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17 comments

  • Ian Wilson
    Moderator
    Top Commenter
    Hi Frans

    Can you say a bit more about what you want to do?

    Ian
    0
  • NNN635258924859907661
    Hi Ian

    I want to remove the background of an image and make it transparent.
    Like product photos for a webshop.
    I don’t know the right expression for it, in Gimp you do that with Layer > Transparency > Add Alpha Channel.
    Free standing image?

    Frans
    0
  • cdc
    Capture One is not capable of that type of work.
    0
  • SFA
    NNN635258924859907661 wrote:
    Hi Ian

    I want to remove the background of an image and make it transparent.
    Like product photos for a webshop.
    I don’t know the right expression for it, in Gimp you do that with Layer > Transparency > Add Alpha Channel.
    Free standing image?

    Frans


    If you want to cut the subject image out of the background and replace the background with something else than as already said C1 is not your best choice.

    However, if you are a shooting product against a white or dark background and you just want to make the background disappear to white or black (or possibly grey or some other her colour assuming the existing background is reasonably consistent already) then there are possibilities using C1.

    Grant
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  • NNN635258924859907661
    Hi Grant,

    Can you tell me how?
    TIA!
    Frans
    0
  • SFA
    NNN635258924859907661 wrote:
    Hi Grant,

    Can you tell me how?
    TIA!
    Frans


    I'm sure this came up on a webinar or tutorial I saw just a few weeks ago so I went looking for it but I have not found what I was looking for yet. I will try to find it because it explains everything and is easy to follow.

    If I fail I will write up some ideas that can be used.


    Grant
    0
  • SFA
    Not exactly what I was looking for but this article (and the video) covers some of the principles and the tools available.

    https://blog.phaseone.com/achieving-per ... pture-one/

    Note, for example, how the background is altered.

    If you are seeking an entirely white or an entirely black background and you can easily separate the subject from the background by simply selecting black or white in the image then you could make and exposure, levels or curves adjustment to whiten or blacken and that might be enough.

    Also true is you are dealing with an easily identifiable and separate background colour (the Green or Blue screen concept).

    If you are working with colours that are not easily separated then you are very likely to need masks.

    I don't think it was mentioned in the video but you can create a mask from a colour (range) selection (the green screen idea but with greater flexibility possible) as a starting point if it could be more suitable than just drawing a mask.

    The concepts of the skin tone tab tools in the colour editor can be applied to any colour not just skin tones. So Uniformity and Smoothness can be used to smooth almost consistently coloured backgrounds too.

    Of course if you really want to change the background to something else - a completely different colour perhaps - it may be possible with multiple layers and some stepped changes but whether it makes sense to to it that way rather than head to a graphics editor tool may be open to question.

    HTH.


    Grant
    0
  • cdc
    The only way I know of would be to make a layer and mask the product/subject, then blow out or darken the background with various levels, curves, exposure adjustments.

    Capture One does not offer luminosity masks so I prefer Lightroom for this type of work because it can be somewhat automated. That said in Capture I would manually mask the product then use refine mask, or you could try using the color editor to select the product/subject (assuming it is color), and then create a mask from the color selection.
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  • cdc
    SFA wrote:

    If you are seeking an entirely white or an entirely black background and you can easily separate the subject from the background by simply selecting black or white in the image then you could make and exposure, levels or curves adjustment to whiten or blacken and that might be enough.


    How do you select black, white, or grey in Capture One?
    0
  • NNN635258924859907661
    Essential for me is that I can use Copy / Apply adjustments for the other images (360 sequence)
    Even with “Edit with..†that’s not possible.
    I am afraid that will be a problem also because of the different outlines of the object.

    Nevertheless the answers are very useful for me in other cases.
    Thanks!

    Frans
    0
  • SFA
    NNN635258924859907661 wrote:
    Essential for me is that I can use Copy / Apply adjustments for the other images (360 sequence)
    Even with “Edit with..†that’s not possible.
    I am afraid that will be a problem also because of the different outlines of the object.

    Nevertheless the answers are very useful for me in other cases.
    Thanks!

    Frans


    Frans,

    Does your subject move in the frame between shots?

    Move a lot?

    If you are shooting product for focus stacking then any mask framing is likely to be quite accurate. If not you may have other detail matters to resolve.

    If you are shooting portraits or fashion then a background may be quite consistent in terms of a treatment that works but the masking may not - unless you have colour separation like a green screen.

    However I suspect that you may be shooting something for stitching in which case you probably have far too many variables, frame by frame, make use of colour selections or masks on a copy basis.

    At this point it would be useful to better understand what you need to achieve.

    Where does "Edit with..." come into the process?


