Determining image resolution

If you receive a file that was originally done in Illustrator but then converted into a PDF, and this file contains an image, is there a way to quickly determine what the resolution on the image is within the PDF. Trying to see what the print quality will be before it goes into production so low resolution images are quickly tagged. I have CS5.
Thanks.

Is this under Advanced > Print Production > Preflight > Sheetfed Offset CMYK
And all the images less than 150 ppi will show up with the red x's?

Similar Messages

Finding image resolution in a PDF?

I am currently working to perform some maintenance for an app that formats and resizes documents, usually PDFs. The problem happens when certain files are uploaded with an unusually large image resolution (according to the Preflight Properties, 2222.222/2222.222 pt/in). The documents with this resolution come in with file sizes of 36"x24" and end up formatted to 8.5"x11". This leaves the text and a lot of information unreadable.
I am using Visual Basic with iTextSharp to interact with the PDFs that come in. I'm able to find the width and height in points of the document without issue. Finding the image's width/height pixel count is what is giving me fits.
Is there any way in iTextSharp that I can determine the pixel count for the width/height of a PDF Image, or am I heading down a dead end street here?
Thanks in advance for any help you can provide.

I hate to reply again, but I'm still stuck. I've been through the SDK and documentation and have had no luck finding anything to help solve this problem. I don't really need to extract the image per se, I just need to find the resolution of it. Could you possibly point me in a definitive direction in the SDK/Documentation that I could use? There are a couple examples that deal with Preflight but none dealing with the image in the PDF or its properties.
Thanks in advance.

Aperture Image Resolution Problem

I know there have been a lot of posts about image resolution, but I haven't found an answer to my problem.
I use a DLSR and and shoot in RAW and/or maximum resolution JPG. When imported to Aperture, the file size is usually in the 10-15MP range. However, when I try to email photos in their "actual size" or export photos to BookSmart (blurb) to create a photo album, the photos become compressed (to about 1MP). According to blurb support, my 10MP images are only 96 dpi, and not enough for a high resolution image.
I have my image export presets set to highest quality, original size, and 300 dpi, so I don't know what the problem is. Can anyone help me?

Agree.
OP:
A quick review, just so we are on the same page.
Digital image files have two "sizes".
The actual image size is measured in pixels. The digital image comprises a grid of colored dots. Each dot is a pixel, which is short for picture ellement. The dimensions of the image are given as so many pixels in one direction (usually height) by so many pixels in another direction (usually width), e.g.: 600 x 800 pixels, or 4,000 x 6,000 pixels. The overall "size" of the image is calculated by multiplying the height by the width. In the examples given, the first image is (600 x 800 = ) 480,000 pixels. The second image is (4,000 x 6,000 = ) 24,000,000 pixels.
That's a lot of pixels. The size is often given in megapixels, where 1,000,000 pixels = 1 megapixel (abbreviated MP). So the first image is approximately half a megapixel, and the second one is 24 MP.
Pixels themselves have no other unit of measurement. There is no way from the pixel count to know how many inches (or centimeters) an image will be when printed or shown on a screen. In order to determine that, you must have the pixels-per-inch (PPI) of the printer or screen (or projector, or any other display device). A 600 x 800 px. image, at 100 PPI, will be 6 x 8 inches.
Pixels are device independent. PPI tells some programs and devices how big to display (or print) an image.
The other image file size measures how much data is in the file. Data is measured in bytes. One thousand bytes is a megabyte, abbreviated "MB".
Generally, the larger the image size, the larger the file size. But this is not necessarily so, and shouldn't be used as anything but a very general guide.
Your question is about resolution, which is a question of density: how many pixels there are in a given area. This is commonly measured in PPI. Resolution and file size are independent.
Message was edited by: Kirby Krieger

Image resolution from 72 to 300 for print

hello photoshopers.
if i am to print a large banner or Billboard that will be 10meters by 5meters height.lets say i do my documents settings 10cm x 5cm 72dpi in order for the mac to work faster,could i later change the document settings to 300dpi or would my print come out pixelated?
is it recomended to change the resolution from 72 to 300 at the end of a project?
thank you.

