DPI settings

I show my 21 megapixel photos after rendering them in to 1080p movies; I display them on a 1080p plasma TV.. This system works very well, indeed. I have many lower resolution photos saved in JPG that do not have the quality of the hi-resolution TIFF files I currently save. I understand that DPI is only a factor when printing, but I have converted a number of the JPGs to TIFF and increased the DPI and significantly increased the quality of the photos WHEN DISPLAYED ON MY TV. The question is WHY is the quality better? Is it the DPI or the conversion to TIFF?

Your photos do not have DPI (dots per inch). They do have a setting for PPI (pixels per inch), which is a totally meaningless number until such time as you go to print.
My guess is that you up-sized the photo, and PSE interpolated and created a larger photo that had better quality when viewed large. (Never tried that myself) Converting to TIFF will not change the quality of your image (in fact, every single pixel remains the same when you convert a JPG to a TIFF); and also changing the PPI had nothing to do with it.
Exactly (in great detail) what steps do you follow when you “converted a number of the JPGs to TIFF and increased the DPI”?

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Server 2008 SP2 DPI settings

We are running a Windows 2008 Standard SP2 32-bit terminal server. One of the users would like to have the option to change the DPI settings under their session. I found a MS hotfix, but it does not apply to this version (http://support.microsoft.com/kb/2726399)
Does anyone know if there is another hotfix or update planned to address this? We have changed the resolution settings on the client computers, but was curious if anyone had any additional information on whether this may be
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Hi,
I would like to check if you need further assistance.
Thanks.
Jeremy Wu
TechNet Community Support

How do you change the dpi settings in iPhoto

How do you change the dpi settings in iPhoto

Short answer: the dpi is set when you decide what size you're printing at.
Long Answer: Dpi means nothing in the digital world of your computer. There are no "inches" to have "dots per..." Size is measured in pixels. That's the same on your camera. It doesn't take 10 x 8 or 6 x 4 shots. It takes shots measured in megapixels. For instance 4,000 x 3,000 is a 12 megapixel camera.
Using that example, that shot from that camera has 12 million pixels. So that's how many "Dots" there are. To decide the ratio of dots per inch, you now need to decide the "inches" part. And that's printing. Print at 10 x 8 and the dpi will be 4,000/10 or about 400 dpi. At 6 x 4 then it's 4,000/6 or 660 dpi. Work the other way: Print at 300 dpi and the resulting image will be about 13 inches on the longer side.
So, your photo as a fixed number of pixels. Changing the dimensions of the print will vary the dpi, changing the dpi will vary the dimensions of the print.
For more see http://www.rideau-info.com/photos/mythdpi.html
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TD

Xorg DPI settings won't save

Following the wiki, I decided to check if my DPI settings were correct, and fix them if they were not. These are the results I'm getting (full commands typed out for clarity):
First, without any configuration, the screen settings:
$ xinit /usr/bin/awesome -- :0
$ xdpyinfo | grep -B2 resolution
screen #0:
dimensions: 1920x1080 pixels (508x285 millimeters)
resolution: 96x96 dots per inch
This is wrong. Altering the commandline -dpi parameter results in the following:
xinit /usr/bin/awesome -- :0 -dpi 165
$ xdpyinfo | grep -B2 resolution
screen #0:
dimensions: 1920x1080 pixels (295x166 millimeters)
resolution: 165x165 dots per inch
This is right. For a more permanent solution one might alter xorg.conf settings, which I did:
/etc/X11/xorg.conf.d/10-dpi.conf
Section "Monitor"
Identifier "Monitor0"
DisplaySize 295 166
EndSection
However, it results the default 96x96 DPI, as you saw in the first code snippet. Furthermore, directly editing the DPI in xorg.conf such as this:
/etc/X11/xorg.conf.d/10-dpi.conf
Section "Monitor"
Identifier "Monitor0"
Option "DPI" "166 x 166"
EndSection
again results in the default 96x96 DPI.
Interestingly enough, if I deliberately put some bogus values into the config, Xorg complains about it and will not start up. So the config file IS being read, and there are apparently no errors in it. As well the other .conf files in the /etc/X11/xorg.conf.d/ directory is working (such as fonts.conf, which I am using to include /usr/share/font directories).
Why is the config not applying?
Last edited by Whef (2012-09-04 07:10:13)

