You can now delete the window that you copied this file from by clicking the X symbol in the corner of the tab and proceed onto the next image file. This will place your first layer on top of your base image as ‘Layer 1’. Next, click back on the base image window, and press Ctrl and V. To combine these files into a single image ready for stacking, first start with the file window to the right of the base image – this will become Layer 1.Ĭlick on the tab for this image and then press the Ctrl and A keys at the same time.You will now see the image highlighted with dashed lines.Īlternatively, you can click Select > All in the image window.By pressing Ctrl and C, this image is copied (or click Edit > Copy). In Adobe Photoshop we can load our image files in separate windows, ready to become stacked layers. We will copy and paste all the other image files onto this one. The file on the far left of Screenshot 1 – labelled Start image in our example – will form our base image. Photoshop then uploads each of the selected files in separate windows.Įach of these files will be used to form layers within our stacked image. To open multiple image files in Photoshop, we hold the Ctrl key and select all the required files from the file location, before clicking Open. We start by opening the image files that we want to stack in Photoshop.Ĭlick File > Open and navigate to the image file location. Credit: Charlotte Daniels Open your image files Our initial image of the Milky Way is full of unwanted detail, which we will remove in ‘Layers’. Here we'll show you how to use Layers in Photoshop to stack and process an image of the Milky Way to bring out its wonderful, starry detail.įor more advice, read our guide to astrophotography and our tutorial on astrophotography image processing. You can find out more about this process in our guide to astrophotography stacking.Īs the Layers function provides the ability to delete small processing errors at any stage of our edit, it means we don’t have to start again if we make a mistake. It also allows us to make gradual enhancements to our image files along the way. Layers can be used to stack multiple image files, a technique that reduces noise (unwanted artefacts) in the final image. How to stack layers of images of the Milky WayĪn essential part of an astrophotographer’s processing toolbox, the Layersfunction exists in most processing software, including Adobe Photoshop and GIMP.
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