You have to do the Math in your scaling ratio. What you have to do is achieve around 100ppi image resolution at 100% final size for grand format billboard output. You could get away with 72ppi image resolution, so if your scale is 400% ( or file size @ 25% ); a 300ppi image res in the file will work. Now, to answer your question...no. Final resolution should be pre-determined at file construction / origination. So, if you want 300dpi document resolution at 100%; the file resolution should be 1200dpi / 300ppi min. Try to get in the habit of preparing your files this way. You should know going in what your final resolution requirements are for each project. It is faster to work at 72dpi, however, I'm not sure it is a good idea because Raster effects usually do not regenerate well sizing up to 300dpi later on.

Image resolution drops from Illustrator to Photoshop

Hello. I have an .ai with an image in it. After transfer to photoshop (by copying, or by saving the file as either .ai or .pdf and placing it in photoshop), the image resolutions seems to drop significantly (to about a third), telling by eyesight (is there a way to determine the resolution of an image (a pixel graphic) within illustrator?). Does anyone know why, and what to do about it? (Reason is that I need to get rid of the background, of which I don't know how to in ai.)
Thanks

It sounds like you are doing this backwards. Usually you remove the background in the image in PS and Place the image in Illustrator which is transparent to begin with ( i.e., no background unless you give it one ). If you must do it your way, just "Export" the file out of Illustrator into PS as high res. But, you can give your Ai file a document resolution ( File > Print > Output resolution ) of 2540 dpi and the Raster resolution at 300ppi. Copying it to PS will only give you PS's default res.

Image resolution resizing

This may be the wrong place for such a posting, or perhaps iPhoto is the wrong applicaiton, but how can I change the image resolution to make the file size smaller? I have a 1Mb image that I need to upload to a website that has a maximum upload file size of 500kb, I don't want to crop the image and lose part of the picture, so how do I reduce the file size? Thanks for any suggestions you may have.

Welcome to the Apple Discussions.
You can do this upon export of the file from iPhoto. Select the photo in the library and do File > Export > File Export. In the dialog box you have the option to scale image no larger than x pixels. Type in a number, and the other dimension will be automatically entered to constrain the proportions of the image. Export to your Desktop for convenience when uploading to the website. You can check the size of the export in the Finder. It may take a bit of trial and error to determine the correct pixel dimensions to get the file size that you want. After you have uploaded the export you may delete it, since iPhoto retains your file in the library.
Regards.

Image Resolution in Crystal Report

I am facing problem in image resolution when resizing big picture in crystal report.
Please help.

Thanks for your reply
The issue is the pictures (e.g. employee photos) are saved in Database as BLOB data type.
The report is loading employee photo into the report (e.g. employee card), but the loaded picture is coming up with much less quality than the original.

How do I change the image resolution of a photo?

Hi..,
     I am the beginner in Photoshop.
     I want to change one image resolution from 72 dpi to 300 dpi.
     So, I search and got one pdf for change the resolution of the image. In that they mention, take the "Printscreen" of the image and paste in the photoshop and change the mode(Index - flatten) and change resolution via the "Image -> image size -> Resolution".
     Like that i did, it changed correctly.
     After that I Open one already saved image file in Photoshop and do that same steps but the resolution was not changed.
So, now how to change that saved image resolution to 300 dpi...??
Regards.,
VISWA

Viswa,
To find the current resolution of your image, follow these steps:
With your image open in Photoshop, Image > Image Size (Like you've already done earlier).
Check the resolution as shown above. If it doesn't show 300, enter 300, hit OK and 'Save' your image.
Open the file and check again. If it still shows 72, post back with more details of the type of file you're trying to open in Photoshop and if possible, a screenshot so we can help.
-ST

How to find out the image resolution in illustrator?

