Effective ppi

Hello All,
My friend and I are working on an art book project being printed on a satin/matt 100lb artpaper.  All images are full bleed 9.75 x 12.5.  Our effective ppi's are ranging from 280 to 400. We were going to downssample them to 300 dpi on export in order to give the printer a document with all the same ppi.  Do I need to upsize the ones that are 285?  Can that be done in InDesign?  I have originals on some of them that are larger if need be.  Would you see the difference?  Is there a reason to give a pdf to a printer with a consistant ppi?  Would they change their lpi within a single job or just print it all at the lower one?
Thanks!

Thanks Bob,
I think it is a pretty high end press.  They do a lot of art books.  Will they reduce the overall lpi for the book because of those few images that aren't 300 ppi?  Or would they still use 150lpi or 200lpi on the whole thing?   Or would they adjust the lpi for each image?

Similar Messages

  • Original and effective ppi

    Hey everyone! I would like to ask for some urgent help on Indesign + PDF print document subject.
    I prepared a document for offset print (business cards 8,5cm width x 5,5cm height) and it turned out that the pictures were very rastered on the Proof. Like, you could see the raster dots on it.
    I checked out my Indesign document again and I found out that the original ppi of the images was 762 and the effective ppi over 1000. I then realised that on Photoshop, I setted by mistake the pictures´s resolution for 300 pixel per cm instead of pixel per inchs!!
    I changed that and they have now:
    300 pixel per inch resolution
    4cm width x 5cm height
    and the pixel dimensions are: 472 px width x 591 pixel (height).
    In the Indesign document, it appears now:
    300 original ppi
    between 300 and 400 effective ppi
    472 px x 591 px dimensions
    My question is, do you guys think I solved the problem that way or should I still change something before I sent it again to print?
    The real dimensions of the pictures on the business card should be about 4cm width x 5cm height, so I decided to have them on Photoshop with that dimensions and 300 pixel per inch resolution, so that I don´t have to scale them much on Indesign. Did I do it right?
    Thank you!

    The original psd file has, more precisely:
    Image size: 14,8 cm width x 21 cm height
    Resolution: 762 px / inch ( = 300px/cm )
    Pixel dimensions: 4440 x 6300
    Then, I changed the Resolution from 762 px / inch to 300 px / inch, and checked in the "resample image" option, which converted the Pixel dimensions into: 1748 x 1418
    (Image size remained the same)
    This file has good detail quality, it looks sharp.
    Then, I drag the layer from this file to a new one, with the image size I need :
    Image size: 4cm x 5cm
    Resolution: 300 px / inch
    Pixel dimensions: 472 x 591
    Which makes me think of another question: Are these Pixel dimensions enough for print? Is this psd file good enough to place in Indesign and for print?

  • Why effective PPI format change?

    Hello there!
    The effective ppi format change to "effective resolution", like 2356x1678px. I want back to real ppi, like 370ppi. How do i get back?

    Since I notice in your screen shot that you have two different images with non-proportional scaling, I might point out that you can use InDesign's Preflight panel to search for such images. In the IMAGES and OBJECTS section of the Preflight Profiles dialog box, check "Non-Proportional Scaling of Placed Object" in your preflight profile.

  • Actual vs Effective PPI

    I see in the info when I click on a specific link in the links panel two items I don't know how to tell them apart.  Can anyone give me a good explanation of the difference between actual and effective ppi.  Which one is important and which one you really need to pay attention to and why.  I understand that a picture needs to be at least 240 ppi for print.  I've read several articles and just don't really understand.

    Actual resolution is the resolution as you would view it in an image editor like Photoshop.
    Effective resolution is the scaled resolution. If you scale the picture smaller in InDesign, you're "squishing" the pixels into a smaller area, increasing the effective resolution. If you scale the picture larger in InDesign, you're spreading the pixels over a larger area, decreasing the effective resolution.

  • Effective ppi, where did you go?

    Help! Since I upgraded from CS2 all the way to CS5 I'm having trouble finding some of my favourite features. I've spent a lot of time looking for the effective ppi information in the info tab.
    The new info tab shows no resolution at all for eps-images. How can I figure out the effective ppi after I scale the images now???