    Grant
    0
  • NNN635258924859907661
    Hi Grant,
    No not for stitching, but on a turntable a 360 picture consisting of e.g. 36 pictures.
    I hoped that in CO you could select and change a color without masking.

    So I think alpha channel is not possible either?

    “Edit with…†is not usable because you cannot Copy / Apply for the other 35 images.


    SFA I am a novice. Can you explain your black & white solution?

    TIA
    Frans
    0
  • SFA
    Hi Frans,

    If your background is intended to be all white or all black and is somewhere close to the colour values required you may be able to set the values to all white or all black by using the levels tool or the curve tool.

    Using a turntable I would imagine you have good control over background and foreground exposure - good enough to be able to set a value that would make a solid white or black possible with values copied from one image to another.

    IF, and this is probably a VERY BIG IF, the background and foreground have no common colour with anything in the subject matter it may be possible to select based on their colour (pure white will not work but something close to that might ) using the Advance Colour Editor tool tab and use the selection to create a mask in a layer. And of course if it can to THAT (useful because masking offers more ways to to see exactly were the colour selection is active) then you might be able to apply a colour adjustment without a mask and still be able to copy it to all images.

    If you are familiar with the idea of green screen shooting this is very similar indeed a plain screen background of a colour that does not exist in the main subject might work well.

    If there is no such clean separation then you would need to mask each image separately. However, depending on your subject matter, you may be able to make one image with a crop that will be quite close to being OK for all of the them. If so you can minimise the work required by copying the layer with the mask from the first image to all of the others and maybe that would result in minimal adjustments for the other images.

    If the main subject is complex, to the point where every mask required is very different to the others then I would imagine you have some work to do no matter which tools you use. Or maybe the green/blue/whatever screen background concept would be an approach worth considering.

    If you really want to change the background for something from a different image the answer is a little simpler - no, C1 does not do that sort of editing at the time of writing. So at some point you will need to send the file to another application for that part of the processing.

    I think we may have gone as far as we can with words - a sample image to demonstrate with (if the suggestions apply) would probably be useful if you have one you can share.

    HTH.


    Grant
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  • cdc
    NNN635258924859907661 wrote:
    Hi Grant,
    I hoped that in CO you could select and change a color without masking.


    Color you can change without masking using the color editor, though the range which you can shift hue won't be as wide using photoshop.

    White/grey/black you can not change without masking unless it is a global adjustment, as Grant mentioned.
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  • SFA
    cdc wrote:
    NNN635258924859907661 wrote:
    Hi Grant,
    I hoped that in CO you could select and change a color without masking.


    Color you can change without masking using the color editor, though the range which you can shift hue won't be as wide using photoshop.

    White/grey/black you can not change without masking unless it is a global adjustment, as Grant mentioned.


    You can to a limited degree change black and white IF the main part of the subject will stand the change.

    For example if you have a mainly black background but it is a bit uneven and you want to make it consistent there is a reasonable change that, provided the main subject has no large area of darkness with detail that has to be retained, you could get away with making the darkest darks darker and those just a little above dark hold their position or maybe go a little lighter with a curve. Whites the same but that might be more difficult.

    The Advance Colour tab in the Colour Editor can be tweaked to obtain a 30 degree hue adjustment (on the 360 degree colour wheel) for each adjustment. You can stack the adjustments and can stack more than 6 adjustments. That means you can go over 180 degrees in either direction so, in theory with a bit of care and some luck, you can change something with a decent amount of colour to another colour.

    In reality it would probably be better to have a workflow that includes a different application with dedicated tools for such a change. But it can be done and may work quite well for some images.


    Grant
    0
  • cdc
    SFA wrote:

    You can to a limited degree change black and white IF the main part of the subject will stand the change.


    That is what I was referring to when I said global adjustments.

    [url]The Advance Colour tab in the Colour Editor can be tweaked to obtain a 30 degree hue adjustment (on the 360 degree colour wheel) for each adjustment. You can stack the adjustments and can stack more than 6 adjustments. That means you can go over 180 degrees in either direction so, in theory with a bit of care and some luck, you can change something with a decent amount of colour to another colour.

    I never tried that until now, made 12 advanced color selections on the same color with +30 hue on each and sure enough it took the color right around the color wheel and back to itself. So while it is inconvenient, it does work.
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  • NNN635258924859907661
    Hi Grant,
    Thanks for your detailed answer!
    Considering all the IF’s it’s obvious for me that a perfect back and foreground iIs the most important. Working on it.
    C1 will be very useful for cropping (and color adjustments etc. of course)
    If I want to change the back and foreground I have to use another application.

    Thanks to cdc too.

    Very important to know what is NOT possible in C1.
    Have to learn a lot more of C1!
    Thanks
    Frans
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