Fuji Frontier B&W prints

Discussion in 'Fuji' started by Martin Brown, Aug 1, 2005.

  1. Martin Brown

    Martin Brown Guest

    Has anyone else seen a weird fault occurring intermittently when
    monochrome (pure grey scale) JPEG images are printed on a Fuji Frontier?

    It doesn't happen every time, but when it does occur it always seems to
    be on files where there is no stored colour information (ie 256 grey
    level JPEGs). Most of them do print OK, but the ones that fail are like
    some wild psycadelic dream trip.

    The original monochrome image gets mapped to a consistent false colour
    image palette with abrupt transitions between saturated colours. As best
    I can work out the sequence from black to white goes:

    Black Purple Blue Green Yellow Magenta Yellow Magenta Yellow Magenta
    Yellow Magenta Yellow Magenta

    The results are beyond surreal and the staff were at a loss to explain
    why they had come out like this. About 1 in 10 shots were affected.

    It is a bit like solarisation on steroids!

    Thanks for any tips. I am pretty sure I can avoid the problem in future
    by not submitting pure monochrome JPEGs. It has never failed on a full
    colour image. I could understand if it failed for every monochrome JPEG
    but not an intermittent failure like this one.

    It doesn't look like a corrupt image file either. The Frontier previews
    the image perfectly well - but the print engine chokes on the data.

    (apologies if two copies of this thread occur - first copy went AWOL)

    Martin Brown
    Martin Brown, Aug 1, 2005
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  2. Martin Brown

    Colin D Guest

    Are you submitting the images as straight grayscale, or as RGB with no
    color data? I usually submit my b/w copies of old family prints as RGB
    images. I scan and work with the images in mono, then using 'mode',
    convert them to RGB. Haven't had any problems with Frontier prints. In
    fact, I'm amazed at how neutral the Frontier prints are, considering
    they're on color paper.

    Colin D.
    Colin D, Aug 1, 2005
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  3. Martin Brown

    Martin Brown Guest

    Pure grey scale 256 colour JPEGs with no chroma information at all.

    What I can't figure out is that some of them work OK, but all of the
    failing images belonged to this type. I also now know from talking to
    their operator that sometimes when scanning monochrome pictures they
    have seen the same problem.

    A normal chroma subsampled JPEG file that happens to contain only pure
    grey scale data never seems to show the problem.
    These could not under any sense of the word be described as neutral.

    Martin Brown
    Martin Brown, Aug 2, 2005
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