DPI and Resolution

Does changing the DPI in Windows 7 automatically change the resolution?

[Double-posted|http://forum.java.sun.com/thread.jspa?threadID=5311597&tstart=0].
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Similar Messages

APPLEWORKS PAINT DPI AND RESOLUTION / IMAGE SIZE

I am struggling to make a 10" x 10" design in appleworks paint using at least 288 DPI. But the max resolution is 2000 pixels x 2000 pixels. This gives me a tiny square, not 10" x 10". The print shop I want to submit to dictates the size (10 x 10) and wants at least 200 DPI. Is there not some way for me to choose a DPI other than 72, 144, 288, 300 or 360??? I love appleworks paint but this is frustrating.
I did a 7.5" x 9" design, using 144 DPI @ 1010 x 1300 pixels and it SEEMED to come out fine, but they want higher DPI, and when it was opened as PNG (in an email) it turned out huge.
What am I doing WRONG?

Hi,
Give this a try and see if this works.
1. Create a custom page size 11x11 using page setup. The extra inch gives you some play with the margins.
2. Create a drawing document then under the Format menu select the Show ruler command.
3. Create a paint frame. Activate the paint frame and change the resolution to 288 dpi.
4. Resize the paint frame to 10x10 by dragging using the frames handles and using the ruler as a guide.
5. When you have completed the drawing save it as a pdf instead of jpg. If you save it as a jpg the resolution will revert to 72 dpi. If you save is pdf, the paint resolution should be maintained at 288 dpi. To save it as pdf use the print command and use the save pdf under the pdf button. Most print shops should be able to handle pdf.
Hope this helps.

Image DPI and resolution

Hi all,
I need to set the resolusion and dpi of an image with text,
because i need to print it in a A4 and it has to be with high quality.
Thanks!

[Double-posted|http://forum.java.sun.com/thread.jspa?threadID=5311597&tstart=0].
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BUG: Adding guide randomly changes resolution to 4,000+ dpi and width to 1.111"(CS4)

Bizarre bug, wondering if anyone has encountered this and if anyone please has any insight.
Upgraded to CS4 about a month ago, and in the last few weeks have discovered a major bug. I'm working in some 300 dpi files, and was confounded when I realized several of them were suddenly over 4,000 dpi and had all been rescaled to 1.111" wide.
Just now, I discovered when: I was dragging in a guide, when all of a sudden I noticed the ruler on the side jumped in, and the file was now 1.111". I was unable to undo it, as previous steps stayed at the same scale. Also, it doesn't happen every time I drag in a guide, just randomly. And it doesn't seem to happen in every file either.
I've found that if I divide the resolution by 300 and then multiply the width by the result, the file returns to its proper dimensions. Still, this is totally bizarre behavior.
Please help me!
Mac Pro Dual 2.66 Xeon
5GB RAM
OS X 10.6.2
Photoshop CS4 11.0

Bob LLama wrote:
OS X 10.6.2
Photoshop CS4 11.0
The current version of Photoshop is 11.0.1. You need to update your copy ASAP.
Your OS is also out of date. Update to 10.6.3 by applying the Combo 10.6.3 update rather than the incremental update performed by Software Update.
Download the combo update here:
http://support.apple.com/kb/DL1017
and apply it manually.

How to view resolution (ppi/dpi) and bit depth of an image

Hello,
how can I check the native resolution (ppi/dpi) and bit depth of my image files (jpeg, dng and pef)?
If it is not possible in lighroom, is there a free app for Mac that makes this possible?
Thank you in advance!

