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Showing results for tags 'astro photography'.
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Greetings to All, Here is a picture of the moon to be included in my montage of moon phase images in colour. This image is short listed to be included in my montage of moon phase images in colour. All image processing was done in Affinity Photo (excellent program!) For those who are interested: The colour saturation was obtained in a 5 stage process (5 adjustment layers) of gradually increasing levels of colour saturation. This colour saturation process will amplify colour noise so one must start with a "low noise image. The low noise image was obtained by stacking 15 images (noise averaging - Greek letter Mu) to give about 4x improvement. For crescent images we might try stacking 25 images for an improvement of x5. I am trying to find a logical explanation for the green light over the craters. Regards, Jeremy.
I am working with astro photos, converting the raw image to 16 bit TIFF images and stacking them. I have a few suggestions for you that would make my work smoother. I would be very grateful if you would implemented them. Suggestion 1: Would it be possible to change the default stack operator, like in the settings? I commonly use mean value rather than median value, and always have to correct it. Suggestion 2: Using Levels Adjustment, I have noticed that it is indeed possible to use decimal values for Black Levels, for instance 1.5 %, although this is not documented. This is very useful when working with 16 bit images. However, the value shown will always be the rounded integer value, in this case 2, even when the decimal value is used. Would it be possible to show a decimal digit, at least for levels below 10% ? Like, it would show 1.5% as the decimal value 1.5% instead of the integer value 2%. Suggestion 3: When working with astro photos it is very common to first subtract the dark current image, and then divide with a flatfield image. Subtraction is easy to do using the Subtract mode, but how to perform division is not so easy to find. By googling I have found that division is indeed possible to do by adding the flatfield image layer, adding an Invert Adjustment layer to it, and then changing to Colour Dodge mode. Since this is a "hidden" feature, would it be possible for you to simply combine these two steps into one, and name it Divide mode? A good reason for this: Any serious astro photographer who fails to find this hidden feature when searching the current documentation, and mistakenly rejects the usefulness of Affinity Photo because of this, would be pleasantly surprised to find that the feature does exist. P.S. I am currently using Affinity Photo 1.8.2 on a Mac.
Hi Affinity-Team, I have just downloaded the affinity photo demo (for Windows), watched some tutorials and tried a little bit for myself and have some questions. I like to take photos of starry landscapes like the ones I attached to this post. Now to reduce noise I'd like to stack them for which I am currently using a combination of Hugin for alignment and Image Magick to stack them. I let these tools create two stacked images one of the static foreground and one of the aligned background, after that I currently use Gimp to load both images and take only the sky portion of the aligned and stacked image for the final images sky and the stacked image without aligning for the foreground. I tried to convert this complete workflow to affinity photo using the "New stack" function. Unfortunately the program always aligns the images (I use a stack of 32x20 second exposures) using the trees in the foreground which leads to a blurry sky without any stars visible. Is there a way of alternating this behavior? I thought about (and tried) loading the images as stack, ungroup them, applying a layer mask which leaves only the stars visible and then regroup them using 'Arrange > Live Stack Group', however this doesn't (re-)align my images and the result is the same as when loading the images as stack. Is there any possibility for me to support my workflow in affinity photo, or is anything planned for future releases? Greetings and thanks in advance.