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Beachcolonist
Beachcolonist
Inspiring
February 9, 2019
해결됨

Which magnifications in Photoshop are interpolation-free?

  • February 9, 2019
  • 4 답변들
  • 1204 조회

It used to be (as I best recall) that only 50% & 100% magnifications were "interpolation-free" (perhaps not the exact term) in Photoshop. Other magnifications were "interpolated" for monitor display, ie not true to the file. That is, if you wished to check actual sharpness, you needed to do so at either 50% or 100%. Presuming this was the case, is it still true? Any other thoughts on the subject? PS if this question could be better placed in this forum, please let me know and I will move it.

이 주제는 답변이 닫혔습니다.
최고의 답변: davescm

Simple answer is 100%. That maps 1 image pixel to 1 screen pixel.

Anything else has to combine image pixels (less than 100%) or calculate in between pixels (greater than 100%)

Dave

4 답변

D Fosse
Community Expert
D FosseCommunity Expert
Community Expert
February 9, 2019

Question: Which magnifications in Photoshop are interpolation-free? Answer: 100%.

End of story. Time to move on.

    Beachcolonist
    Beachcolonist작성자
    Inspiring
    February 9, 2019

    I might have helped make replies concise by noting I don't need suggestions on keyboard shortcuts, and am only interested in the very precise information that directly addresses the issue and not spurious guesswork that includes questionable points such as this "grey edge" notion, that I have never witnessed, not once, in many years of editing.

    To help you understand, I would reiterate the question: It used to be that ONLY 50 + 100% gave true rendering, not the other "stepped" magnifications. You including them is a distraction and not helpful. It seems  that one cannot post a question here without replies assuming that the questioner is a novice. Perhaps the managers of this forum should peel off an area where novices can flub around so that replies are more better organized. Thanks please do not reply!

    JJMack
    Community Expert
    JJMackCommunity Expert
    Community Expert
    February 9, 2019

    Beachcolonist  wrote

    I would reiterate the question: It used to be that ONLY 50 + 100% gave true rendering, not the other "stepped" magnifications.

    That is something in your head.

    True rendering is only at 100%. and only at you display ppi resolution and color

    You have been told by myself and others the only time you are see your  actual image images pixels is when your are zoomed to 100% at any other magnification or shrinkage you are not viewing your image you are viewing a scaled version of your image. This has been the case  since day one. For some unknown reason you fail to comprehend this.

    JJMack
      Beachcolonist
      Beachcolonist작성자
      Inspiring
      February 9, 2019

      You told me nothing, you rambled. Now you get wise, after I asked you to please not reply. Please keep your ego out of my inquiries in the future.

      davescm
      Community Expert
      davescmCommunity Expert답변
      Community Expert
      February 9, 2019

      Simple answer is 100%. That maps 1 image pixel to 1 screen pixel.

      Anything else has to combine image pixels (less than 100%) or calculate in between pixels (greater than 100%)

      Dave

        davescm
        Community Expert
        davescmCommunity Expert
        Community Expert
        February 9, 2019

        There is also another factor that comes into play when zoomed out. That is with zoom levels less than 66.7%  the preview on screen is composited at 8 bits/channel even if the image is 16 bits/channel. On some images that is very visible. so that is another reason, aside from interpolation, to view critically at 100% zoom.

        Dave

          Beachcolonist
          Beachcolonist작성자
          Inspiring
          February 9, 2019

          Very useful makes sense all around thank you.

          Background: I believe I gathered this idea about both 50% & 100% being "accurate" from Deke McClelland, the trainer in the Lynda series of educational training for the software. I don't know of a better source.

          Ongoing: You skirted any opinion on the 50% idea, and I see why as you use as a baseline "one to one mapping." That's well founded.

          Conclusion (so far): I'm not however satisfied with your review for my own needs, as that memory of McClelland stands in my mind and I have a very good memory. He's the best I have every seen with the software. I am going to do the legwork to finish up the question, as it stands I would say there can be no arguing about 100%, I just need to discover what he might have meant about 50%, perhaps it relates to printing output, this will bug me, I will let you know.

          JJMack
          Community Expert
          JJMackCommunity Expert
          Community Expert
          February 9, 2019

          If you are referring to Photoshop zooming its a quick scaling of the image for you viewing pleasure the image is not change at all.  Also at some zoom percentages the quick scaling is not all that good do not judge your image quality at any zoom percentage other the 100% where you see your actual images pixels. Zooming is done quickly  so Photoshop is responsive the the scaling is not done for image quality that would slow down Photoshop some.

          JJMack
            Beachcolonist
            Beachcolonist작성자
            Inspiring
            February 9, 2019

            This is rather poorly composed amateur information that might help novices get a feel for the generalities of the program. It is of no help otherwise.

            Thanks, I know your heart is in the right place, but please do not reply to my questions, I find soft answers create a mess in a conversation.

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