Greyscale jpegs at 300 dpi

Hi -
I have just changed from using Photoshop CS3 on a PC to CS5 on a Mac. Most of my work is deisgn in Quark Xpress 7 -- using Photoshop as my image editor.
I have tried doing some work today on a greyscale newsletter design. I started this work on my old PC and am completing it on my new Mac. The photos I had already edited and saved as jpegs in CS3 on the PC show up fine in Quark at 300 dpi, but the photos I have edited today in CS5, converting to greyscale and cropping to 300 ppi will only show up in Quark as 72dpi. If I convert them to CMYK Quark will recognise them as 300dpi.If I save them as PSD files in grey they will show up as 300dpi, just not as jpegs (which I'd prefer) and bizarely when saved as TIFFs are recognised as 260dpi!
At first I thought this was a Quark problem, but it doesn't look that way as the greyscale images from CS3 are working fine.
Is there some setting in CS5 about the way jpegs are written in greyscale that I am missing?
Any help gratefully received.
Thanks,
Greg Smith

Marian Driscoll schrieb:
It is fairly equal with 2002's InDesign 2.0 in regard to PSD and PDF support.
InDesign has extended it's PSD, PDF/PDP an AI support since then. 9 years! We live in 2011!
Do you know InDesign? Quark cannot export PDFs with live transparency up to today. This was possible since InDesign 2.0.
Same color management capabilites? None of them?
Layer Compss from Photoshop?
Direct support of AI files? (AI files contain a full pdf if compatible to pdf seaved.)
Fully supported RGB workflows as InDesign does?
Or do you really compare Quark's typography to InDesign's? Nested styles? Inline styles? GREP styles? Language tagged to the character, not to the paragraph or like Quark does to the whole document? Language based apostrophes?
Are you sure you want to compare? I am aware on Quark and I am aware that PDFs created from Quark are not the same as PDFs exported from InDesign. I have both applications on my computer. Do guess with which application I create only my stuff? InDesign, because I know both applications.
And if you want to compare Quark 9 to InDesign, then you should not tocompare it to version 2.0 which is now 9 years old, you should compare it to a future version of InDesign which will be available at that time. No one knows which functionality this InDesign version will have because no one knows when Quark 9 will be available. And neither no one knows what Quark 9 will can. Even if it would be announced now, Quark never fulfilled it's promises in the past to any future version.
Quark has never been able to solve problems in the past. Outside of the US is Quark way too expensive. (Sure InDesign costs much more here in Germany too.) Quark single version costs about 1.340,– Euro, InDesign 1.010,– EUR inclusive tax, or 1.126,– versus 849,– exclusive Tax (1.500 USD without tax versus 1.135,– USD). Quark has become much cheaper since InDesign hit the market here. But if you buy an Quark update you cannot be sure that the delivered serial will work. With the previous version it took me 4 months to get a working serial. Everyday phone to Quarks support. Expensive phone numbers outside Europe, because they are in Switzerland. (CH is not part of the European Union.) Virtually no one here in Germany buys Quark to create new art with it. It was only bought to use old files newer computers or because some partners deliver files which have to be opened. Have you ever tried to contact Quark's support? Maybe that you get one on the phone, but you will never get help.

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Converting jpeg to 300 dpi

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I new to Illustrator CS5 scripting (javascript) and I'm trying to export an .eps to .jpg. With image quality 8 and DPI 300.
I've seen several post asking about this (only a few with answers). Those answer aren't working for me though.
I also found this post saying that it can't be done (http://forums.adobe.com/message/1103680) but it's pretty old.
When I run the script I have it saves with a DPI of 96 which is higher than the minimum mentioned in the post above.
Thanks very much. A snippet from my script is below...
var targetFile = new File(fullFileName);
if(!targetFile.exists) {
var type = ExportType.JPEG;
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You'll have to reduce the size of the resulting image file to achieve resolution you want. I just did something similar and the file was as expected 416.67% larger than the original. When reduced to 24% of the size, the resolution is 300 ppi.

Why jpeg file exported from Aperture with 300 dpi's it opens with 72 dpi's on PS ( image size)? I've tried several combinations and all give different results. And I am confused on what is the best workflow for me.

