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dfghdfhdfhdvn
Participant
January 28, 2018
해결됨

1px hairline in Photoshop after scaling a selection (feather is set to 0px)

  • January 28, 2018
  • 1 답변
  • 1128 조회

After some upgrade of Photoshop CC (from PS CC 2017 to 2018 I guess) I noticed 1px hairline on images after scaling a selection. Anti-aliasing is turned off for selection borders and Feather is set to 0px as on the screenshot below. The first image is just a selection. After scaling selection down by squeezing from the top (Edit > Transform > Scale) a 1px hairline appears right on the bottom border of the selection. Obviously it can be edited, but if the file is big and has lots of details it could take a while. Also PS CC 2015/2016/2017 wasn't doing that until relatively recent time as I was using this tool before without any issues. Any settings can be changes to restore the original behaviour?

Cropping is not an option. This image was selected just to show the issue - hairline against plain background. I was using scaling of a selection a lot before in architecture photography to correct visual appearance of top part of buildings after perspective correction. Also there shouldn't be any artifacts as the image has the same pixel color on both sides of the selection. It was introduced in PS just recently and since then scaling of a selection became pretty much unusable.

    이 주제는 답변이 닫혔습니다.
    최고의 답변: Semaphoric

    This has been an issue in Photoshop as long as I can remember. It has to do with the algorithm Photoshop uses to scale rectangular areas.You can prevent it by setting the interpolation to Nearest Neighbor, or if not that, making sure that you are scaling by a whole number of pixels (in the W and H fields of the Option Bar).

    1 답변

    Semaphoric
    Community Expert
    SemaphoricCommunity Expert답변
    Community Expert
    January 29, 2018

    This has been an issue in Photoshop as long as I can remember. It has to do with the algorithm Photoshop uses to scale rectangular areas.You can prevent it by setting the interpolation to Nearest Neighbor, or if not that, making sure that you are scaling by a whole number of pixels (in the W and H fields of the Option Bar).

      D
      dfghdfhdfhdvn작성자
      Participant
      January 29, 2018

      Looks like that was the case. The default scaling option (under Edit > Transform > Scale) was changed from Nearest Neighbor to Bicubic at some stage. After changing it back scaling is perfect again. Thanks a lot, Semaphoric​!

      D Fosse
      Community Expert
      D FosseCommunity Expert
      Community Expert
      January 29, 2018

      Yep, been around forever.

      My workaround is to select > copy to a new layer > transform > merge down.

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