I have used several different cameras, which probably have different native bit depths. I assume that Lr converts all RAW files to 16 bits, but the original/native bit depth still affects the quality, right? Therefore, it would be nice to be able to check the native bit depth of an image and e.g. compare it to an image with a different native bit depth.....
I know a little bit of detective work would solve the issue, but it
would be more convenient to be able to view native bit depth in
Lightroom, especially when dealing with multiple cameras, some of which
might have the option to use different bit depths, which would make the
matter significantly harder.
This
issue is certainly not critical and doesn't fit into my actual
workflow. As I stated in a previous post, I am simply curious and wan't
to learn, and I believe that being able to compare images with different
bit depths conveniently would be beneficial to my learning process.
Anyway,
I was simply checking if somebody happened to know a way to view bit
depth in Lr4, but I take it that it is not possible, and I can certainly
live with that.
Check the specifications of your camera to know at what bit depth it writes Raw files. If you have a camera in which the Raw bit depth can be changed the setting will probably be recorded in a section of the metadata called the Maker Notes (I don't believe the EXIF standard includes a field for this information). At any rate, LR displays only a small percentage of the EXIF data (only the most relevant fields) and none of the Maker Notes. To see a fuller elucidation of the metadata you will need a comprehensive EXIF reader like ExifTool.
However, the choices nowadays are usually 12 bit or 14 bit. I can assure you that you cannot visually see any difference between them, because both depths provide a multiplicity of possible tonal levels that is far beyond the limits of human vision - 4,096 levels for 12 bit and 16,384 for 14 bit. Even an 8 bit image with its (seemingly) paltry 256 possible levels is beyond the roughly 200 levels the eye can perceive. And as has been said, LR's internal calculations are done to 16 bit precision no matter what the input depth (although your monitor is probably not displaying the previews at more than 8 bit depth) and at export the RGB image can be written to a tiff or psd in 16 bit notation. The greater depth of 14 bit Raws can possibly (although not necessarily) act as a vehicle for greater DR which might be discerned as less noise in the darkest shadows, but this is not guaranteed and applies to only a few cameras.

How can I view resolution in DPI and not PPI?

Hi all,
Under Bridge>view content as list, I got a column of Resolution but the mesurement are ppi and not dpi and i need to see the dpi.
Anyone knows where can i set it?
thanks..
shlomit

Shlomit,
Strictly speaking, images do not have dpi (ever), only ppi. Images are made of pixels, not dots.
Dpi refers to prints.
However, in everyday use, the terms are loosely used interchangeably. They work out to exactly the same thing (same numbers), but ppi is the correct terminlogy.
See: http://www.scantips.com/basics01.html
DPI, PPI, SPI - What's in a name?
Printer ink dots and image pixels are very different concepts, but both use the term dpi in their own way (dots per inch).
Inkjet printer dpi ratings refer to printer ink dots (the four colors of ink), which is NOT AT ALL the same thing as image pixels. These are such different concepts that some people think we should reserve the term dpi for those inkjet ink dots, and reserve use of ppi only for image pixels. Not a bad plan, except that this view fails to recognize real world usage.
We may hear scanning resolution called spi (Samples Per Inch), and that is indeed what it is. We often hear image resolution called ppi (Pixels Per Inch), and that is indeed what it is. The spi and ppi terms are correct. But historical and common usage has always said dpi for image resolution, meaning pixels per inch, and fully interchangeable with ppi. Pixels are conceptually a kind of colored dot too, and resolution has always been called dpi, for years before we had inkjet printers. Dpi is just jargon perhaps, but it is a fact of life. Scanners and scanner ratings say dpi too, meaning pixels per inch (see dialog pictures here, here, here, and here). I habitually always say dpi myself, but I did try to switch to ppi in the book version.
We may use the term of our own preference, but we need to understand it both ways. Some photo editor programs have switched to saying ppi now, which has much to be said for it. But others have not switched, so insisting on conformity for others to only say ppi will necessarily encounter much frustration, because the real world simply isn't that way, and obviously is not ready to switch yet.
My point here is that we must understand it both ways, because we will see it both ways, often, in the real world.
It's easy, not a problem - the idea of printing digital images is always about pixels per inch, so when the context pertains to images instead of printers, all of these terms, spi, ppi, and dpi, are exactly the same equivalent concept - they all mean pixels per inch.
There is no problem understanding any use of dpi if you know the context. It always means the only thing it can possibly mean. If the context pertains to images or printing pixels, dpi means "pixels per inch". If the context pertains to inkjet printer ratings, dpi means "ink dots per inch". There is no other meaning possible. This should be clear and no big deal - the English language is full of multiple context definitions.