hellomynameisphil wrote:
I think you can put it in .Xdefaults or .Xresources:
Xft.dpi: 166
If this does infact work, then it didn't for me.
Lone_Wolf wrote:
I looked this up also, and found that Xorg0.log gives different results then xdpyinfo :
$ xdpyinfo | grep -B2 resolution
screen #0:
dimensions: 1920x1200 pixels (508x317 millimeters)
resolution: 96x96 dots per inch
Xorg.0.log
[7232.286] (**) RADEON(0): Display dimensions: (520, 320) mm
[ 7232.286] (**) RADEON(0): DPI set to (93, 95)
No 90-monitor.conf file present, and Xorg.0.log only has 2 other lines with dpi , both about font paths.
So the question seems to be : which is right, Xorg.0.log or xdpyinfo ?
Interesting... The xdpyinfo one is correct (I can tell because of text sizes). However, when starting X without the -dpi argument it shows this:
[ 2194.180] (**) intel(0): DPI set to (174,171)
Not only is this the wrong DPI for my monitor, but it isn't the actual DPI that X is using. xdpyinfo correctly displays that the DPI is 96x96. However, if I launch X with the -dpi argument then Xorg.0.log will report the correct DPI (what I set it to). I really have no idea what's going on. I just wish my DPI settings would save!
Last edited by Whef (2012-09-05 08:47:33)

Recommended DPI settings

Looking for some advice on DPI settings when exporting Nikon D200 RAW images to print photos, books, converting from RAW to JPEG etc.
At what point does it make no difference except file size?
Thanks.
iMac Intel Core Duo 20", 2 GB RAM Mac OS X (10.4.4) Nikon Coolscan V ED, Nikon D200, Iomega MiniMax Drives

DPI is used only to determine how large to print an image. In other words, if you have an image that's 3000 pixels wide and you set it to print at 300 dots per inch, it will print at 10 inches wide. If you have an image that's only 300 pixels wide and you print it at 300 dpi, it would only be 1 inch wide.
That is the only use of DPI. DPI does not determine an image's digital resolution. The number of pixels determines the image's resolution.
Generally speaking, if you're printing an image on paper you're better off with the largest image you can get.
At what point does it make no difference except file
size?
When you are exporting an image to be used in a digital presentation, such as on a web page or on TV, that's when you don't need to worry about DPI. That's when what only matters is the number of pixels in the image.
For example, if you export that image that's 300 pixels wide to display on a computer screen that's 1280 pixels wide, the image will take up about a quarter of the screen. And it doesn't matter at all what DPI setting you might have set.
You can download a PDF file of a chapter from one of my old Photoshop books that explains digital imaging resolution at http://www.seekpeace.com/viz/res/Resolution.pdf.

Changing dpi settings for 7510

I want to change the DPI setting for scanning. I found direction that says it can be changed using the printer software but I cannot find how to do that.

Hi mfkrenson,
Welcome to the HP Forums!
I see that you are wondering how to change the DPI settings for scanning with your HP Photosmart 7510, and I am happy to help you!
For further assistance, I will need to know If you are using a Windows or Mac Operating System, and the version number. To find the exact version, visit this link. Whatsmyos.
Hope to hear back from you, and thank you for posting!
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I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" to say “Thanks” for helping!

Firefox Sync synchronizes DPI settings for Gmail

I set up Firefox Sync on a computer with a large monitor (a TV actuall) and I had to increase the DPI in the Gnome monitor settings in order for text to be readable on the large monitor. Now, using Firefox Sync on a laptop with a much smaller monitor, it appears the DPI settings have been synced for Gmail. Gmail somehow stores this information and Firefox has synced it. Is there a way to avoid this? Perhaps I should ask Google instead?

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Change DPI Settings

Is it possible to let users change the DPI settings on a terminal server running Windows Server 2008 x86 ?
I see some hofixes for 2008R2 but nothing for x86.
nik kumar

Hi Nik,
Thank you for posting in Windows Server Forum.
Regular users (and users in a remote session) can adjust many UI elements individually however, using the "Window Color and Appearance" in the Personalization Control Panel applet. In Windows Server 2008 R2 and Windows 7, the settings are accessed via "Advanced
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More information.
The DPI adjustment is not available in a Remote Session (RDP)
http://support.microsoft.com/kb/2544872
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Good afternoon,
I am under the impression that the default / ONLY DPI setting when saving as the .SVG file format is 72 in all CS# versions of AI, however does AI have the ability to save in any other DPI settings, (72/90/150/300) & if so, how can I use them?
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Xorg.conf DPI settings VS. fonts DPI settings - Confusing!

I honestly have to admit, that I don't get it. Having a ThinkPad T42p with a 1600x1200 LCD with the visible dimensions of 304 x 228 mm, I have set that in xorg.conf ("DisplaySize 304 228"), which results in Xorg setting up 133x133 DPI on start (without specifying this DisplaySize setting, it defaults to 75x75 DPI).
133 DPI results in fonts displayed way too large, although I remember WinXP (which came preinstalled with this laptop) setting 133 DPI as well, which also gave large fonts, but not that large as seen with Xorg.
I am now using KDE (specifically funkyou's KDEMOD), and I have set "Fixed DPI: 96 DPI" in font-settings, which means, text is displayed in a reasonable size with 96 DPI, but Xorg is still set to 133 DPI:
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I really don't understand this font vs. Xorg DPI setting. How does this fit together?
Why are fonts shown way too large at 133 DPI, if that's the correct DPI setting for my screen size & resolution?