How to find out the image resolution in illustrator cs through javascript or vbscript?
Thanks,
Prabudass

Anyone please help me, how to find out the embedded image resolution in illustrator file through script.
Thanks,
Prabudass

Overprint Preview, RGB, Image Resolution Acrobat v9

I recently started using Acrobat 9. There is 2 things I'm looking in V9.
1- Overprint Preview
2- All image resolutions in a HiRes pdf. I see a custom check profile called "resolution of color & grayscale images is between..." but I want image resolution is ...
3- Flag any RGB images used.
ThankYou

I'm sorry what I mean if a pdf have 35 images I would to see the image resolution of all of them independently if they are 72 or 600 dpi.

Continuous tone image resolution lower than specified

The following message was posted in the incorrect forum; no legitimate solution to the problem was ever posted. I am re-posting it, as this is the same exact problem I am having, right down to the OS and version of Acrobat. Could someone please explain to me what this means and whether or not I should be concerned about it? I will also get two different kinds of results... one is a single number effective ppi on this error, such as 199, (which results in 200ppi if run through PitStop), and a two-number effective ppi, which we haven't been able to decipher, such as 501.357/179.55ppi (which should be a hi-resolution image).
Help?
Amy Carolyn Watson
>
>
>Nikola Viereckel - 09:45pm Dec 9, 2007 Pacific
>
>Hi - I have recently discovered the above error message when I
>check my distilled press quality pdf in preflight. I am using
>a PC and Version 7.0 of distiller and acrobat. The images are
>300dpi and are in my documents at 100% or lower, so there should
>be no resolution issues. The pdf itself looks fine, but the
>preflight does not. I find if I export out of InDesign (CS2)
>then I do not get the same error message, but this is not my
>preferred way to create pdfs for print.
>
>Any ideas? I the only thoughts I have had is to reinstall
>the program. Thanking you in advance for your help.
>Cheers
>Nikola

> All text should export as vector, since it's all on a layer above any kind of image.
Is there any transparency in the text, though? If you float text over
an image with transparency, it MUST be exported as an image. If it is
floated over vector art with transparency, it MIGHT.
It's easy to assume that just because something is on top, it doesn't
ever need to be flattened. This is not in fact true.
>
>I am a little concerned: is this a flaw in the Acrobat Program?
You mean in its preflight? Unlikely, it isn't rocket science to
calculate ppi, so the numbers are probably right.
>
>Where is this "Continuous tone image resolution" turned on/off? Why is it important?
That's probably a reference to Distiller settings. I think we've
established that you aren't using Distiller.
>
>Is InDesignCS2 flattening to low transparency settings, even though my settings dictate high?
You'd probably need to ask in the InDesign forum. But bear in mind
that the flattener is free to use lower resolution if it thinks that
is all that is needed for particular effects.
Maybe you could reopen the PDF in Illustrator, and use that to select
the images in the flattened page. Might illuminate what is going on.
Aandi Inston

Exported Raw Conversion Image Resolution and Assigning a Color Profile, etc

In Aperture 1.1, although I set the exported Raw conversion image resolution to 300 dpi in the preferences, it continues to come out at 72 dpi which is something of an inconvenience. Also, is it possible to assign a color profile to the "exported version" so that it is congruent to my PS CS2 color workspace (if that is what its called). Is this program capable of carrying out a conversion as a background operation? Finally, can the layout windows be configured so that they remember how they have been used in the past? Thanks.

Iatrogenic huh! Cool!
Anyway, I'm not real clear on what it is you are trying to accomplish. Despite your obvious vocabulary skills, there seems to be some disconnect relative to what you are trying to accomplish. You are right that "exporting a version" in Aperture is roughly equivalent to what happens in ACR when you "Open" a RAW image into Photoshop. In both cases you have, hopefully, already done the adjusting of parameters you want prior to "exporting", or "opening". When you "open" or "export" you wind up with an "image" composed of pixels, whereas in the RAW adjustment phase you are just working with a temporary thumbnail and a set of mathematical instructions. Big difference, I suppose is that when you "open" and image from ACR into CS2, the resulting image is truly just pixels and has not had a "file type" applied to the file yet, until you "save" it, while in Aperture, if you "export" a file to CS2, or to the desktop, you end up with the file type already applied. Presuming you "export" a 16 bit TIFF or PSD, there is no operational difference.
I could be wrong, but with the new Bayer Demosaicing algorithms in Aperture 1.1, and the Camera RAW adjustments, you should be able to come up with an adjusted image that is VERY close if not identical to one done in ACR, with the possible exception of lens abberation adjustment. I was very critical of the RAW adjustments in 1.0.1, but I am very happy with the capabilites in 1.1. That said, I think there is still some room for improvement in user friendliness of some of the adjustments such as Levels.

