Colorize an image1/30/2024 You now have one image that combines the red, green(visual) and blue images. Then go back to the red image (with the visual(green) image copied on top of it) and select Edit > Paste. Now, follow the same process with your blue image.Change the layer name to "Red" if you wish. This window shows that a new layer has been added to the red image, it will be called Layer 1. You should see a Layers window to the right of your screen, if you do not, go to Window > Layers.Select your red image, and select Edit > Paste.You can also create a duplicate the layer by right clicking on the layer then clicking duplicate then drag and drop the layer onto the red image, or layer from background by right clicking then clicking layer from background then drag and drop. Select your Visual (green) image, and go to Select > All then Edit > Copy.To do this, you copy and paste the Visual (green) and blue images on top of the red image.Now that the images are colored, they need to be combined into a single image. You should now have three coloured images. Go to Image > Adjustments > Hue/Saturation, and enter Hue: 120 Saturation: 100 Lightness: -50 and adjust as necessary.įinally, select your blue image, Image > Adjustments > Hue/Saturation and enter Hue: 240 Saturation: 100 Lightness-50 and adjust as necessary. Leaving Hue alone, adjust Saturation and Lightness until you have a high contrast, crisp image. ![]() For the red filter image enter Hue: 0 Saturation: 100 Lightness: -50. First, tick the Colorize button in the lower-right corner. This will open a window with three sections. When all three images are open, select the red image. Then go to Image > Adjustments > Hue/Saturation. To do this launch Photoshop, open one of the color images and go to: Image>Mode>RGB Color. The next stage is to begin to add some color information into these images. Import the three Images into Photoshop by opening photoshop and clicking import or by dragging and dropping the three images onto the photoshop icon. Open the next image into FITS Liberator and repeat until all three images are edited. When you are happy with the way the image looks, tick the 8-bit button which is below the Autoscale button (If you forget you can always change it later in Photoshop by clicking Mode then pressing 8-bit).Ĭlick Save As and then name your file and save it to somewhere you will remember. (In general, x 1.5, x 2, x 3, x 4, x 5, and exp(x) don’t do anything.) Different stretch functions produce different results with each image so see what works. Set the white and black level sliders in the histogram graph to give a good amount of contrast without too much black or too much saturation.Įxperiment with the different Stretch functions to enhance fainter parts of the image. fits to be able to open them in FITS Liberator.) fits.fz then you will need to rename them to just. (Note: If your downloaded files appear as. To open more than one at a time press Shift while you select the files. Launch FITS Liberator, and open your three FITS files by going to File > Open. Download and installation instructions can be found on the NOIRLab FITS Liberator site. You will also need FITS Liberator which changes the file into something Photoshop can read. Name them by their filter color (this will becomes helpful later on). A selection of objects can be found in the table below, simply click on the object name to access the observations and download the three FITS files. You can use observations from the LCO data archive. You will need separate red, green(visual) and blue filter observations to follow this article. If you are making observations the green file will be called Visual and when selecting a filter it will be v. When downloading pictures from the LCO website the green file will be called Green FITS. With Photoshop you can add the colors back and combine it with the images from other filters to produce a full color image. Color images are a composite of observations taken with a red, a green(visual), and a blue filter. A grey scale FITS files is produced for each filter used in your observation. When you make astronomical observations you end up with FITS files.
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