In the tutorial Creating An RGB Image Using SAOImage DS9 I showed you how to create an RGB image from three input files (one for each color). The problem is that many observations include...
Category: Image Processing
Creating An RGB Image Using SAOImage DS9
SAOImage DS9 is a FITS file viewing and manipulation application from the Chandra X-ray Science Center (CXC) and the High Energy Astrophysics Science Archive Center (HEASARC). SAOImage DS9 is used for various analysis of...
Selecting Stars In Your Image And Editing Them
A common problem in astronomical image processing is dealing with stars. Sometimes you need to adjust the stars in your image separately from your image’s subject and it would be useful to select only...
Protected: Differences between processing approaches
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Remove A Soft Color Gradient From Your Images
In another article, called Removing the Color Gradient From Your Images, I showed you how to remove the color gradient from your images. Sometimes the effect produced by that process is too strong –...
Removing Color Gradient From Your Images
A color gradient is an effect that covers your whole image and can ruin an otherwise good image. Gradients can come from various sources but the most common is light pollution caused by external...
Using FITS Liberator To Create An RGB Image
I have been showing you how to process images completely online using tools like JS9-4L by the MicroObservatory, JS9 by the Smithsonian and available at Slooh.com for its members, and Photopea – the free...
Using Slooh.com’s JS9 FITS Editor To Create RGB Images
A recent update at Slooh.com included a new FITS viewer that’s built right into Slooh.com, the editor is called JS9. Update: JS9 is available outside of Slooh.com as a stand-alone application. While this article...
How Do You Know You Have A Good Image – Interpreting The Histogram
Among the great things about using a remote telescope is that you get access to great equipment at a great location, dark skies, lots of observing nights, and automation so that you don’t have...
Investigating Your Images Using The Aladin Sky Atlas
Aladin is a free, interactive sky atlas that draws data from a broad range of sources, giving you access to a very detailed all-sky view that’s comparable to the most advanced planetarium software. Aladin...
