What you'll want to do is move the black point slider slightly to the right to either meet, or just pass, the start of the peak and then move the mid-point slider to the right until the background is dark but the object remains bright.
If you have hours worth of exposures on bright galaxies, you may only need to do this step once but often you'll need to repeat this step.
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There are a few more advanced techniques you could employ that would enhance your images further, but getting used to the basics and learning how to personalise your curves will pay dividends later.It also tells you on how to process your images in reverse image search ipad app programs like RegiStax and AutoStakkert!, with step-by-step directions that will produce beautiful results.Before, after, first, open your image and, if it is not already a 16-bit image, make it so by clicking on the Image Mode menu option.Finally we increased the color saturation of the image.Depending on the image you are working on, it may be helpful to make a number of iterations of this process: isolate the core, use Curves, deselect, use Curves.In fact, if you could record the sky background color with perfect accuracy, you would see it has a faint color component due to the natural airglow (green or red depending on the color of the airglow at the particular time your image as taken.Rather than changing the shape of the Curves line, we will keep it linear but change its slope.Don't waste your long and hard efforts at astrophotography - find out how thousands of others just like you have gotten excellent results by using these books.Then we adjusted the brightness and contrast with levels adjustments.These, in turn, have objects plotted on them that link to object pages.Before making any additional adjustments, it is a good idea to mask the core of the galaxy so it does not get burned out in the process.Step 1- The Raw Image: All of my Canon 10D work involves acquiring and processing Raw Format files.Subjectively, most people would say it should black.It is for beginning astrophotographers and explains in step-by-step detail how to stack your images in DeepSkyStacker and then process them in Photoshop.Click your mouse cursor in the image to see a comparison between the image before and after basic image correction in Photoshop.You can do it too!Again, if you think you've over-cooked it, you can always hit ctrlaltz to go back a step or two.Begin with simple adjustments in the Curves.Usually the color of the sky background ends up being red or brown in our original digital images and this is, in fact, accurate.
Using Color Balance easily remedied this problem as can be seen in the histogram below.
But this is not really true.