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MotoTakashi
Participant
October 29, 2018
Answered

Photoshopのカラーピッカーで、色指定をRGB(16,16,16)で指定するには???

  • October 29, 2018
  • 1 reply
  • 1051 views

どうぞ、お助け下さい。

現在、正確な色指定を行いながら、カラーパターンを作成しなければなりません。

そこで質問ですが、私の現在の設定では、Photoshopのカラーピッカーで、RGBで色指定をすると、RGB(8,8,8)なため、RGB(0,0,0)~RGB(255,255,255)でしか色の指定ができません。どこの設定を変更すると、RGB(16,16,16)で、RGB(0,0,0)~RGB(65535,65535,65535)で色指定が可能になるのでしょうか?

よろしくお願いします。

    This topic has been closed for replies.
    Correct answer davescm

    Hi

    The forum translater has not donme a great job with your post but I will try and pick up on the issues.

    1. When working in 8 bit or 16 bit modes the colour picker in Photoshop only allows numeric entry of 8 bit values.  (the 32 bit mode color picker is different)

    2. Photoshop uses 15 bits +1 , although for normal work that makes no visible difference

    3. Exact color can only be specified when the RGB numbers are associated with a specific color profile. So for example RGB43,47,56 represents a different colour in sRGB to the same numbers in Adobe RGB or the same numbers in Prophoto.

    Whilst 16 bit has definite advantages in avoiding processing artifacts due to rounding errors when working in 8 bit, I am interested as to why you need to enter colours with more than 8 bit precision. Maintaining that precision throughout the processing chain e.g conversion to monitor  or conversion to printing will be all but impossible.

    Dave

    1 reply

    davescm
    Community Expert
    davescmCommunity ExpertCorrect answer
    Community Expert
    October 29, 2018

    Hi

    The forum translater has not donme a great job with your post but I will try and pick up on the issues.

    1. When working in 8 bit or 16 bit modes the colour picker in Photoshop only allows numeric entry of 8 bit values.  (the 32 bit mode color picker is different)

    2. Photoshop uses 15 bits +1 , although for normal work that makes no visible difference

    3. Exact color can only be specified when the RGB numbers are associated with a specific color profile. So for example RGB43,47,56 represents a different colour in sRGB to the same numbers in Adobe RGB or the same numbers in Prophoto.

    Whilst 16 bit has definite advantages in avoiding processing artifacts due to rounding errors when working in 8 bit, I am interested as to why you need to enter colours with more than 8 bit precision. Maintaining that precision throughout the processing chain e.g conversion to monitor  or conversion to printing will be all but impossible.

    Dave

    M
    MotoTakashiAuthor
    Participant
    October 30, 2018

    Thank you! 

    あなたの詳しい回答で、何となく理解できたような気がします。実はUHD-TVの12bit ColorBarsを作成していました。仕様書は12bit-number Colorが指定されています。私は、rather   the 12bit Color number convert to 8bit scale down  than convert to 16bit scale upの方が、良いんじゃないか・・と考えた訳です。

    どうもありがとう!

    32bit カラーピッカーは、全く使い方が分からない !!! 始めて見ました!!

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