Image size and resolution question.

Is an image at W 48.667 x H 32.444 inches at 72 res the same as an image that I could convert in photoshop to 300 res and then the with "Resample Image" clicked off would be W 11.68 x H 7.78 at 300 res for printing purposes? I'm asking this questions because after exporting 200 images from Lightroom 1.4, putting them into an wedding album I realized the images were not at 300 res but the first size listed above. I'm trying not to have to rebatch and have to put them back into the album. I sent the question to NAPP and got this back"
"If you do the math you'll see that the answer is "no."
48x72=3456 pixels; 32x72=2304 pixels
11.68x300=3504 pixels; 7.78x300=2334 pixels."
I did the math and it comes up to 5760 vs 5830. Pretty darn close. So would an image printed out with both settings print the about the same quality or am I missing something?
Thanks
Bob

Bob's question is a common one. And one of the first that most of us struggled to understand. Let's see if I can shed some light to help clarify the matter.
o The image starts out with a given number of pixels from the camera, scanner, or whatever was its source. The resolution only matters when it comes time to print the image.
72 dpi was once a common resolution for displaying on a computer monitor. Today 90 dpi is more common monitor resolution.
o Let's assume that the image is 3504 x 2336 pixels (which I got from his size @ 72 dpi).
o In "image size", if you do _not_ have 'resample image' checked, all you are doing is _rescaling the image. The image resolution is whatever you enter ...
For example, if you enter 360 dpi -- the native printing resolution of many Epson printers -- you get a print size of 9.733 x 6.489 inches
o Let's say you want to print this image at 360 dpi in portrait on 13 x 19 inch paper with a one inch border on the sides. That would make the short dimension of the image 11 inches and the long would work out to 16.5.
To do that you need to _resample_ the image to change the size. More pixels will be made. The resolution stays at 360 dpi. So check the 'resample image' box.
After resampling to get the print size and resolution you want, the pixel dimension goes to 5960 x 3960 (from 3504 x 2336). Those new pixels came at a price, but that is a matter for another thread and a lot of personal bias.
Hope that helped.
P.S. The answer to your question, Bob, is yes. With resample off in PhotoShop, your original images should have gone to 11.68 x 7.787 inches @300 dpi.
In looking at the rest of your original post, it seems that the export didn't work the way that you wanted. Do I read right that the images turned out to be 11.68 x 7.787 @ 72 dpi? Can't help with that as I don't do Lightroom.

File size and resolution.

Hello,
I have been attempting to create PDF files using Acrobat (both 9.5.5 and 10.1.9) but have run into some questions for which I haven't found clear answers.
I started with pages scanned at 300 dpi and saved as TIFF files. Following that I have tried to bring these into Acrobat using various methods. I have imported them as TIFF and have also compressed them first in Photoshop (reduced resolution to 200 dpi and used 'Saved As' and 'Save for Web') and saved files as JPEG. In all instances I have found a reasonable reduction in the file resolution. For instance, one document had pages saved as TIFF files with a resolution of 1800 x 2700 dpi but the resolution was reduced to only 432 x 648 once it was saved as a PDF file (resolution is shown by the 'Get Info' command in OS X).
Considering the entire page is treated as a huge image file (whether TIFF or JPEG) since it is a scan, how can I control the resolution when creating PDFs so that it doesn't get reduced this much ? I wish to create a PDF that can be viewed on screen and it is not too big to be downloaded by those with slow Internet connections, but at the same time has enough quality to be printed and produce good quality documents.
Thank you in advance.

