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Quark 9 remembers Alpha Channels in images.

Last post 02-10-2012 5:18 AM by johnarmour. 4 replies.
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  • 02-09-2012 9:09 AM

    Quark 9 remembers Alpha Channels in images.

    We are having problems with Quark 9 remembering Alpha channels on images. A document gets supplied to us with all the images planned in as .PSD documents with Alpha channels. The images were cut out in photoshop and flattened to photoshop eps. These images are then placed into the quark file as a cutout with an overall background with shadows etc on underneath it. When the output to PDF the cutout is pixellated and of a lower quality than before. If we save the document into Quark 8 the Cutout image shows an Alpha channel still there??? This doesn't show in Quark 9??? Once you switch the Alpha channel in Quark 8 off, it outputs fine. Put another way in Quark 9 if you create a thin PDF with OPI ticked the cutout which no longer has an Alpha channel on it, still remains on the thin PDF. ( This should be white). The only workaround I have so far is to create a new image on a new document and plan into a new quark picture box. Not ideal...
    Mac OS 10.5.7
    2 x 2.8GHz Quad-Core Intel Xeon 10 GB 800MHZ Ram
  • 02-09-2012 10:30 AM In reply to

    Re: Quark 9 remembers Alpha Channels in images.

    Does this happen only if you Update from PSD to EPS through Picture Usage or if you use a fresh File Place or the script to Replace a picture? At some point it was a known bug that the shadows became detached from text but can't remember it happening with pictures.
    ... there was the puzzle of why the sun came out during the day, instead of at night when the light would come in useful.
    Terry Pratchet
  • 02-10-2012 3:20 AM In reply to

    Re: Quark 9 remembers Alpha Channels in images.

    The images no longer have an alpha channel on they're planned in with a photoshop path, but when ouput to PDF the image is slightly lower quality. Put another way if you plan an image in at 90% it should output at 270 DPI. However the image that did have an Alpha channel is re-sampling to 340 DPI and is jaggy.
    Mac OS 10.5.7
    2 x 2.8GHz Quad-Core Intel Xeon 10 GB 800MHZ Ram
  • 02-10-2012 4:03 AM In reply to

    Re: Quark 9 remembers Alpha Channels in images.

    I was assuming that the images no longer had an alpha channel. What I was trying to say is that somehow Quark is still seeing and using the alpha channel from the previous image, so internally to quark it has become detached from the original image and embedded into the quark Document. There are 3 ways I could think of that you could exchange your original psd image to the EPS with a clipping path; 1 you can place the new file, scale and move into position and delete the old; 2 you can go to Picture Usage and update a missing or modified file (dangerous when swopping file type): 3 you can use the Script to update a picture maintaining scaling and position. I must apologise that it appears option 3 is no longer available and has been replaced by the Maintain Attributes checkbox inside the File>Import window, you could try and see if having this checkbox unchecked would clear the alpha channel data?
    ... there was the puzzle of why the sun came out during the day, instead of at night when the light would come in useful.
    Terry Pratchet
  • 02-10-2012 5:18 AM In reply to

    Re: Quark 9 remembers Alpha Channels in images.

    Yes unchecking the attributes box appears to work. Cheers.
    Mac OS 10.5.7
    2 x 2.8GHz Quad-Core Intel Xeon 10 GB 800MHZ Ram
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