Ok.
My workflow is
RAW > Aperture Library > export jpeg high resolution 300 dpi's > one file on PS > edit > Save us jpeg. The I realised that files from PS were being save in a smaller size from the ones exported form Aperture. That is when I went o see <image size> on PS and files were with 72.
Since ten I've trying different things
1. Aperture > export as PSD > open on PS > edit > Save us jpeg = small file (around 15 MB)
2. Aperture > export as jpeg high resolution 300 dpi's > open on PS > CHANGE dpi's to 300 on <image size> edit > Save us jpeg = big file (Huge, actually)
What am I doing wrong? Would someone give me guidance and tell me what is the best workflow, considering I edit photos to deliver to my clients and I shall give them 300 dpi's.
Thank you

This is a known Aperture issue: Problem with Aperture 3.6 preset exports. | Apple Support Communities
Benjamin

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WallStShari wrote:
I had cropped my image to 3 x 3 first.
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If you truly want square pictures, then crop to 4000x4000 or 3000x3000 or 2000x2000 etc. in other words: crop determines aspect ratio (overall retangular shape: square, wide, tall, ...).
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If that doesn't do it, then you need to get more specific instructions from her.
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WallStShari wrote:
She said it only came to her at 240 pixels square.
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Processing images as 300 dpi jpegs, comes out at 72 dpi.

I've seen two other posts with the same problem with no answer, so I thought I try as well. I am using Ap 2.1. I've processed the images in both the preset jpeg original size with the edit to 300 dpi. I've also made a custom preset with 300 dpi jpegs. Both times the images open in PS at 72 dpi. I processed them as tiffs at 300 dpi and they open in PS at 300 dpi just fine.
I've tripled checked the file-export-versions-JPEG original size-edit-300dpi.
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J,
I am repeating a post I made in another topic about this issue -- I would appreciate your thoughts:
I conducted a test that may or may not tell us something, but: I had a project with an imported photo scanned at 600 dpi and saved as a .psd at the time of the scan, before importing into Aperture. If I export that photo as a .psd, then PS will open it with a dpi of 72, but GC will open it with a dpi of 600. However, if I export that photo as a .tif, then both PS and GC open and report it to be 72 dpi?
I am not sure, but I think this is an indictment of Aperture?
Please tell me about the possible impact at any printers you use, since if the print size is specified, and not pixels have been lost, the image will print as you intend? I have some reports this has been seen with iPhoto, but ultimately not an issue, but I have not research with any printers.
Ernie

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I have a tiff file of a painting I scanned at 300 dpi. It's original image size when I open it is photoshop is 57.8 MB, 18" W by 12.477" H, Res 300. I need to resize it and send it as a 300 dpi jpeg. I have started in the image size dialogue box and just change the W to 11.25. That automatically changes the H to 7.798 and the res still says 300. The file size reduces to 22.6 MB. I click ok and then go to save as and choose jpeg. In the jpeg box I chose 12 Max and baseline standard and click ok. The saved file is reduced to 8.5 MB. When I open it in photoshop, it opens at 300 dpi when I look in the image size box. However, when I send it to someone else and they open it, the file is only 72 dpi. What am I missing to get the file to save at 11.25 inches, jpeg, but remain 300 dpi?
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Sheilaartist