    You could trigger live preflight for showing the effictive resolution of all images (EPS included!) if you use a very low threshold at max. resolution and even more lower value at min. resolution.
    Downside:
    it will slow down your operations tremendously and you have to single out your selected image you want to check…
    Note 1: first edit the minimum resolution, then the maximum resolution field of your new preflight profile.
    Note 2: don't try to set your minimum resolution values higher than your maximum resolution. Might crash your InDesign. In my case it was InDesign CS5.5 (7.5.2) that showed an alert window with an appropriate message and an ok button that I could not cancel even if I hit ok several times. I switched back to my browser to edit this message here and InDesign crashed in the background; (sometimes I try silly things just out of fun ).
    Uwe

  • Effective ppi in photoshop

    Hi ,
    im using psp cs2.
    when placing images in the composition its easy to get lost and to have your images in a low resolution due to transformation. is there a way to see the effective ppi of a layer content? by effective ppi i mean the resolution of an image in perspective to its size.
    Thanks
    S

    Once in the target image the placed item will have the resolution of that image.
    The secret is to check the resolution of the item before adding it to the image.
    If they are not the same, the item will appear to shrink or expand as it adopts the resolution of the target image

  • Can "Actual PPI" and "Effective PPI" be extracted from InDesign?

    A script that I may require, needs to reach inside InDesign and extract the Actual PPI and Effective PPI from certain images, and then process the images in Photoshop. Are those variables available to scripts?

    Update: this applies for javascript, i don't actually know if you in Applescript would use the Open Library function, and then selecting Indesign.?
    With Creative Suite comes a program called Adobe ExtendScript Toolkit (in CS3 and CS4 its ESTK 2).
    Open this program and look under (for CS3) "Help" -> "Adobe Indesign CS3 Object Model" this is the Object Model Viewer, or in short OMV.
    In there you will se all the available objects, methods and so on.
    If f.ex. you will like to know how to get a reference of a image:
    app.activeDocument.pages[0].images[0]; // will give you the first image of page 1 of the currently active document
    In ESTK, click application, now you see all available objects for the app (activeDocument is one of them), click this and you will see that Data-Type is document. Click on the blue link document, now you see what objects are available for a document.
    Have fun.

  • Effective PPI in .eps files

    Anyone know how to extract the effective ppi info in .eps files? Photoshop.eps and Illustrator.eps files are different, so whichever you may have info on would be appreciated. I believe Illustrator generated ones are read as .pdf docs, so it may be impossible.
    Thanks,
    Seth

    absqua wrote:
    Why not use the built-in preflight for this? It will get the effective ppi of Illustrator and Photoshop eps's.
    Uh-oh. Egg on face and all of that.
    I didn't get to see the effective ppi, but if I place this EPS image into InDesign
    I get a preflight message 'something is wrong'. If I make the image smaller (and thus increase the ppi), the error disappears.

  • Applescript: Check Effective ppi of document

    Hi
    I'm creating a script to check if I have any lo-res images in my document, using effective ppi (Yes I know about preflight) and just pop up a message. However I'm stuck on checking the results the following is returning…
    [applescript]
    tell application "Adobe InDesign CS6"
              activate
              tell document 1
                        set minimumRes to 100
                        set theEffectiveRes to {}
                        set theLink to every link
                        repeat with x from 1 to count of theLink
                                  set the end of theEffectiveRes to effective ppi of parent of link x
                        end repeat
                        -- Here I need to check theEffectiveRes for any entires below minimumRes and display a message
              end tell
    end tell
    log theEffectiveRes
    [/applescript]
    many thanks
    Shane

    Here's how I do it in JavaScript/ExtendScript:
    effectivePpi = image.effectivePpi[0];     // grab the horizontal effective resolution
    Regards,
    Stephen

  • Is there a way to export link info (scale %, effective ppi, etc.) to a spreadsheet?

    We have several retail pieces that use the same images multiple times. We upsize the image to the largest scale that is used in multiple layouts and then use that same image in the smaller pieces. We'd like to be able to export the link info from several ID layouts to a spreadsheet to compare images and what scale they are needed. This would save time by having to open several files and manually compare scaling, etc.. Any ideas? Thanks!

