Ruymura Posted October 27, 2021 Share Posted October 27, 2021 Hello! I'm processing TIFF files generated by VueScan in RAW mode. These TIFFs are negatives with gamma set to 1. After opening, I invert them with "Invert" command, but I cannot set their gamma to 2.2 as the max value in "Levels" dialog is 2. How do I set gamma to 2.2? Quote Link to comment Share on other sites More sharing options...
Lisbon Posted October 28, 2021 Share Posted October 28, 2021 Hi Ruymura Never done this, but i think this is possible with a procedural texture. Affinity Photo: Procedural Texture Nonlinear Transform Correction Changing the gamma from 1.0 to 2.2: Changing the gamma from 2.2 to 1.0: thomaso, carl123 and NotMyFault 3 Quote Link to comment Share on other sites More sharing options...
Ruymura Posted October 29, 2021 Author Share Posted October 29, 2021 On 10/28/2021 at 5:11 PM, Lisbon said: Hi Ruymura Never done this, but i think this is possible with a procedural texture. Affinity Photo: Procedural Texture Nonlinear Transform Correction Thank you, it worked! But I'm disappointed that such a simple action requires so many steps. Lisbon 1 Quote Link to comment Share on other sites More sharing options...
walt.farrell Posted October 29, 2021 Share Posted October 29, 2021 21 minutes ago, Ruymura said: But I'm disappointed that such a simple action requires so many steps. You could make a preset for the PT transform, as James shows, and then apply it using a macro. You could even make that part of a Batch Job processing a group of VueScan files into a usable form. Lisbon and Ruymura 2 Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. iPad: iPad Pro M1, 12.9": iPadOS 17.3, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.3.1 Link to comment Share on other sites More sharing options...
Lisbon Posted October 30, 2021 Share Posted October 30, 2021 4 hours ago, Ruymura said: Thank you, it worked! Your welcome @Ruymura Quote Link to comment Share on other sites More sharing options...
NotMyFault Posted October 30, 2021 Share Posted October 30, 2021 On 10/27/2021 at 11:34 PM, Ruymura said: Hello! I'm processing TIFF files generated by VueScan in RAW mode. These TIFFs are negatives with gamma set to 1. After opening, I invert them with "Invert" command, but I cannot set their gamma to 2.2 as the max value in "Levels" dialog is 2. How do I set gamma to 2.2? Setting up OCIO and adding and OCIO adjustments may be another option for this kind of adjustment. Quote Mac mini M1 A2348 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
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