Nathan Tu Posted November 16, 2017 Share Posted November 16, 2017 I have picture has different gray background, need to change it to white, picture attached. In Photoshop, I can select by color range, and then add sample, it will help me easily select all the gray color I want, then adjust it. But in AP, I can't use the same solution, except using the selection brush tool. Anyone knows a better and quicker way, cause I really don't want to select the gray area by using the selection brush tool? Quote Link to comment Share on other sites More sharing options...
v_kyr Posted November 16, 2017 Share Posted November 16, 2017 In AP there should be similar selection capabilities, like "Selection -> Mark selected color..." and then adjust the wished tolerance settings for the selection. Further there are also tonal selections like "Select lights", "Select shadows", "Select intermediate tones", which then can be enhanced and if needed inverted etc. - Just give it a try. Quote ☛ Affinity Designer 1.10.8 ◆ Affinity Photo 1.10.8 ◆ Affinity Publisher 1.10.8 ◆ OSX El Capitan ☛ Affinity V2.3 apps ◆ MacOS Sonoma 14.2 ◆ iPad OS 17.2 Link to comment Share on other sites More sharing options...
Nathan Tu Posted November 16, 2017 Author Share Posted November 16, 2017 4 hours ago, v_kyr said: In AP there should be similar selection capabilities, like "Selection -> Mark selected color..." and then adjust the wished tolerance settings for the selection. Further there are also tonal selections like "Select lights", "Select shadows", "Select intermediate tones", which then can be enhanced and if needed inverted etc. - Just give it a try. Thank you, but I think it's just not as handy as PS can do, anyway, this kinda solves the problems for now. Quote Link to comment Share on other sites More sharing options...
Alfred Posted November 16, 2017 Share Posted November 16, 2017 Select the label, invert the selection, and then use ‘Erase White Paper’ to remove the off-white background; the wires have some highlights and are cloudy at the ends, so you may need to adjust the blend ranges to restore any opacity lost by the erasure. Add a white fill layer and move it below the image. Quote Alfred Affinity Designer/Photo/Publisher 2 for Windows • Windows 10 Home/Pro Affinity Designer/Photo/Publisher 2 for iPad • iPadOS 17.4.1 (iPad 7th gen) Link to comment Share on other sites More sharing options...
HVDB Photography Posted November 16, 2017 Share Posted November 16, 2017 Selective Color Adjustment set Blues > Cyan -100% , Black -100% set Whites > Black -100% Brightness/ Contrast Adjustment set Contrast 60% SelectiveColorAdj.afphoto Nathan Tu, shizuka and R C-R 3 Quote Affinity Photo 2.3.1 Laptop MSI Prestige PS42 Windows 11 Home 23H2 (Build 22631.3007) - Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz 2.00 GHz - RAM 16,0 GB Link to comment Share on other sites More sharing options...
R C-R Posted November 16, 2017 Share Posted November 16, 2017 24 minutes ago, HVDB Fotografie said: Selective Color Adjustment set Blues > Cyan -100% , Black -100% set Whites > Black -100% How did you determine that the Blues needed a -100% Cyan adjustment? This method worked quite well on this image but I would like to know how to apply it to others that might have a different grey background. In this image, this does shift the greys of the label to white, but that is easily fixed by painting with black on the masks of the adjustment layers. Very cool technique! Quote All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7 Affinity Photo 1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7 Link to comment Share on other sites More sharing options...
HVDB Photography Posted November 16, 2017 Share Posted November 16, 2017 2 hours ago, R C-R said: How did you determine that the Blues needed a -100% Cyan adjustment? That is thanks to my trained eye for color cast detection. As an amateur photographer, I notice a slight blue color cast with this image (on my calibrated screen). One can check this by pulling the slide bar +/- 10% to the right via "White Balance Adjustment". With the "Brightness/Contrast Adjustment" on top this produces a similar result but with a slightly warmer color tint. Matter of taste of course. 2 hours ago, R C-R said: This method worked quite well on this image but I would like to know how to apply it to others that might have a different grey background. That is depending on the image itself. It's often trial and error. And it doesn't help all the time. Sometimes using the "Channel Mixer Adjustment" can also be effective because there one can choose between: Grey, RGB, CMYK and LAB colour format. I did the test for this image using cyan under CMYK. Originally cyan was standing at 100%. If you pull the slider to 0% this also produces a similar result. See the new "SelectiveColorAdj_[2].afphoto" attachment. 2 hours ago, R C-R said: In this image, this does shift the greys of the label to white, but that is easily fixed by painting with black on the masks of the adjustment layers Yes, but is slightly more labor-intensive. SelectiveColorAdj_[2].afphoto R C-R 1 Quote Affinity Photo 2.3.1 Laptop MSI Prestige PS42 Windows 11 Home 23H2 (Build 22631.3007) - Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz 2.00 GHz - RAM 16,0 GB Link to comment Share on other sites More sharing options...
Nathan Tu Posted November 17, 2017 Author Share Posted November 17, 2017 Really amazing, thanks so much, also really great for all the explanations. Quote Link to comment Share on other sites More sharing options...
toltec Posted November 17, 2017 Share Posted November 17, 2017 You could also do it with a Curves Adjustment layer. Use the picker to select the grey and drag up (or drag on the curve), that's a bit like a selective adjustment. Move the darker areas to make an S curve (as shown in cyan). After the main curve (Master), I moved the Red a little to remove the slight Cyan cast in the highlights. Nathan Tu and Alfred 2 Quote Windows PCs. Photo and Designer, latest non-beta versions. Link to comment Share on other sites More sharing options...
Nathan Tu Posted November 17, 2017 Author Share Posted November 17, 2017 1 hour ago, toltec said: You could also do it with a Curves Adjustment layer. Use the picker to select the grey and drag up (or drag on the curve), that's a bit like a selective adjustment. Move the darker areas to make an S curve (as shown in cyan). After the main curve (Master), I moved the Red a little to remove the slight Cyan cast in the highlights. this method is also great and fast. Quote Link to comment Share on other sites More sharing options...
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