Pixel subtraction / dark frame subtraction

[LawrenceM]

Hi

 

I"m currently evaluating affinity photo to see if it will suit our needs

 

Is it possible to do a dark frame subtraction / image subtraction in Affinitiy photo?

 

https://en.wikipedia.org/wiki/Image_subtraction

 

Thanks for your assistance

Lawrence

 

[stokerg]

Hi LawrenceM and Welcome to the Forums,

 

This isn't something we can do.  I've just had the process explained to me and it's something that's normally carried out before the image has been demosaiced.  There a several tutorials online which show a way to mimic the effect by putting the dark frame on a layer above the image and then set the blend mode to Subtract, however this won't give the same results as a true dark frame subtraction, but may be worth a try in Affinity to see if that gives the effect you are after.

 

I certainly recommend putting a post in our Feature Requests section of the forums here as it would be great feature if we could add it.