Any Minolta/Sony users using UFRaw and GIMP?

Discussion in 'Digital Cameras' started by Jeffery Small, Apr 5, 2014.

  1. Jeffery Small

    Tony Cooper Guest

    No agenda at all. It's strictly reactionary. You do know "agenda"
    means "a plan of some sort"? I can't very well have an agenda
    regarding what might be posted in the future.

    When he says something that needs reined in, I react.
    No, I would say that the sky has no color. Rayleigh scattering can
    give it the appearance of blue, though.
     
    Tony Cooper, Apr 18, 2014
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  2. Jeffery Small

    Eric Stevens Guest

    Dan Margulis discusses this in detail. It is his opinion that, based
    on trials, whatever color distortions there may be are generally
    imperceptible.

    Fraser, Murphy and Bunting (Color Management) regard Lab as the work
    horse of color management systems.

    Wikipedia http://en.wikipedia.org/wiki/Lab_color_space says

    "Because Lab space is much larger than the gamut of computer
    displays, printers, or even human vision, a bitmap image
    represented as Lab requires more data per pixel to obtain the same
    precision as an RGB or CMYK bitmap. In the 1990s, when computer
    hardware and software were limited to storing and manipulating
    mostly 8-bit/channel bitmaps, converting an RGB image to Lab and
    back was a very lossy operation. With 16-bit/channel support now
    common, the loss due to quantization is negligible."

    But none of this explains why you think Lab requires extra color
    conversions.
     
    Eric Stevens, Apr 18, 2014
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  3. Jeffery Small

    Eric Stevens Guest

    Have you not noticed the paen of praise for the enormous effect Light
    Room has had on his work flow emerging from nospam?

    Dear me! Have just joined this thread?
    From your mirror?
     
    Eric Stevens, Apr 18, 2014
  4. Jeffery Small

    Sandman Guest

    I have proven that this is false.
    agenda
    noun
    • the underlying intentions or motives of a particular person or group
    You react very predictably and with severe animosity and only if nospam is
    saying it. If, for instance your troll buddy Eric were to use the phrase
    "most people", you wouldn't blink. He's done so eight times in the last
    three months. nospam have used it 14 times in the same time period, yet you
    single him out.

    That's having an agenda. You're welcome.
    See what I mean? You would argue for the sake of argument, just because it
    was nospam who said it.

    You basically just went "I have no agenda, no wait, I do".
     
    Sandman, Apr 18, 2014
  5. Jeffery Small

    Sandman Guest

    You have yet to point to a quote from nospam saying his previous workflow
    was ineffective. A tool making something more effective does not equate to
    the former method being ineffective.
    From you.
     
    Sandman, Apr 18, 2014
  6. Jeffery Small

    Guest Guest

    dan marguilis also said there's no advantage in 16 bit. he was wrong
    then too.

    imperceptible means there's a loss. he just claims he can't see it.

    however, why do a lossy step, especially early on in the workflow? bad
    idea. that's why converting to jpeg is best done at the end, not the
    beginning.

    the key is that working in lab is not as big of a deal as is claimed
    and nearly all of the time you can do it in rgb. the main advatage of
    lab is you can operate on the luminance channel without causing a
    colour cast, but that can almost always be done with a luminosity blend
    mode and avoid the double conversion entirely.
    it is, but photoshop doesn't work the way you think it does.
    yes it does.
     
    Guest, Apr 18, 2014
  7. Jeffery Small

    Guest Guest

    that doesn't mean what i did before was ineffective. that's nothing but
    a straw man.

    before lightroom, my workflow was the best it could be at the time,
    given what was available.

    after lightroom, my workflow became more productive.
     
    Guest, Apr 18, 2014
  8. Jeffery Small

    PeterN Guest

    You did by implication, when saying you did low light theater photography.

    Variation on old joke:
    How do you know when nospam is bullshitting?

    Ans: He accuses someone of lying.

    BTW please keep calling me a liar. Simply adding to my case for slander,
    when i find out whou you are.
    Y
     
    PeterN, Apr 18, 2014
  9. Jeffery Small

    PeterN Guest

    All of them?

    careful now it's a trick question.
     
    PeterN, Apr 18, 2014
  10. Jeffery Small

    PeterN Guest

    I have LR4, classroom in a book. It was obsolete when I got it, but
    still helpful.
     
    PeterN, Apr 18, 2014
  11. Jeffery Small

    PeterN Guest

    While it's rare that one can be certain what he's referring to: my vote
    would be converting the image to LAB & back to RGB. Two or three quick
    keystrokes in each direction.
     
    PeterN, Apr 18, 2014
  12. Jeffery Small

    PeterN Guest

    On 4/17/2014 9:12 PM, nospam wrote:

    I completely agree. However, I don't go to her lectures ot be
    entertained. She is one of the most knowledgeable Photoshop artists and
    lecturers around. I have gone to several of her PS lectures &
    workshops, and learned something new at each one.
    I have a standing deal with her. Take her and her husband out for a
    round of golf, and I get at least one Photoshop tip for each hole.
     
    PeterN, Apr 18, 2014
  13. Jeffery Small

    PeterN Guest

    All of which is meaningless.simply put:
    the LAB color space is larger than RGB. Conversion ot RGB is loseless.
    Conversion from LAB to RGB may not be b looseness, but for pictorial
    photography purposes, you will not notice any loss. Try it 10 times and
    ost the results. Let the readers try it and see ifthey can see any
    difference.
     
    PeterN, Apr 18, 2014
  14. Jeffery Small

    PeterN Guest


    It's not a color conversion. It's a conversion from one color space to
    another.
     
    PeterN, Apr 18, 2014
  15. Jeffery Small

    Guest Guest

    bullshit. there is no such implication whatsofuckingever.

    where in the world do you come up with that idiocy anyway?

    just because someone does theatre photography does not mean they did so
    by sneaking in a camera, got caught and then told not to take photos,
    which is what you're saying i did. you're just showing just how much of
    an asshole you truly are (not that there was much doubt).

    when i shoot theatre it's almost always at dress rehearsals and i
    usually know the people involved with putting on the performances
    and/or the performers themselves.

    claiming that i do that without permission is a flat out lie.
    i only accuse someone of lying when they are lying, which is what you
    have done here, have done in the past and will no doubt continue to do.
    you might want to rethink that, because you just said i took
    unauthorized photos, which is a flat out lie.

    you aren't going to get very far with your bogus lawsuit by lying (not
    that you would get far even if you didn't).
     
    Guest, Apr 18, 2014
  16. Jeffery Small

    Guest Guest

    only an idiot would not understand what i'm referring to, and it has
    nothing to do with the number of keystrokes either.
     
    Guest, Apr 18, 2014
  17. Jeffery Small

    Guest Guest

    i didn't go to be entertained. i went to a session of hers at photoplus
    some years back. that's also where i met martin evening too.
     
    Guest, Apr 18, 2014
  18. Jeffery Small

    Guest Guest

    it's not meaningless and there is a loss in *either* direction.

    you might not care but others do.
     
    Guest, Apr 18, 2014
  19. Jeffery Small

    Guest Guest

    make up your mind.
     
    Guest, Apr 18, 2014
  20. Jeffery Small

    Tony Cooper Guest

    Good to see you examining a word to see if it fits. Go a little
    further, though.

    Intention: a thing intended; an aim or plan.

    Now look up "proven". "I've come to this conclusion" is not the
    definition.

    I don't plan to challenge nospam. I let pass any posts in which he
    doesn't say anything I disagree with.
    Context rules.
    Context rules.
    You said it.
     
    Tony Cooper, Apr 18, 2014
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