    Not mine, but I don't know who wrote it originally.
    Add in your own needs... (i'm still learning JS so I haven't advanced this any further, but I want to add both actual dpi or effective (output size) dpi...)
    app.activeDocument.viewPreferences.rulerOrigin = RulerOrigin.PAGE_ORIGIN;
    list = [];
    imgs = app.activeDocument.allGraphics;
    unitname = getCurrentUnit();
    for (i=0; i<imgs.length; i++)
    h = imgs[i].parent.geometricBounds[2] - imgs[i].parent.geometricBounds[0];
    w = imgs[i].parent.geometricBounds[3] - imgs[i].parent.geometricBounds[1];
    left = imgs[i].parent.geometricBounds[1];
    top = imgs[i].parent.geometricBounds[0];
    scale = roundMe(imgs[i].horizontalScale,1);
    // some fair rounding
    switch (unitname)
      case 'in':
       w = roundMe(w, 3);
       h = roundMe(h, 3);
       left = roundMe(left, 3);
       top = roundMe(top, 3);
       break;
      case 'cm':
       w = roundMe(w, 2);
       h = roundMe(h, 2);
       left = roundMe(left, 2);
       top = roundMe(top, 2);
       break;
      default:
       w = roundMe(w, 1);
       h = roundMe(h, 1);
       left = roundMe(left, 1);
       top = roundMe(top, 1);
    list.push (imgs[i].itemLink.name+'\t'+'('+left+','+top+')'+'\t'+w+' x '+h+' '+unitname+'\t'+scale+'%');
    // alert (list.join('\r')); exit();
    defaultFile = new File (Folder.myDocuments+"/"+app.activeDocument.name.replace(/\.indd$/i, '')+".txt");
    if (File.fs == "Windows")
    writeFile = defaultFile.saveDlg( 'Save report', "Plain text file:*.txt;All files:*.*" );
    else
    writeFile = defaultFile.saveDlg( 'Save report');
    if (writeFile != null)
    if (writeFile.open("w"))
      writeFile.encoding = "utf8";
      writeFile.write (list.join("\r")+"\r");
      writeFile.close();
    function roundMe(val,to)
    var t = 1;
    while (to-- > 0) t *= 10;
    return Math.round(val*t)/t;
    function getCurrentUnit ()
    switch (app.activeDocument.viewPreferences.horizontalMeasurementUnits)
      case MeasurementUnits.POINTS: return "pt";
      case MeasurementUnits.PICAS: return "pt";
      case MeasurementUnits.INCHES: return "in";
      case MeasurementUnits.INCHES_DECIMAL: return "in";
      case MeasurementUnits.MILLIMETERS: return "mm";
      case MeasurementUnits.CENTIMETERS: return "cm";
      case MeasurementUnits.CICEROS: return "c";
      case MeasurementUnits.AGATES: return "ag";
      default: alert ("Oh, come on!"); exit(0);

  • Effective and actual ppi?

    What's the difference between effective and actual ppi? Is there any reason I need to adjust the actual ppi if it's more than 300 x 300 ppi?

    240 effective ppi is probably adequate for almost any commercial printing other than fine art reproduction. 115 could be pushing your luck, but there are so many variables that it's impossible to say anything absolute. What is the intended use and the intended viewing distance? What's the printing method?
    You might want to take a look at http://forums.adobe.com/message/2042202#2042202

  • Placing Images and PPI issues

    Hello, I am new to InDesign.. I am a digital artist who has only used PS in the past, so I'm used to manipulating images however I like concerning PPI, DPI, and pixels. I am now creating an app for ipad use and created the background images for the pages in PS. Now, I'm placing them into ID. When I do that, no matter what I have the file saved as, it converts the image to a different ppi.
    When I created the images in PS, I used the standard ipad resolution (262px) and dimensions. When I created the ID file, I used the standard ipad dimensions and the ppi is obviously much lower, at 72?
    Is there a way to set the ID resolution, or do I need to create my documents with only 72ppi? This doesn't seem like it would give the best image viewing available on the ipad.
    Thank you!

    InDesign respects the original size and resolution of images, as long as you keep them at 100% of the original size. When they are at 100%, the "Actual ppi" and "Effective ppi" fields of the Info panel display the same value. In your specific case, the Info panel needs to show "262" in both fields. If not, it means that the respective image is scaled. To verify its scale, click the image using the Direct Selection Tool (the "white arrow" one) and look at the percentage fields in the Control Panel. (By the way, the resolution of the retina iPads is 264 ppi, not 262.)
    When importing an image, the easiest way to assure that it will be placed at 100% is simply clicking the loaded cursor instead of dragging it. Give it a try.
    But bear in mind that this "ppi" issue only matters for print publications. For tablet apps, what is important is the number of pixels; the resolution is irrelevant. For retina iPads, you need to use twice the size you use in a standard screen iPad. So, if you want a full-page image in an old iPad, the image dimensions must be 1024 by 768 pixels. If you want the same image in full screen on a retina iPad, create it with 2048 by 1536 pixels. You'll get a better explanation here: http://www.planetquark.com/2012/03/14/132-ppi-72-dpi-264-ppi-what-image-resolution-should- you-use-the-for-new-ipad/#.UhdbsLwWFL8

  • Image aliasing when exporting print PDF at 300 ppi (bicubic downsampling)

