flying_chair Posted April 19, 2019 Share Posted April 19, 2019 Hi there I have 3 b&w versions of an image, each taken through a red, green, or blue filter. I have gotten to the stage where I have isolated the RGB channels. This is what it looks like so far: However, I am unable to combine the layers in such a way that a colourful end image is produced. This is what the result looks like: Could anyone please help me to produce a colour image? I am trying to emulate what Sergey Prokudin-Gorsky did. Quote Link to comment Share on other sites More sharing options...
toe_head2001 Posted April 19, 2019 Share Posted April 19, 2019 https://forums.getpaint.net/topic/113646-rgb-compositor-v10-jan-6-2019/ Quote (September 25th, 2023) Sorry about any broken images in my posts. I am aware of the issue. My Gallery | My Plugin Pack Layman's Guide to CodeLab Link to comment Share on other sites More sharing options...
flying_chair Posted April 19, 2019 Author Share Posted April 19, 2019 I am very stupid and forgot to invert the colours Quote Link to comment Share on other sites More sharing options...
toe_head2001 Posted April 19, 2019 Share Posted April 19, 2019 Why would you invert the colors for an RGB composition? Quote (September 25th, 2023) Sorry about any broken images in my posts. I am aware of the issue. My Gallery | My Plugin Pack Layman's Guide to CodeLab Link to comment Share on other sites More sharing options...
Reptillian Posted April 19, 2019 Share Posted April 19, 2019 You can set blend modes to addition. Quote G'MIC Filter Developer I am away from this forum for undetermined amount of time: If you really need anything related to my PDN plugin or my G'MIC filter within G'MIC plugin, then you can contact me via Paint.NET discord, and mention me. Link to comment Share on other sites More sharing options...
HyReZ Posted April 20, 2019 Share Posted April 20, 2019 (edited) 1 hour ago, toe_head2001 said: Why would you invert the colors for an RGB composition? RGB has to be inverted to its complements of Cyan,Yellow, and Magenta Edited April 20, 2019 by HyReZ Quote Link to comment Share on other sites More sharing options...
toe_head2001 Posted April 20, 2019 Share Posted April 20, 2019 1 hour ago, HyReZ said: RGB has to be inverted to its complements of Cyan,Yellow, and Magenta To do what? Why would you invert the colors for an RGB composition? 1 Quote (September 25th, 2023) Sorry about any broken images in my posts. I am aware of the issue. My Gallery | My Plugin Pack Layman's Guide to CodeLab Link to comment Share on other sites More sharing options...
HyReZ Posted April 20, 2019 Share Posted April 20, 2019 (edited) Oops! I think that in using the gray-scale to RBG example; that flying_chair presented; adding 50 to 66% transparency to each layer before merging to a single layer and then turn the opacity of the single layer up to 100% is the solution. I hope that you have save to a PDN so that you can test this. I must admit that I have not tested this.Sergey Prokudin-Gorsky was using transparencies also, but his was photographic film transparencies. Edited April 20, 2019 by HyReZ Quote Link to comment Share on other sites More sharing options...
flying_chair Posted April 20, 2019 Author Share Posted April 20, 2019 I was doing this with scanned negatives, and had to invert the negatives in order to get the actual picture Quote Link to comment Share on other sites More sharing options...
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