Check image resolution and color

Please let me know whether it is possible to get the image resolution and color used in a eps file.
regards,
Sashi

You can specify the resolution for exporting, for document etc but resolution of the raster objects can not be retrieved.
Color space of the raster object can be retrieved using the rasterItems : colorants or imageColorSpace properties

Image resolution for Photoshop EPS bitmaps

Greeting all,
I've posted about getting image resolution before and have a script we've been using with great success but I just learned from my operator that the script never returns the resolution for Photoshop EPS bitmap files.
I'm using .Graphics(1)..ActualPpi(0) and most times works just fine except for the Photoshop EPS bitmap files. Photoship color EPS, gray EPS and a bitmap TIF saved from Photoshop works just fine. Everything except Photoshop EPS bitmap.
I've tried using .EPSs(1).ActualPpi but that yields the same result.
Is there somethnig I'm missing (again)?
Many thanks,
Ken

Hi guys,
I offer the following approach to solve the problem:
var myDoc = app.activeDocument;
var myAllGraphics = myDoc.allGraphics;
var myGraphic = myAllGraphics[0];
var myLink = myGraphic.itemLink;
var myLinkXmp = myLink.linkXmp;
var myCreator = myLink.linkXmp.creator;
if (myCreator.indexOf("Adobe Illustrator") != -1) {
    alert("The first link was created in Illustrator");
else if (myCreator.indexOf("Adobe Photoshop") != -1) {
    try {
        var myXres = myGraphic.actualPpi[0];
        var myYres = myGraphic.actualPpi[1];
    catch(err) {
        if (err == "Error: A value is not available for this type of image.") {
            var myXres = myLinkXmp.getProperty("http://ns.adobe.com/tiff/1.0/", "tiff:XResolution");
            var myYres = myLinkXmp.getProperty("http://ns.adobe.com/tiff/1.0/", "tiff:YResolution");
    alert("Resolution of the first link:\nX: " + eval(myXres) + " ppi\nY: " + eval(myYres) + " ppi");
Kasyan

Scanning of Film Prints by Processing Labs - Image Resolution

I shoot a fair amount of film, in addition to digital, so I usually scan my own photos to be able to use the image editor. I've asked around to the run of the mill photo labs (wally world, costco, kmart, etc) about having my images output to picture CD and there appears to be quite a bit of difference in the image resolution and output format they offer. Many of them can't top my basic flatbed scanner.
anyone have any insight into this, or suggestions for where I might go to get a 5MP output image tif?
Most of the photo labs offer jpg at around 1600 x 1200
thanks!

Tyler/Chuck
My comment came about for 3 reasons:
1) I have come across quite a lot of people who either buy or save up for DSLRs who don't need them. They just think it's the only route to good pictures. The reality is that, in some cases, they never get a good pic because the cameras are too complex. The main thing is to be aware of the options.
2) For the last 15 years of film photography [I gave up film 3 years ago], I used SLRs. There really wasn't a choice. I started out with a bag full of lenses, which I lugged around. I missed loads of pictures because I hadn't lugged it. In the latter few years I started using "super-zoom" lenses - 28-200 and then 28-300. The effect was that I just didn't need any other optics. I was still carrying a camera weighing about 1Kg, but that was an improvement.
3) For me, photography is about taking pictures. Period. I come across so many people who are obsessed with all the equipment. They buy all the mags and are always hankering after something new. I sometimes wonder if they ever take any pictures [other than all those "test shots"]. I've had the same digicam for 3 years. I might upgrade it soon, but I'm not in a hurry.

Determining image resolution

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