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alena_upol
alena_upol
Participant
January 17, 2019
Answered

interpolation and croping

  • January 17, 2019
  • 3 replies
  • 2242 views

Hello,

I have two questions regarding Camera raw:

1) Which interpolation is used during image export in Camera Raw when I use "resize" in the export dialog? Photoshop has few interpolation methods but this is not defined in Camera Raw.

2) Photoshop has two different modes for croping the image - a) I can move with the box through the image (classic mode), b) I can move with the image and the crop box is fixed. Lightroom has only the second one possibility. I did not find this second possibility in the Camera Raw. There is only classic mode. Is it possible to change it?

Thank you

Alena

    This topic has been closed for replies.
    Correct answer JJMack

    Then always use  Adobe Plug-in script Fit Image It does use bicubic.

    If you want to choose a differen interpolation method download and install the Plug-in Script Image Processor Pro.

    3 replies

    alena_upol
    alena_upolAuthor
    Participant
    January 18, 2019

    Thanks guys,

    Resizing is important to me. I like the classic bicubic method in Photoshop. I want to resize all the images at one time based on the long edge of the image (for example, 1920 px Long Edge). I can not do this with "action" in Photoshop with a "classic" image size dialogue. I have to use Lightroom, Camera Raw or "Fit image" in PS. But in all three cases, I can not choose interpolation. That is the reason for my question.

    I'm not talking about the aspect ratio. I'm talking about the interface. Yes, Camera Raw seems to have only the old interface (classic). But it is weird. Lightroom has the new one, PS has both and Camera Raw has the old one...Why? I like the new one.

    D Fosse
    Community Expert
    D FosseCommunity Expert
    Community Expert
    January 18, 2019

    ACR/Lightroom's interpolation cannot be identical to Photoshop's. They are working with raw data and any resizing will be part of the whole demosaicing process and integral to that.

    What they do with RGB files I don't know. But there is generally very little overlap with Photoshop, and the ACR engine has its own adaptive algorithms for just about everything.

    In Photoshop you choose interpolation in Preferences. The Image Size dialog obviously overrides that, but AFAIK anything else without a separate interpolation choice will use it.

    Per Berntsen
    Community Expert
    Per BerntsenCommunity Expert
    Community Expert
    January 17, 2019

    I'm guessing that Camera Raw uses the same algoritms as Lightroom, which according to thedigitaldog​ is an adaptive sharpening algorithm which isn’t found in Photoshop. See Re: Resizing photo results in terrible quality?

    As for the crop tool in Camera Raw, it appears that it only has the "classic" mode. But it also seems to be missing some features that the Lightroom crop tool has, like choosing an aspect ratio. I'm not all that familiar with Camera Raw, I use Lightroom.

    Daniel E Lane
    Daniel E Lane
    Inspiring
    January 17, 2019

    You can choose an aspect ratio to your crop in Camera Raw rather easily. Just click and hold on the Crop Tool Icon on the top tool bar. You get the typical presets as well as the custom crop option. Remember, Lightroom is following Camera Raw, not the other way around. The creation of Lightroom was them essentially taking Camera Raw and Bridge and combining them into one application. So all of those updates go through Camera Raw first, then they trickle down to Lightroom shortly there after.

    D Fosse
    Community Expert
    D FosseCommunity Expert
    Community Expert
    January 18, 2019

    https://forums.adobe.com/people/Daniel+E+Lane  wrote

    The creation of Lightroom was them essentially taking Camera Raw and Bridge and combining them into one application.

    You apparently have not used Lightroom. It has nothing whatsoever in common with Bridge.

    The ACR engine is identical and updates do not "go through" ACR first. All updates are released simultaneously - they have to be, because of Lightroom/Photoshop integration.

    There are, however, small differences in the UI, adapted to each application's normal workflow. Lightroom is designed for high-speed, high volume throughput, ACR is designed for one image at a time.

    JJMack
    Community Expert
    JJMackCommunity Expert
    Community Expert
    January 17, 2019

    I do not see any Adobe Camera Raw interpolation method settings.   It may have it own interpolation method it could also possibly use your interpolation Preference you set in your Photoshop preferences.   I do not use Lightroom so I doe not know if it has any  interpolation method setting.

    Photoshop has more than two methods of cropping there are different crop tool methods new and old interfaces. The perspective crop tools methods and there is  Image  crop which will crop to the bounds of a selection.

    In camera raw there are a few presets and some options and you add your custom aspect ratio.

     

    JJMack
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