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GeneralRe: How NASA makes the images they share (for APOD fans) Pin
Dan Neely29-Sep-15 7:14
Dan Neely29-Sep-15 7:14 
GeneralRe: How NASA makes the images they share (for APOD fans) Pin
Amarnath S29-Sep-15 16:52
professionalAmarnath S29-Sep-15 16:52 
GeneralRe: How NASA makes the images they share (for APOD fans) Pin
Dan Neely30-Sep-15 2:45
Dan Neely30-Sep-15 2:45 
GeneralRe: How NASA makes the images they share (for APOD fans) Pin
Amarnath S30-Sep-15 4:29
professionalAmarnath S30-Sep-15 4:29 
GeneralRe: How NASA makes the images they share (for APOD fans) Pin
mark.gross@deq.idaho.gov30-Sep-15 4:46
mark.gross@deq.idaho.gov30-Sep-15 4:46 
GeneralRe: How NASA makes the images they share (for APOD fans) Pin
Amarnath S1-Oct-15 19:19
professionalAmarnath S1-Oct-15 19:19 
GeneralRe: How NASA makes the images they share (for APOD fans) Pin
mark.gross@deq.idaho.gov2-Oct-15 4:05
mark.gross@deq.idaho.gov2-Oct-15 4:05 
GeneralRe: How NASA makes the images they share (for APOD fans) Pin
Bob Fera30-Sep-15 6:44
Bob Fera30-Sep-15 6:44 
As someone whose hobby is astrophotography (and, to toot my own horn a bit, has 4 APODs to his credit), I thought I'd chime in here. Smile | :)

For a bit of background, like the folks at NASA and other professional observatories, I use a monochrome astronomical CCD camera with color filters to take my images. I use a few different software packages for image processing, including Photoshop and others that are specifically designed for astronomical images.

The objects we shoot are extraordinarily faint. Even after hours and hours of exposure time, if you opened a typical image in Photoshop it would appear essentially black. It takes a lot of stretching and massaging to just make the objects visible. As one of my friends put it, we're trying to take a scene shot at night and make it look like it was taken in daylight. All that said, I think it's very safe to say that our goals as astrophotograpers are, at least for RGB/true color shots, to make the images look as real as we can while also displaying as much of the data as possible. This by nature requires a bunch of "selective adjustments" to keep from blowing out highlights when trying to bring out extremely faint stuff -- the dynamic range is huge. We also go through all sorts of steps to balance the color so that it's as accurate as possible. Sure there's artistic license taken -- this is about as much of a blur between art and science as you can get -- but it's definitely not "fake" or a "lie".

Just my 2 cents... Smile | :)
GeneralFSOW WSO Pin
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