    Hello,
    i am trying to describe a problem which persists since version CS3 of InDesign. It's about aliased edges in images in a certain angle; occuring when exporting the brochure as PDF file (at 300 ppi). The placed images are always at a higher quality than needed (for example 780 ppi effective). The aliasing is not there when opening the original image files in photoshop (viewing at 100%).
    The PDF export settings are:
    - Compression: Bicubic downsampling to300 ppi for images above 350 ppi (for color images, grayscale images and monochrome images)
    - Crop Image data to frames
    - Marks: Crop Marks and Page Information
    - Output: No Color Conversion
    - Advanced: Transparency Flattener: High Resolution
    - Compatibility: Acrobat 4 (PDF 1.3)
    - PDF /X-3:2002
    Below are two screenshots
    - The left one was the original image, downsampled to 216 mm in width using automatic bicubic downsampling
    - The right one is the result when exporting a InDesign Document with the same width to a PDF with the mentioned settings
    Downsampled in Photoshop CS6 to 216 mm width
    Exported from InDesign CS6 with mentioned settings
    I have no clue what happens here, but it looks like the internal downsampling of InDesign CS6 is not very good.
    When i write a PostScript file of the brochure and put it in Distiller (with the same PDF Preset as above), the image looks like the one made with Photoshop. So this problem has to lie somwhere deep in InDesign or it's settings.
    Anybody with similar experiences?

    Rob Day wrote:
    Something about your test looks off. The export from ID and export from PS PDFs are both zoomed at 1200%, but the export from ID vrsion is 90% smaller.
    Yeah I noticed that I actually had the image in InDesign scaled @ 90%, so the effective ppi was around 650.  I get the same jagged results when I use anything other than a 300 or 600 effective ppi.  Whereas if I use a 650ppi image in Photoshop and export to PDF, it downsamples smoothly.
    Rob Day wrote:
    The diagonal lines in your test are 1 pixel so at 300ppi to an offset press at 150lpi, the lines would be less than a halftone dot so I'm pretty sure you would need a loupe to see any difference. Maybe with a stochastic screen there would be better resolution but still difficult to see. So if the printing is that good I would just export without down sampling. With disk space running at 15 cents a gigabyte there's not much to gain with a downsample.
    It becomes noticeable with some images more than others, but I'm printing a lot of images of buildings and drawings with sharp lines that converge to a point, or are distinguishable in the full size image but indistinguishable when downsampled.  This can introduce distracting patterns when they aren't downsampled smoothly, something like this:
    Unfortunately the printers near me aren't very good, so I'm having things printed online, and this particular printer (blurb.com - for a small job) won't accept large PDFs without compressed/downsampled images :/  I'm making 300dpi versions of the really crucial images for the time being, but I'm hoping there is a better solution!
    The other issue is exporting the PDF for use on the web, either as a download or on an online PDF viewer like issuu.com.  The two PDFs on the right side of my test look much better in these situations.  Is there any disadvantage to using Distiller to make my PDFs for this purpose using the Device Independent setting?  I don't have any special interactive elements. 

  • IPad Retina Resolution - PPI issue

    Hi All,
    I am really struggling to get my head around what is going on in my document.
    I am in process of creating a page for iPad. it only has to be a single PDF which will then go off into a magazine (publishing company will be doing this).
    Now the iPads all have different resolutions and PPI abilities. The original iPad and iPad 2 are 1024px x 768px @ 132ppi and the iPad Retina is 2048px x 1536px @ 264ppi.
    (See - http://www.apple.com/ipad/compare/ for specs).
    Now my issue has arrisen after I have tried creating a document in inDesign with the settings of 1024px x 768px @72ppi (default & unchangeable ppi settings).
    I create my image which ive made large enough & dense enough to ensure quality at the top end iPad. This image is at size 2172px x 1536px @ 528ppi (.
    When I place the image into the document at its full size, it is tiny inside the document. You can see this in the attached screenshot.
    Can someone please tell me what is going on, pixel wise and what I should be doing to create a document suitable for its prerequisites.
    Many thanks,
    Tim

    Now my issue has arrisen after I have tried creating a document in inDesign with the settings of 1024px x 768px @72ppi (default & unchangeable ppi settings).
    While placed images do have a pixel resolution, Indesign documents do not. So, when you make a new document with the Intent set at Web or Digital Publishing you get pixels as the initial measurement units, but you are free to change them after the doc is created.
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    If I scale up a 264ppi image to fill the page on a 14.22" x 10.66" page I get an effective ppi of 144, but when the page is eventually displayed on the smaller 7.7" x 5.8" iPad screen the effective res will go back up to 264ppi.

  • PDF Export Compression - Actual or  Effective?

    Hi,
    When I create a PDF Export Preset under compression I can set the downlsampling PPI for images at or over a certain PPI e.g. Bicubic Downsamling to 300 pixels per inch for images above 450 pixels per inch.
    When I place an image in a document I see the Actual PPI of the image and if I scale it or resize it I see an Effective PPI.
    My question is, when I set the compression values does the exporter use the Actual PPI of the image or the Effective PPI once I've placed it and sized it as I want?
    Tony

    If downsamples based on the effective resolution since that is all that really counts in the PDF file.
              - Dov

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