stitch Posted October 12, 2018 Posted October 12, 2018 Hi everybody, has anyone a recommendation on how to create an harris shutter effect in Affinity Photo? In Adobe Photoshop is was pretty easy: Layer Style -> Advances Blending -> exclude different RGB channels. If you exclued a channel in Affinity Photo it has not the same effect. Thanks for your tips. Quote
Dan C Posted October 12, 2018 Posted October 12, 2018 Hi stitch, Welcome to the forums You can use a Channel Mixer Adjustment under Layer>New Adjustment Layer. For each layer you can set one colour to 100% (default) and set the other 2 channels to 0%. Quick example of this: Channel Mixer.mp4 Quote
R C-R Posted October 12, 2018 Posted October 12, 2018 6 hours ago, Dan C said: Quick example of this: I haven't tried it, but that looks like something a set of 3 macros might simplify. Anybody want to give that a go? Quote All 3 1.10.8, & all 3 V2.5.7 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7 All 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7
stitch Posted October 15, 2018 Author Posted October 15, 2018 Hi Dan C, many thanks for your quick answer. It's not quite what I was looking for. I wanted to create something like that: https://www.youtube.com/watch?v=oT8ZHizaaNM An further suggestions? Quote
firstdefence Posted October 15, 2018 Posted October 15, 2018 The problem in Affinity is it doesn't retain the shading while having the cyan, magenta and yellow channels, the shading is inverted to show highlight. I think the subject has to be right as well, I don't think dark images would work the same as a blonde, fair skinned girl on a white or transparent background. Quote iMac 27" 2019 Sequoia 15.0 (24A335), iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9 (Please refrain from licking the screen while using this forum) Affinity Help - Affinity Desktop Tutorials - Feedback - FAQ - most asked questions
firstdefence Posted October 15, 2018 Posted October 15, 2018 I think I've got the effect, well how to get the channels to show as Photoshop does. Quote iMac 27" 2019 Sequoia 15.0 (24A335), iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9 (Please refrain from licking the screen while using this forum) Affinity Help - Affinity Desktop Tutorials - Feedback - FAQ - most asked questions
firstdefence Posted October 15, 2018 Posted October 15, 2018 To get the image as above... go to the Channels Panel. right-click Background Green and select Clear right-click Background Blue and select Clear right-click Background Red and select Invert Now go to Layer > Invert You should end up with the image colouring above. Below is a very quick tutorial to show the method I worked out. Dan C 1 Quote iMac 27" 2019 Sequoia 15.0 (24A335), iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9 (Please refrain from licking the screen while using this forum) Affinity Help - Affinity Desktop Tutorials - Feedback - FAQ - most asked questions
stitch Posted October 15, 2018 Author Posted October 15, 2018 Hi firstdefence, you are great! Yeah, thanks! Your explanation helped a lot! It's what I was looking for If you then use a filter to erase white paper and reduce the opacity it's perfect! Many thanks! :-) firstdefence 1 Quote
amunaptra2001 Posted July 23, 2020 Posted July 23, 2020 This is just what I was looking for except one step short. Once you have the 3 images seperated and the colours masked, is there a way to merge them so that everythin that's in the same position reverts to it's original colours and anything that has changed blends into a kind of rainbow effect. For example, smoke, 3 successive images of a fire or something like that? Quote
kirkt Posted July 23, 2020 Posted July 23, 2020 @stitch - To create the Harris Shutter effect, you need to take three images and put the red channel from the first, the green channel from the second, and the blue channel from the third into a single document. Objects in all of the images that are stationary with respect to the frame will appear as normal, full color; objects that move relative to the frame will create a rainbow-like offset effect. To do this, you can import the three images onto three layers in your working document. Then you can select the red channel from the first layer, the green channel from the second layer and the blue channel from the third layer, for example, and place them into their respective channels on a new pixel layer. This is done easily using spare channels. Create a spare channel from the RED of the first image and rename it "RED." Create a spare channel from the GREEN of the second image layer and rename it "GREEN" and create a spare channel from the BLUE channel of the third image layer and rename it "BLUE." Then, make a new pixel layer and make it the active layer in the stack - let's call this layer "Harris." Right-click on the RED spare channel and select "Load to Harris Red" - repeat for the GREEN and BLUE spare channels, selecting "Load to Harris (GREEN or BLUE). In the attached example, I took the red channel from the first image, the green channel from the second image and the blue channel from the third image and combined them as outlined above to produce the Harris Shutter result. Kirk sfriedberg and amunaptra2001 1 1 Quote
