Jpegs Getting Reduced

Hello,

According to the Pages '09 manual on page 257 when you select Best as image quality (when you export to pdf anyway) then the image resolutions are not reduced. This sounds like the images are stored with their original resolution.

I'm guessing that if we CAN'T change the export resolution then Pages picks one for us! That explains my ePub format problem.

I don't understand why we need to do all the things that our friends have recommended. That's why I'm sticking with pdf versions (for awhile anyway) when we publish our documents.

Jacki, I still don't believe that Pages changes the sizes. Have you added an images and save the document. After that pull out the image, which is dine in the Metric Inspector > File info and the check which size the image have?

I have done that and open it in Photoshop and the size is still the same!

Are you sure that CreateSpace is doing the translation correct? Really sure?

Just drag the icon to the desktop.

CreateSpace might not work well with Pages? Do they say it is OK with Pages?

Jacki,

Are you using and drop shadows or other transparency? This will reduce resolution. Are you uploading file as Pages or PDF? If PDF, try this:

To achieve 300 dpi resolution in drop shadows, open the ColorSync utility Filters and duplicate the Create Generic PDFX-3 Document filter. In the copy, click on the arrow to the left to open the drop-down. Then click on the next arrow, Create PDF/X-3 Document. Enter 300 in each of the boxes labeled Resolution. It will save with “copy” added.

When you want a 300 resolution PDF, go Print > PDF > Open in Preview > Save as… > Quartz > New “Copy” filter > Save. (Do not use Export.)

Using this filter will give you 300 dpi resolution in drop shadows and other transparencies.

Walt

Jacki,

Basically, yes, I just do the math. For example, I just used Photoshop Elements to crop a 300 dpi photo to three inches square and saved it (as a jpg). So I know it is 900 pixels by 900 pixels (I can use the inspector in Preview to verify that.) When I dragged it into a new Pages page layout document, it appears as 4.83 inches square, but Pages doesn't change the resolution in the sense that it is still 900 pixels squares, so 900 / 4.83 = 186 dpi. If I bring it back to three inches square in Pages, it will be 300 dpi.

[I did the same thing with a two inch square, 300 dpi jpeg and it also showed up as 4.83 inches square in Pages, so that one was 124 dpi. But, again, if I reduce the size back to the two inches it was in PE, it would be 300 dpi.

4.83 inches is about 75% of the distance between the default margins; maybe Pages thinks that is a nice size for a small image to start at.]

Pages won't change the number of pixels in an image; if it has the same dimensions in Pages as it did in the original program, it will have the same resolution, but if you make it (or leave it) bigger, the resolution will have to be less.

I tried an experiment (at 01:00 hrs local time !!!!!).

I opened a new Pages document and dragged a photo from my iPhone4s onto a blank page. It resized itself visually to fit my margins. Now I selected the image on the page by left clicking on it and then COPYING it into the clipboard.

I opened Preview and did File > New From Clipboard.

Then I resized the Preview image to full screen and it looked just as clear as if I opened the original photo!!!

Just for the heck of it I dragged the image from the page onto the Preview icon in my dock to launch Preview and use the dragged image to make a new picture. What happend? The image was now grainy.

Hmmmm Just Guessing but evidently when I dragged the image off the page I got THAT image, the displayed image but when I copied the image to the clipboard I got the original image!

It makes sense. Pages keeps both. One copy to display on the screen for speed to display the page and then the full version to use for editing and resizing etc.

My head hurts. I'm going to bed.

Jacki,

I too am confused about how Pages handles the resolution of imported JPEGs.

Here are the steps I followed and got results similar to yours where the original image size was not maintained when imported by Pages.

Scanned Image
I scanned an image at 300 dpi and set the size to .66 inches wide by .72 inches high. This gave me a image with these dimensions is pixels:

197 pixels wide = .66 inches (multiplied by) 300 pixels/inch

216 pixels high = .72 inches (multiplied by) 300 pixels/inch

Photoshop Verification

Photoshop Elements verified the image's dimension and resolution:

197 pixels wide, .66 inches, @300 dpi

216 pixels high, .72 inches, @300 dpi

Preview Verification

Preview's Inspector verified the pixel dimensions and resolution, but I did not see where it then calculated the dimensions in inches:

197 pixels wide, @300 dpi

216 pixels high, @300 dpi

Pages Complications

I then imported this image into Pages where the Image Inspector reported these dimensions in inches, but no resolution nor pixel dimensions:

2.74 inches wide

3.00 inches high

I suspect as do others that this dimension was set by Pages by using an image resolution of 72 dpi instead of the image's actual resolution of 300 dpi:

2.74 inches wide = 197 pixels (multiplied by) 72 pixels/inch

3.00 inches high = 216 pixels (multiplied by) 72 pixels/inch

Frustration

I specifically set the 300 dpi resolution and the image's dimension in inches during the scan so that further adjustments in size in Pages would not be needed. I too think it would be very helpful to know how Pages is handling image resolution and whether or not its current behavior is a bug.

Sorry, math correction:

I suspect as do others that this dimension was set by Pages by using an image resolution of 72 dpi instead of the image's actual resolution of 300 dpi:

2.74 inches wide = 197 pixels (divided by) 72 pixels/inch

~~~~~~

3.00 inches high = 216 pixels (divided by) 72 pixels/inch

~~~~~~

It is frustrating when Pages doesn't give you the measure that you want. It seems you stil have the same amount ixels and that is what counts. You can shrink the images to .66 by .72 and you'll still have the same ammount pixels.

Right, I reduced the image size in Pages to the original scanned size.

Did you find that Pages does indeed retain all of the original pixels even though it appears to reduce the resolution to 72 dpi? In this case, does Pages actually keep my image as 197 x 216 pixels?

Thanks.

fruhulda wrote:

If it is dragged in a 300 dpi it should stay as 300 dpi!

Should, but doesn't. I've never been able to figure out how/why Pages works it out the way it does.

Peter