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benj_v
Known Participant
February 16, 2017
Answered

Camera Raw rendering vs Photoshop

  • February 16, 2017
  • 3 replies
  • 3644 views

Hello,

My blacks in Camera Raw are crushed, while in photoshop not.

If i open a raw in Camera Raw, and open it in Photoshop without changing settings , the blacks in Camera Raw were crushed, and in photoshop, it's normal.

When i look the raw in bridge, blacks are fines too.

Why my camera raw crushes the black ? (and some red tones too in the strong shadows) ?

    This topic has been closed for replies.
    Correct answer D Fosse

    my calibration is sRGB gamma 2.2 D65 v2 matrice in i1Profiler on windows 10

    my calibration is sRGB gamma 2.2 D65 v2 gamma curve in colornavigator

    the problem still occurs


    OK, then uncheck GPU from both apps' preferences and try again.

    As long as the conversion from source/document profile into a valid monitor profile is correctly executed, there cannot be a difference between them. They should both display, simply, correctly.

    So that conversion isn't performed correctly. With the GPU enabled, the conversion is done by the video driver. Off, it's done by the CPU. The latter is the traditional way, and is usually more reliable.

    A potential source for errors here is that the source profile in ACR is linear TRC ProPhoto, in Photoshop it's sRGB/Adobe RGB/1.8 ProPhoto. So while they should both end up identically in monitor color space, the fact is that we have two different conversions, two different calculations. A problem may show up in only one of them.

    3 replies

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    benj_vAuthor
    Known Participant
    April 10, 2017

    Hello,

    I finally found the problem :

    While putting rendering intent to "relative" (default option in ps color settings ?), i get strange lights, and red in the shadows while opening some raw (raw adobe98, PS srgb), and with "perceptual" rendering intent option, all si finally fine !

    normal lights, normal colors.

    I tried a lot of calibrations with different mode etc... Always the same, all the calibration (v4.2, v2.2, gamma, lut, curve etc) works fine with "perceptual" in PS. But are wrong with "relative".

    D Fosse
    Community Expert
    D FosseCommunity Expert
    Community Expert
    April 10, 2017

    Well, that just has to be an obscure bug. The fact is that standard working color spaces don't even support perceptual intent. Whatever you set in Photoshop, all you ever get is relative colorimetric.

    You should by definition not get any differences between those two.

    I think you need to show in detail what it is you're doing here.

    D Fosse
    Community Expert
    D FosseCommunity Expert
    Community Expert
    February 17, 2017

    Oh, one more thing - is this a dual display setup? In that case make sure that the right profile is really used for each display. ACR is known to occasionally use the wrong profile (for as of yet unknown reasons).

    JJMack
    Community Expert
    JJMackCommunity Expert
    Community Expert
    February 16, 2017

    I have trouble understanding what your mean.  Where  do you see the colors different.  Photoshop can not process RAW files it uses the ACR Plug-in to convert the RAW data into and RGB image that can be opened as a smart object layer or a raster layer.

    JJMack
    B
    benj_vAuthor
    Known Participant
    February 16, 2017

    1) I open photoshop

    2) I open a raw (and it launch Camera Raw so)

    3) I can see the blacks crushed in camera raw. I open my I do "open" / "open as smart object"

    4) In Photoshop, Black are normal, not clipped

    5) I open the Raw in Bridge

    6) I press space-barre to load the image in full screen (the raw loads to it's full quality), and black are normal not clipped.

    7) I right click (still in Bridge) and "open in camera raw"?

    8) black are clipped in Camera Raw

    So, if i open a raw in Camera Raw, from Bridge, or from Photoshop, blacks are clipped.

    JJMack
    Community Expert
    JJMackCommunity Expert
    Community Expert
    February 16, 2017

    There does seem to be a differences in color on my machine too.  The colors in ACR seems more vivid or saturated.  But then I'm bit colorblind my displays are not the best and only calibrated via test web images use for calibration.  I'm not too obsessed with color as others and can always adjust colors to my liking.   In my mind many are too obsessed with colors and calibration I rather concentrate on printing image I like.

    JJMack
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