I have a tiff file of a painting I scanned at 300 dpi. It's original image size when I open it is photoshop is 57.8 MB, 18" W by 12.477" H, Res 300.
That means you image is 18x300=5400px wide and 12.477x300=3743px high widthxheight=numbed of pixel 3 bytes per pixel for 8bit color 5400x3743x3=60,636,600 which is close to Photoshop 57.8MB estimate or the Tiff file is 57,8MB.
I need to resize it and send it as a 300 dpi jpeg.
Then all you have to do is resize the open document and save a jpeg file.
I have started in the image size dialogue box and just change the W to 11.25. That automatically changes the H to 7.798 and the res still says 300.
That means you also have RESAMPLE and Constrain checked in the Image Size dialog bottom control section and some interpolation method is set. Photoshop will reduce the number of pixels you have for the image. When you click on OK Photoshop will generate a new image that is 11.25x300=3375px wide and 7.798x300=2339px high
The file size reduces to 22.6 MB.
The file is not changed when you use Image Size. The Tiff file remains as it was before it was opened. Photoshop is a document editor not a file editor.
I click ok and then go to save as and choose jpeg.
When you use "Save as" and use the pull-down menu and select Jpeg you will be saving a new file and not be over writing the tiff file.
In the jpeg box I chose 12 Max
That is a quality setting the higher the number (Max 12) the better the file quality will be the file will be less compressed then when lower quality setting are used. You would be hard pressed to see any image quality difference between quality 10 file and quality 12 file. The quality 10 file size will be quite a bit smaller then a quality 12 jpeg file.
and baseline standard and click ok. The saved file is reduced to 8.5 MB.
The new jpeg file size is a product of the jpeg quality setting and how well the image data compresses. Size can vary all over the place. Images with lots of fine details will be larger then images with little detail. An image of a white wall will compress much smaller the an image with the same number of pixels that has a lot of details like an image of a cross word puzzle.
When I open it in photoshop, it opens at 300 dpi when I look in the image size box.
Correct you did not change the resolution when you resampled the image.
However, when I send it to someone else and they open it, the file is only 72 dpi. What am I missing to get the file to save at 11.25 inches, jpeg, but remain 300 dpi?
If when they open the file the receive they see an image that has a 72dpi resolution. It means either what you used to send the file resized the the image and sent a different file or what was used to receive the file resized the image and saved a different file. Or the image was resized by the image processor the user used to open the file either during open or after it was opened. For example if the user received the file you saved and sent 3375px wide and 2339px high and 300DPI and opened it in Photoshop and Photoshop is set to open Jpeg images through ARC the users ACR default workflow setting could be set to open image at 72DPI. An image dpi is a setting the image may still be 3375px wide and 2339px high however set to 72 DPI the print size would be 3375px/72=46.875" wide and 2339px/72=32.486" high using Image size changing itr 72dpi print resolution to 300dpi with RESAMPLE NOT CHECK would return it size to 11.25" x 7.798" at 300DPI.

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This is a screenshot to use as an example:
The folding instructions graphic is also 300dpi.

Thanks Hackintosh.
It prints as it views, as a corrupt jpeg. I also dug into console and it confirmed there was an error about a corrupt jpg. The most interesting thing is if I open the bad pdf in Photoshop the whole image is there with no signs of corruption. This leads me to believe it's something with how OSx and/or Safari are rendering the jpgs. Another curious sidenote, Safari on Windows works fine but if you save the pdf, move it to a mac and open it, you get the corrupted jpg again.
I think I'm going to try and stop swimming upstream now. At the end of the day I don't care if the images are pngs, tiffs, or eps. I'm going to try feeding a few different formats and see if that doesn't fix the problem.

Exporting Jpegs from Lightroom - DPI question

When I export Jpegs from Lightroom, I set the dpi to 300 pixels per inch. I do not specify a max width or height. When I view these files in Adobe Bridge (CS2 or CS3) the file info says 300dpi. However, when I open the files in Photoshop and select image size, It says 72dpi and has the document size set to very large. I realize that I can enter 300 dpi and uncheck the resample box, I am just confused as to why this is happening.
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the image resolution is a combination of the two parameters you mention: size and dpi. a very large size at 72 dpi is equivalent to a small size (like 3x5) at very high dpi. for printing you want at least 240 dpi at the largest size that allows you to keep that resolution. for screen presentations or your web site you want jut 72 dpi. 72 dpi and 2x3 inches will require a very small file size.
I suggest you to export images at TIFF and not JPEG as that will allow you to preserve the image quality when doing editing in PS.
In my case I export TIFF for PS (when I need PS editing) and 72 dpi JPEG for my web site (that way if somebody downloads my image illegally thy get a poor resolution copy). But since LR works very well for me 90% of the images re just kept in raw mode and I print from LR.

Why is iphoto compressing my 300 dpi pics to 72 dpi after I have made edits?

why is iphoto compressing my 300 dpi pics to 72 dpi after I have made edits like color correction?