Hi Bill and thank you for your answer.
I dragged the first TIFF file onto the Acrobat icon which opened it and then dragged the others onto my acrobat screen and positioned them in proper sequence. After that I used the 'Save As' command so that the file would be saved without any type of compression or optimization (I am not sure if I did this right and if this is how Acrobat works). After that I looked at the file using Apple's OS X 'Get Info' command and the pop window with information on the file showed a file size of 432 x 648. How did this file go from a resolution of 300 dpi or a size of 1800 x 2700 pixels to just 432 x 648 ? I am not understanding how Acrobat works and how it processes PDF files.
Considering the files had 300 dpi and the optimizer had a downsampling of 150 dpi (before I changed it) and 200 dpi (after I changed it) the file size should have changed to 900 x 1350 pixels (at 150 dpi) and/or 1200 x 1800 pixels (at 200 dpi). No ?
Two more questions:
1. I don't know how exactly to use the preflight function you mentioned. How does it work ?
2. When you say I should export images to check their resolution, since my pages were scanned and saved as 300 dpi TIFF files wouldn't an entire page be considered as an image file ? Wouldn't the export command see the entire page as an image ?
Can you help me understand this ? I am confused.
Thank you in advance,
Joe.

How to control Color Mode and Resolution for brochure creation?

Hello guys,
I am trying to find some settings within Pages, where I could set CMYK color mode and 300 dpi resolution for my pdf file.
I am creating brochure from scratch, using blank document, because non of brochure templates work for what I need. But I can't find any controls for color mode and resolution set up.
Is there any solution for this?

There has been a lot of discussion in the Pages forum about resolution and some on CMYK.
Much of the discussion has been incorrect.
For the colour handling there is the colour palette
The Apple Colour Palette is the user interface for colour managing vector objects created in Apple Pages such as rules and panels and for colour managing one class of vector objects not created in Apple Pages, namely typographic objects.
Imported objects maintain their colourant model and colour space, if there is one. If there is none, a colour space is assigned and the assigned colour space is saved out into the PDF, opposite e.g. Adobe Photoshop which will colour manage the object in the open editing session, but will then save out the object to disk without the assigned ICC profile if 'Colour Management: Off' is configured.
Therefore, if the imported object is data space CMYK and the colour space device CMYK, the system will assign the Generic CMYK Profile which is equivalent to ANSI CGATS TR001 colourimetry (US SWOP); if the imported object is data space RGB and the colour space is device RGB, the system will assign the Generic RGB Profile which is equivalent to sRGB colourimetry in OS X 10.5 and higher.
In general, always capture and then convert for correction in one of two data spaces with three channels, either ICC colour managed RGB or ICC CIELa*b D50. Then convert to CMYK1, CMYK2, CMYK3, CMYKn from the ICC colour space chosen for correction and archiving. This colour space should be large enough to hold any colours that the output colour spaces can hold.
The Apple ColorSync Utility has a gamut comparison dialogue which is 3D (point, press, and turn the 3D gamut comparison). Use this facility to pick an ICC colour space of reasonable size and shape for correction and conversion into final output. Don't pick sRGB as a quick look will show that it can't hold as input what ISO reference offset can hold as output for pure cyan, let alone hold what a big inkjet can hold in greens, blues, reds and yellows.
The ICC architecture lets the ICC profile for the printed output match out of gamut colours to in gamut colours using the Perceptual rendering intent, as intended in the original architecture from 1995. Adobe internally introduced an inhouse conversion for compatibility with PostScript and as default for PDF, Relative Colorimetric with Adobe Black Point Compension. Relative Colorimetric is in fact a proofing transform, without gamut mapping. Black Point Compensation is a simple linear scaling of the lightness to compensate for the fact that the shadows will be clipped in a Relative Colorimetric conversion.
The other problem is transparency, introduced in the QuickDraw Graphics Extension for Mac OS 7.5. Transparency is not supported in any version of Adobe PostScript (level 1, level 2 or level 3). Transparency is also not supported in any version of Adobe PDF prior to version 1.4 and higher. Therefore, unless the RIP Raster Image Processor is able to accept PDF 1.4 and higher, transparency has to be rendered / flattened which is done in the PDF/X-3 filter of the Apple ColorSync Utility.
The idea in the PDF/X-3 filter (for Adobe PDF 1.3) is that the everyday enduser, after placing ICC colour managed RGB or CIE La*b D50 objects, and after choosing an ICC colour space for objects created in Pages, chooses the ICC colour space for the output condition. The filter accepts both ICC profiles of type MNTR Monitor with data space RGB, ICC profiles of type PRTR Printer with data space RGB, and ICC profiles of type PRTR Printer with data sapce CMYK.
The colourant conversion (RGB to CMYK) and the gamut mapping (out of gamut colours in input colour spaces mapped to in gamut colours in output colour space) is then calculated as per the ICC profile for the output condition. An output condition is the combination of factors that affect how colour is formed: the colour lightness and colour tint of the paper, the colours of the colourants, and the tone value increase. Think of gamut mapping in a good ICC profile as Format 1 kerning in a TrueType font (where your font has state-based kerning for up to 8 glyphs simultaneously).
Below a link to a discussion of how to change the default PDF/X-3 filter the Apple ColorSync Utility. "Wegen diverser Fehler im Mac OS X empfiehlt es sich, wo immer möglich, die PDFs ohne Transparenzreduktion (also auf normalem Weg) über den Befehl Als PDF sichern zu erstellen und das Flattening der Druckerei zu überlassen," that is, pick the plain save as PDF path and leave the transparency flattening to the prepress technician.
Henrik
Reference:
http://www.icalamus.net/tutorials/howtocreatepdfx.php

