dmstraker Posted April 5, 2017 Share Posted April 5, 2017 I wanted to enhance dark lines in an architectural image, so needed a layer with only outlines and otherwise transparent. Here's what I did. Duplicate background Detect edges Adjustment layer: Black/white, Merge Layer/Invert Adjustment layer: Levels black 50%, Merge Filters/Colours/Erase White Paper Opacity to suit. (Yes, I could Blend Mode: Darken rather than erase white paper, but having just the lines gives a bit more flexibility). Is there a better way? CircularWebs 1 Quote Dave Straker Cameras: Sony A7R2, RX100V Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11" Favourite word: Aha. For me and for others. Link to comment Share on other sites More sharing options...
anon1 Posted April 5, 2017 Share Posted April 5, 2017 - Quote Link to comment Share on other sites More sharing options...
dmstraker Posted April 6, 2017 Author Share Posted April 6, 2017 Thanks, MBd! I'm still a beginner, really. Happy to share experiments but not be authoritative. I'll have a go with curves. I did try blend ranges with no improvement in the images with which I used this, but it is indeed a powerful option. I tried Gaussian blur but not min/max/others - I'll experiment with these. Quote Dave Straker Cameras: Sony A7R2, RX100V Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11" Favourite word: Aha. For me and for others. Link to comment Share on other sites More sharing options...
anon1 Posted April 6, 2017 Share Posted April 6, 2017 - CircularWebs 1 Quote Link to comment Share on other sites More sharing options...
dmstraker Posted April 6, 2017 Author Share Posted April 6, 2017 Interesting principle about priors. And the general notion of how to know which are the "right" edges. Like if you divided the image into little squares, then isolated those with the widest lines running through them. Or only chose lines of greater length or width. Hmm. Quote Dave Straker Cameras: Sony A7R2, RX100V Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11" Favourite word: Aha. For me and for others. Link to comment Share on other sites More sharing options...
Genamr Posted April 18, 2017 Share Posted April 18, 2017 you can use the Gaussian or Motion blur effects to blend two photos together. Or, you can simplyerase the parts/edges of the photo with the Eraser Tool using a soft brush. Quote Link to comment Share on other sites More sharing options...
verysame Posted April 18, 2017 Share Posted April 18, 2017 I wanted to enhance dark lines in an architectural image, so needed a layer with only outlines and otherwise transparent. Here's what I did. Duplicate background Detect edges Adjustment layer: Black/white, Merge Layer/Invert Adjustment layer: Levels black 50%, Merge Filters/Colours/Erase White Paper Opacity to suit. (Yes, I could Blend Mode: Darken rather than erase white paper, but having just the lines gives a bit more flexibility). Is there a better way? Another option to play with, a little less destructive. After Black/White, Merge try this: Channels, pick anything, R, G, or B, right click then Create Mask Layer Duplicate the background layer with the architecture Add the mask layer to the duplicated background Nest a curve adjustment to the duplicated background Tweak the curve For instance, you can tweak contrast and color with just the curve. You can also add a second curve to fine tune the mask with the edge previously detected (an RGB curve, then pick Alpha from the drop-down menu). By doing so, you don't need to commit any step of your work and you can keep editing. Quote Andrew - Win10 x64 AMD Threadripper 1950x, 64GB, 512GB M.2 PCIe NVMe SSD + 2TB, dual GTX 1080ti Dual Monitor Dell Ultra HD 4k P2715Q 27-Inch Link to comment Share on other sites More sharing options...
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