It is not compressing your photos other than normal JPEG cpompression
DPI is meaningless without inches (Dots per Inch) which digital photos do not have
There is a field in the EXIF data that records a DPI but it is meaningless - basically it says that this photos was displayed on a computer screen which is a 72 DPI device
The photo is exactly the same dimensions and resolution as before editing (unless you cropped it)
See The Myth of DPI for additional information.
LN

Iphoto converting edited photos from 300 dpi to 72 dpi

I edit RAW photos and save as Jpeg The dpi reduces from 300 dpi to 72. I have seen an archived discussion saying basically this does not matter. The size of my photo is 3872x2592 for 2.4mb when edited. Unfortunately a newspaper has refused to print a photo as they will only print at 300 dpi. I have converted this photo back to 300 dpi using preview but apparently 'blowing up the pixels blurs them? Is there any way I can edit and still maintain 300 dpi?

Yes you can do tat but it akes NO DIFFERENCE - the newspapr has no idea how digital photography works
see http://www.rideau-info.com/photos/mythdpi.html for more details
Simply put no digital file has any DPI (yes there is a DPI field in the EXIF data but it is simply a number and any competent printer simply ignores is since it is meaningless
DPI is dots per inch and therefore can not exist until you have "Inches" - until you print - then DPI is a simple mathmatical calbulation - the dots (pixels) divided by inches (Dots Per Inch)
If you give the newspaper a 3872x2592 file then they can print it up to 12.9066667 Inches x 8.64 inches at 300 DPI (3872/300 x 2592/300) -- if the print is suppose to be larger than that then you need a higher resolution camera
And although it makes no difference newspapers do not need more than about 120 DPI because of the overall quality of their printing
LN

How do I know if I am at 300 dpi in iPhoto?

I have to send jpegs of my artwork for a bid. They want the jpegs to be a maximem size per image 300 dpi. How do I know if I am at 300 dpi in iPhoto?

DPI has no meaning unless you know how big a print they want to use. Check the pixel dimension of the photos you have and divide them by 300. That's the size of the print you can print at that dimension. This explains it in more detail: The Myth of DPI. Send them the largest verson of the photos as that's the best you can do.
We get this question a lot. Can you ask them what print size at 300 dpi they want? Then you can resize the files to those exact pixel dimensions, i.e for an 8 x 10 give them 2400 pixels x 3000 pixels.
OT

If exporting images for backup, to reimport into a clean aperture or other program, is it best to use 72 dpi or 300 dpi, or does it matter?

If exporting images for backup, to reimport into a clean aperture or other program, is it better to use 72 dpi or 300 dpi, or does it matter? I want the best quality for any future unforeseen use.

I am somewhat reluctant to answer your questions after Frank Caggiano's excellent advice, but I really do not like to leave the question open, for there will be many occasions when you will need to export images and to understand how it works.
But please, follow Frank's advice, right now you do not need to worry about pixels and dpi. That is exactly what I meant, when I suggested to you to make sure you keep a copy of your Aperture Library and to back it up with all your other data, before you erase your disk for a clean reinstall.
DPI revisited:
So, is the dpi setting only for exporting to print?
The dpi settings are necessary to define the size of a digital image, since pixels don't have any dimensions. And since you cannot print or display an image without knowing its width and height, you will need to specify dpi when you are printing or scanning.
If I leave it at the default 72dpi will there be any problems getting quality prints in the future from jpeg versions exported with that setting?
Not if you export with the original size - the maximum number of pixels available. That will ensure the maximum print quality.
The dpi settings are required to export versions; versions are derived from the masters and new image files are computed. When you export masters you get a copy of the original file that already may have a dpi setting.
If I choose "export masters", will aperture will export my masters just as they are?
yes, and you may add IPICT data if you choose
Pardon my thick skull--I'm an old dog trying to learn new tricks in this digital world!
No apologies necessary, we were all beginners once
Here is another example, maybe that helps a little:
I exported an image (jpeg) with three different setting: export masters, a version with 72dpi, a version with 300dpi and inspected the files in Graphic Converter:
The master was exported like this:
Notice, the master had already dpi settings, although I did not specify any on export.
The size is 51,48 cm x 38,61 cm.
The 72 dpi Version has larger dimensions, but also 10 Megapixels.
and here the 300 dpi version: smaller dimensions, same amount of pixels.

Greyscale jpegs at 300 dpi

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