Halftones and resolution settings - why and reasons?

I am taking continuous tone images, color and B&W, converting to greyscale then halftone dots so that the images will print better via desktop laser printer of some dpi value output.
Photoshop applies a Bitmap resolution, then asks for and 'Output' resolution.
The dot style menu then asks for a dot resolution value.
I understand that the smaller dpi produces a more contrasty, newspaper type image. Conversley, a higher dpi will allow for a better gradation of tonality, but may block up depending on the reproduction method.
Do these two resolution values correlate?
Are you resampling the Bitmap resolution when you input a different value?
Will a higher Bitmap resolution provide greater tonal range if using a higher dpi?
Since the printer output will define how well a particular dot will be built up during printing, is there a relationship or method for entering dpi values that will provide a good output?
Thanks, Leadmann12

Can't you control DPI and LPI in the printer settings without destroying the image in Photoshop? You are making Photoshop do something it should not need to do.
The difference that you observe in newspaper images relates to lower LPI, not necessarily a change in DPI.
http://en.wikipedia.org/wiki/Lines_per_inch

Circular and oval cropping at set size and resolution?

I know how to use the M tool to create circles and ovals and i know you can set that to certain dimensions, but that doesn't do everything I need.
How do you crop circles and ovals out of a photo, at a set size (for example, a 1 inch circle ) at a set resolution for printing? What I need to do is crop circular and oval images out of a photo, say at 250 dpi, then paste them onto a blank white page for printing.
So if I've got let's say a photo that's 14x10 inches at 300dpi, I want to be able to go in, crop out an oval or circle, with as much or as little of the photo that I can or want to, setting that automatically to a certain dimension and dpi, then paste it into a blank white page I've already created at that same d
When finished I'd have maybe 20 or 30 images on a page that I can flatten all the layers and print.
I can't find a way to set size and resolution with anything other than the regular square crop tool.

You can make an action and use it as one step automation to achieve that on an initial selection.
Step by step instructions:
With the Elliptical Marquee Tool, make the desired selection on a image.
Open the Actions panel (Window > Actions (Alt+F9), from its menu at the top right or corresponding buttons at the bottom, choose New Action, and in the dialog that appears press the Record button.
From the Image menu, choose Crop.
From the Selection menu, choose Inverse (Ctrl+Shift+I)
Press the d key on your keyboard to reset the foreground/background color swatches.
Press Ctrl + Delete keys on your keyboard to fill with white.
From the Image menu, choose Image Size (Ctrl+Alt+I), make sure the Resample Image is checked, and in the Document Size section enter the desired dimensions and resolution and press OK.
In the Actions Panel press the Stop Recording button.
Now you can copy or drag the image to another image.
For the next image make the oval selection, go to the Actions panel, select the actions you created above, and press the play button. You can also create a keyboard shortcut in the action's property accessible by double clicking the action.
The creation of this action assumes that in the final image you will be composing oval images on white background without overlapping their rectangular bounding boxes. If you plan to overlap them then the action must be modified to make the image a transparent layer and delete outside the oval instead of filling with white.