kirkt Posted July 23, 2020 Posted July 23, 2020 You can also do this with fewer steps using the Apply Image command and Equations. For this example, assume that you have a new document open, with the three source images layered in it. The first layer will be the image that will give us the RED channel for the Harris composite - call this layer RED. Same for the other two layers, call them GREEN (second layer) and BLUE (third layer). On the top of the layer stack, create a new pixel layer called HARRIS - make sure you fill the Alpha channel (select the HARRIS layer, then in the Channels palette, right-click on HARRIS Alpha and select "Fill" to make the Alpha channel filled with white). Now the fun begins. 1) If it is not the active layer, select the HARRIS Layer to make it active - this is going to be the layer upon which the Apply Image filter operates, so it needs to be the active layer before invoking the Apply Image command. 2) Select Filters > Apply Image... 3a) For this step, we are going to place the red channel from the RED image layer into the red channel of the HARRIS layer. To do this, drag the RED layer from the Layers palette onto the upper area in the Apply Image dialog to make the RED layer the source for the Apply Image operation. 3b) Next, check the "Equations" box and make sure the Equation Color Space is set to RGB. In the equations boxes below, you are going to specify the channels for the HARRIS layer (the "Destination" layer) based on the channels in the RED layer (the "Source" layer). In this step, we want to place the red channel from RED into the red channel of HARRIS, and leave the green and blue channels of HARRIS alone. To do this, we enter the following equations: DR = SR DG = DG DB = DB That is, the Destination Red (DR) channel (the red channel of HARRIS) equals the Source Red (SR) channel (the red channel of RED). Note that the DG = DG and DB = DB equations basically mean that the Destination Green (and Blue) equals whatever it already is (in this case, nothing). 3c) Repeat 3b for the GREEN and BLUE layers as sources for their respective channels in the HARRIS layer. So, for the green channel of the HARRIS layer, make sure HARRIS is the active layer, select Filter > Apply Image..., drag the GREEN layer onto the Apply Image dialog, check the Equations box and enter: DR = DR (leave red alone) DG = SG (place the green from the Source [GREEN] into the Destination [HARRIS]) DB = DB (leave blue alone). For the blue channel in HARRIS, drag the BLUE layer onto the Apply Image dialog - the equations will be: DR = DR DG = DG DB = SB Taa daaah! This is a more elegant method, but if you do not understand how to use Apply Image, it can be very confusing. Kirk amunaptra2001 and sfriedberg 1 1 Quote
David in Яuislip Posted July 23, 2020 Posted July 23, 2020 kirkt beat me to it Here's a quick macro that does just that It needs three images which must be rasterised Pixel layers. It copies the Red channel from the lowest layer, the Green from the middle, the Blue from the top. Then it creates a new Pixel layer called Final, pastes the channels into that then deletes the spare channels You'll get different effects by reordering the layers before running the macro Hours of fun! dcHarrisShutter.afmacro amunaptra2001, kirkt and sfriedberg 2 1 Quote Microsoft Windows 11 Home, Intel i7-1360P 2.20 GHz, 32 GB RAM, 1TB SSD, Intel Iris Xe Affinity Photo - 24/05/20, Affinity Publisher - 06/12/20, KTM Superduke - 27/09/10
amunaptra2001 Posted July 24, 2020 Posted July 24, 2020 you guys are awesome, thank you, I will try this later Quote
amunaptra2001 Posted August 10, 2020 Posted August 10, 2020 So here's the results I found I had to load the source pictures from file. but everything else was the same Quote
thomaso Posted August 11, 2020 Posted August 11, 2020 On 10/12/2018 at 12:46 PM, stitch said: has anyone a recommendation on how to create an harris shutter effect in Affinity Photo? In Adobe Photoshop is was pretty easy: Layer Style -> Advances Blending -> exclude different RGB channels. If you exclued a channel in Affinity Photo it has not the same effect. Wasn't Harris initially photographing with 3 color filters? In APhoto 3 fill layers might achieve the result quickly. If the single images are properly isolated – as in your youtube sample – you don't need these masking (Rectangle) layers: Affinity Publisher maybe easier, you just assign fill colors to RGB images and set them to blend mode Multiply: Quote macOS 10.14.6 | MacBookPro Retina 15" | Eizo 27" | Affinity V1
walt.farrell Posted August 11, 2020 Posted August 11, 2020 9 hours ago, thomaso said: Affinity Publisher maybe easier, you just assign fill colors to RGB images and set them to blend mode Multiply: That shouldn't require Publisher; Photo and Designer provide the same capability. In all 3, an (Image) layer can be assigned a Fill color, and a blend mode. Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. Laptop 2: Windows 11 Pro 24H2, 16GB memory, Snapdragon(R) X Elite - X1E80100 - Qualcomm(R) Oryon(TM) 12 Core CPU 4.01 GHz, Qualcomm(R) Adreno(TM) X1-85 GPU iPad: iPad Pro M1, 12.9": iPadOS 18.3, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sequoia 15.0.1
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