Image Masks Not Downsampled

Hi,
We have a PDF that we want to reduce the file size. When we select reduce file size, we get a window that reads "document contained image masks that were not downsampled". What does this mean? The 20 page document contains a lot of cut and paste images of maps and site plans that were built in PowerPoint and InDesign. Using Acrobat 9.
What steps do we have to take to correct this so we can reduce the file size?
Thanks
Barb

It means that the images have a vector mask controlling which areas are visible (acting as a crop). These aren't affected by a RFS action as the vector data is as small as it can be, but the warning is shown because if the underlying bitmap image is resampled, there may be some issues around the edges of the mask (e.g. if the mask very accurately cuts out a shape from a background, some pixels of the background may appear if the image PPI is reduced).

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Image mask not moving as I move camera ...

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Something you mentioned about Z plane was spot on.
I adjusted the Z plane and it now works.
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I often work on those kind of products and i should fix the problem
thank you for your help.
Aldo

I tried using the file you posted as an image mask on a 8150x1200 project and I got similar results as you did.
Although the image used as a mask is the same size as the project, it got stretched horizontally, producing "fat" people.
However, placing the same image on the timeline as a regular clip does not stretch it.
This suggests a workaround, that in my limited testing seems to work. (emphasis on workaround, since I believe it should not be necessary).
Connect your would-be-mask above the clip, and change its blend mode to stencil alpha.

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If you are able to set the mask image as the movie file, then you should try setting the mask type to luma, rather than alpha - since the alpha movies are probably black and white images which actually do not contain an alpha channel.

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I'm using the IMAQ quantify VI from labview to analize a binairy image. This binairy image is an 8bit image that consists only of pixels with the value 0 or 1. The places of the binairy image where the pixels have the value 0, mean that a corresponding image has not data in that place. A pixel value of 1 means that there is data that should be processed later in the program in the corresponding image.
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With my Mac, I embed jpg images in Microsoft Word documents, save them as pdf's, and reduce them. Size reduction often fails, with the error message "The PDF document contained image masks that were not downsampled". Jpegs don't have masks, so I have no idea how to fix this problem, and an extensive google search was of no assistance.

Use PNG images instead use an application such as Graphics Converter, Fireworks to convert to .png from .jpg.
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Which pdf has an image mask?

Hi guys,
I am making a document in InDesign with many linked pdf as graphics and charts. When i export the InDesign document to PDF it says it has some Image Mask that were not downsampled. How can i tell which of my PDF has an image mask?
Thanks for any info,
Cheers,
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Hi,
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Have you tried copy/pasting the elements from the other Motion projects (by opening them all at once) instead of importing?
Patrick

Image Masks?

I've always gotten this warning after saving a PDF containing JPEGs. What is it, how does it affect my final PDF, and how can I fix it?
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"The PDF document contained image masks that were not downsampled."

See my explanation of image masks here: http://forums.adobe.com/message/4227572#4227572
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Occasionally, when I try to reduce the file size of a PDF file in Acrobat X, I am getting the error message that the file was not re-rendered because of "image masks".
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In this case, it was a simple Word document including a text and two semi-transparent GIF images on top of each other placed behind the text.
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Try to flatten the pdfs that should get rid of the masks (use Preflight tools).

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I am new to using Muse and have created only one site before in Muse. I have taken screenshots to show the problem I am having.
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Use a PNG file. I see nothing in your logo that would warrant using anything else. You're not scaling it, there is no interaction and all you are doing is masking out some data that is pixels already. Pardon me, but using an SVG makes no sense at all. Beyond that one would need to see the file, but my guess would be that the "responsive" setting once again embeds some garbage data. Wouldn't be the first time...
Mylenium

Transparent Image does not open well in Adobe Ilustrator

Hello,
Thanks for the answer to my previous question
I have a code that uses PDF Library to generate a PDF file. This pdf file includes an image and a soft mask applied on it.
When I open the pdf file in the Adobe Reader the file opens well. But when I open it in Adobe Illustrator, the soft mask seems to be not correct. (wrong areas become transparent)
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When I change the soft mask to 8 bits per component it opens well in the Illustrator.
I added padding to the soft mask so that each row size is a multiple of 8, in order to fix a similar problem that I had with Adobe Reader, and this seemed to fix the problem.
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Adobe Illustrator is NOT a PDF editor. It does NOT support all features of PDF, so some things may not be correct.
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Thanks JohnH

JohnHutchinson wrote:
… How can I remove the Image Mask label from the Effects tab in the Inspector window?
just click onto the grey bar and…
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Hi every one!
I have this problem with my mask not working properly, i have an image, and it has an red fruit sitting on a table,
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so its KIND OF working but not really.
Cheers
Bunny Face

Check your mask by OPTION CLICKING on the mask icon on the specific layer. This will show you a greyscale mask. BLACK hides, WHITE REVEALS. SO obviously grey does half of each! So if you dont want the apple to be affected by the layer mask you must paint it BLACK in the mask of that adjustment layer.

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Hello Again.
Despites wise advise of ¨just call me dude¨I obtain what I need, He oppens a new interrogative.
How to modify background´s image mask. It drops some kind of shadow at the upper right side of the image and become´s dark in that place.
That is great, but I am tryiong to find how to eliminate it or make it less dark.
I know this is a hard question, but I´ll give a chance to destiny to point me in the right path.
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AH

Hello, Arturoherva,
I followed what you are asking. I downloaded Plistedit pro, and found the steps to modify the Reflections blurring in iDVD 6 themes. The same process does not work for iDVD 7 (08), because the Revolution theme is not organized in the source file in the same way. I could not locate a similar folder with the Resource option.
I think this may be able to be done, but not with the same steps as given in the example on the link you provided.
There probably is a command to lighten the background of the Revolution theme, but the steps listed for PlistEdit are for themes prior to iDVD 8.
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Image Masks Not Downsampled

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