72 dpi and 300 dpi

Is it the same image quality if I were to design an image in photoshop CS3 at 72 dpi and then change the size to 300 dpi for printing, as designing the image at 300 dpi right away?
If not, does anyone know the percentage I can set my workspace so that it would represent the original size?
I am designing a postcard at 6x4 and when its 300 dpi it is obviously huge on my screen and I would like to see it as the original size so that I can have an idea of how it looks.

First of all on the screen it is pixels (ppi) not dpi.
Having got this out of the way, a quick way to see print size it to select the Zoom tool and pick the appropriate button in the Options bar at the top.
For some basic information on resolution and printing go to www.scantips.com and browse through the articles. (It's not all bout scanning!)
..and of course there is the excellent article at http://www.peachpit.com/articles/article.aspx?p=1332854

I need to submit 2 photos Image and resolution

I need to submit 2 photos
Image and resolution & size : 4" x 6" @ 300 dpi ( how do I do this from iphoto)
Is there a way to upload these so you both can see them and then we can pick out 2 from 354 pictures
I have to complete by May 4th

300 dpi is 300 Dots Per Inch
So by simple math 4x6" at 300 dpi is 1200 pixels by 1800 pixels
To do this in iPhoto your photo must be that size or larger. Crop to 4x6 and export with a custom size with the maximum dimension being 1800 pixels.
LN

Messed up color display and resolution because of mini-DVI to video adapter

Once I connected the mini-DVI to video adapter to the tv and got weird colors on my screen for a while but then it worked out, then after a while I disconnected the cable and turned my computer off. After that, everytime I turned my macbook on, the color is fine for two seconds and then it turns into a weird offset color, really bright colors, kinda sketchy and just a few colors, and a weird resolution and display obviously, but then I just connect my Mini-DVI to video adapter and disconnect it again (quickly) and the color returns to normal. How can I make the normal colors stay and not have to connect the mini-DVI to video adapater everytime I want to see the normal color display and resolution??
please help!

Open the Universal Access pane of System Preferences, click on Seeing, turn off the White on Black, VoiceOver, and Zoom options, and drag the Contrast slider all the way to the left. If the issue persists, create a new folder on the desktop, drag half of the items from the Library/Preferences/ folder of the item in the Finder's sidebar with the house icon into it, and narrow down the files until you've isolated the one responsible.
(30807)

Firefox mage quality and resolution was superb when I used XP and Vista. Now that I have Windows 7, however (with the Firefox 3.6.3 version), the image quality and resolution is poor. Please help me!

I am using the Firefox 3.6.3 version with my new Windows 7 operating system. When I used all the previous Firefox versions in my XP and Vista operating systems, image quality and resolution was excellent! However, now that I have upgraded to Windows 7 and Firefox 3.6.3, the image quality and resolution is poor (unacceptable for downloading purposes).
== This happened ==
Every time Firefox opened
== I first activated my new computer and installed the Firefox 3.6.3.

All my images are pixelated in firefox 3.6.3
http://www.dcgdcreative.com
Not only on my site but on most sites I view.
The issue is not solved by resetting the zoom text view (ctrl+0)
The issue is not resolved by starting in safemode with add-ons disabled
The problem seems to only affect .jpeg files and only on Windows 7 on my desktop; as I have viewed several sites using windows XP with my laptop, no issues.
I had the same issue with IE8 and was able to fix the problem with by setting up the compatibility view for all sites. Issue fixed no problems at all. But nothing similar for firefox?
Whats the deal?

DPI and Resolution

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