI capabilities).

Shane Taylor



On Mar 22, 2011, at 1:13 PM, Joseph Lorenzini wrote:

> Hi all,
> 
> I'd like to get people's opinion on what they think is the best choice for 
> DPI. Right now I import images into FrameMaker at a DPI of 144. This means 
> that the PDF must be zoomed to 150% if the image pixels are to match the 
> monitor pixels (i.e. it would be like zooming it to 100%).  However, I set 
> the default zoom in the PDFs to 125% because I thought that 150% was just too 
> big and overwhelming in a PDF. This means that the images look degraded. I'd 
> like to improve this. 
> 
> As I see it, I have two options.
> 
> (1) In FrameMaker, I could change each image's DPI to 120. This means that 
> the image would NOT look degraded in a PDF at a zoom level of 125%. The 
> drawbacks are two fold: 1) I have an enormous amount of documentation and it 
> would take a considerable amount of time changing the DPIs for each image 
> though I suspect there may be a plugin out there that could automate this 
> process for each book. 2) Images would be noticeably bigger and take up more 
> space in the documentation. 
> 
> (2) I could set the default zoom in the PDFs to 150%. The upside to this is 
> that its a very trivial change. The downside is that the PDFs would be 
> enormous. On a monitor resolution of 1200x1600 it looks big but ok, whereas 
> on 1024x768 I find it to be too large to be readable. Admittedly, I am 
> assuming that most users in a corporate environment would have monitors with 
> a maximum resolution of 1200x1600 but I don't know for sure.  Plus, not 
> everyone likes a res that high. 
> 
> So what say you all? Which option do you favor and why? And of course, if 
> there's another option I haven't thought please let me know.
> 
> Thanks,
> Joe 
> ___
> 
> 
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