Why does it need to scale properly, if Xorg should already have set DPI to the correct value calculated from the display size?
How did you determine, that 100 DPI is the correct fonts-DPI-setting for your display?
This is just weird, because setting the DPI setting for fonts does not influence the DPI setting of the X server (that's what I mentioned above, selected "Fixed DPI: 96" in KDE's font-settings, and xdpyinfo still reports 133 DPI).
Concerning my LCD, 133 DPI seems reasonable for my 15" laptop-display with relatively high native resolution of 1600x1200, so the Xorg setting surely is correct. But why do I then need to set 96 DPI for fonts to be displayed in a proper size?
Even more confusing is, that the settings for the ATI Radeon open-source-driver offer even more options concering DPI:
#Option "MergedDPI" # [<str>]
#Option "ConstantDPI" # [<bool>]
As seen, I have not enabled these, but that makes altogether 4 different settings for influencing DPI.
Fact is, 96 DPI in KDE's fonts-settings seems to lead to the desired result, although that value should not be the proper one for my display-size & resolution, as well as I have no idea, what the X server resolution (133x134 DPI) is all about, especially because it does not seem to be of any importance if font-settings are forced to a different DPI setting (which means, it does not seem to matter, if the X server resolution is set to 75x75, 96x96 or 133x133 DPI, as long as the option for force fonts at 96 DPI is selected in KDE's fonts-settings).

Where do I change the dpi settings for creating a jpg in Bridge CS5?

I upload jpgs to an online site to be viewed in a browser. I've been using Bridge CS5 to batch process the jpgs from high quality pdfs.The settings I see when I do the settings to create the jpgs will only give me Maximum settings and the option to set it on 12 but when I open the jpg that's created in Photoshop, it's still 72. I would like to have at least a 150 dpi setting. I've searched and can't find any help online. What am I doing wrong, or isn't there any place to give me the option to change the settings to a higher dpi in Bridge? If this isn't possible, what do you suggest to make the process go faster? I'm using the Adobe CS5 programs.
Thanks in advance for any help.

"Maximum" and "12" usually refer to compression (influencing image quality and jpeg file size in bytes); and as Curt wrote, dpi is meaningless for display by and viewing in web browsers. (It could be a different matter if you are uploading the jpeg files for someone to download from the web to print.)
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RAW DPI settings going in reverse?

Hello.
I have Bridge and P/S CS3 with the most recent RAW download. If I take a 12MP image into RAW with settings: Abobe 1998, 8 bit, 12MP, 250 DPI. Then open it into P/S, I get an image size of around 17 by 11 inches...
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Shouldn't it be the other way around?!

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Does GetTextExtentPoint32 work with dpi settings above 100%?

I hope I have the right forum.
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string and multiplied that by the average char width in the font structure and ... the size I calculate and the size GetTextExtentPoint32 returns are always the same value when running at 150% (but not at 100%). Is GetTextExtentPoint32 actually measuring the
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R.D. Holland

Mea culpa! The code I was working with was being passed a DC that had no font selected into it! Hence the system used a default font. Once I realized that and selected the font that would eventually be used at display time, I got back good results and
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I'm making a film with a lot of acquired stills at 300 dpi. I need to change the 300dpi to 72dpi. Can iPhoto do this? Or could you suggest a modest application (freeware or inexpensive) that will allow me to do this?
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Yo Kevin,
Perfect suggestion. I have GraphicConverter. Set it up, works fine. One bug: My son is editing a film for me across the continent. I got him to download GraphicConverter. He's got a version a point or two earlier than the one I have. When he resizes the photos - going from 300dpi to 72dpi (while enlarging the actual size) - everything is fine. But! When he brings that new 72dpi version into FinalCutPro and puts it on the timeline, it has to be rendered. My 72dpi versions DON'T need to be rendered. His 300dpi versions DON'T need to be rendered. (We can't use 300dpi versions in FCP because they slow down the system.)
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DPI settings and OCR recognition

I am attempting to make a catalog of ours searchable. But
Adobe keeps throwing an alert that OCR cannot scan the page because
the image resolution is below 72dpi.
I created these PDFs using the Adobe PDF print option via
AutoCAD, with a DPI setting in the print set up of 300dpi. But
Adobe continues to say the DPI setting is below 72. Is there a way
for me to change the DPI setting of an existing PDF, or a better
way to influence the DPI setting of a new PDF? And on top of that,
is there a way to check the DPI setting of a PDF?

If you are using the PDF Maker in AutoCad it should already
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