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keen91

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  1. Thanks
    keen91 reacted to NotMyFault in How to separate / extract the difference of 2 nearly similar stacked photos (German or English)   
    I use these method every day to spot / emphasize differences. It takes less than 30 seconds and is extremely powerful.
    I love that the forum users normally are very supportive, diverse, and inclusive. It is a matter of personal preferences. I’m far more on the “technical” than the creative side, but sometimes can get very creative for technical solutions 😉
    Unfortunately, the example by OP is not suitable for this method, as lightning and perspective doesn’t match / differ too much (greyscale increases the problem)
    You can see the issue if you activate/deactivate the mask layer in the attached file.
    But one unsuitable example is no proof that the method doesn’t work in other situations.
     
    difference counter example.afphoto
  2. Thanks
    keen91 reacted to NotMyFault in How to separate / extract the difference of 2 nearly similar stacked photos (German or English)   
    I like this idea, even if others think it’s over complicated.
    The simplest method is to stack both images atop each other (must be perfectly aligned).
    the set the blend mode to “difference”.
    Identical parts (pixel colors) will become pure black. All other stay non-black (unless there were black)
    Use a level adjustment to get get pure black / white image. Rasterize to mask. 
  3. Thanks
    keen91 reacted to Jens Krebs in How to separate / extract the difference of 2 nearly similar stacked photos (German or English)   
    If you take the pictures yourself, use ansingle colour background ... the pattern on your sample makes it tough to use any automation or filters, because the colour of the coffee and the colour of the cup are both somewhere in the background as well.
    Ideally the background is one single colour that is not repeated on the motive (similar to a green screen in filming).
    Otherwise cutting out objects is always a bit of a fiddle.
  4. Thanks
    keen91 reacted to John Rostron in How to separate / extract the difference of 2 nearly similar stacked photos (German or English)   
    In the example you give, you don't need any blending options. If you have a different subject/background, then you should try various other options, perhaps starting with Difference. You should be looking for a blending mode that makes the boundary of the subject the clearest. That will very much depend on the subject and background.
    John
  5. Thanks
    keen91 reacted to carl123 in Beat way to get a partial „ motion blur effect“ in affinity   
    The Live Motion Blur filter has an inbuilt mask so you can apply the blur to the whole train, then paint in black on part of the motion blur layer to remove where you don't want the blur to appear
  6. Thanks
    keen91 reacted to v_kyr in Beat way to get a partial „ motion blur effect“ in affinity   
    See:
    How To FAKE MOTION Using Blur Filters In Affinity Photo (video) Natural Locus Motion Blur (video) Motion Blur Filter in APh (video) Blur Filters Explained - Part 01 (video) ... etc.  
  7. Thanks
    keen91 reacted to Komatös in How to separate / extract the difference of 2 nearly similar stacked photos (German or English)   
    That doesn't make any sense. Why do you always have to make something simple complicated? Take the selection brush and mask the cup. Then create a mask from the selection and that's it.
    The pictures are not only different because of the additional object. The object also changes the brightness of the background.
    You can check this yourself if you superimpose the two pictures and then try them with the blending options.
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