Ik heb vanochtend de flats nog geschoten Kees, dus die moet ik vanavond maar eens loslaten op de ruwe tiff bestanden en kijken wat voor resultaat dat geeft.
Ik heb toevallig net op DpReview een uitleg gedaan over hoe ik de afbeeldingen heb bewerkt, dus even een copy-paste van deze uitleg hieronder:
First of all, I used DSS with its standard settings, so all settings were used unchanged and left to the default settings of DSS (as I don’t fully understand what the settings will do to my final image ;-))
1. Import the RAW files to DSS
2. Calculate stars so about 20-40 stars are detected.
3. Calibrate frames and stack 100% using the “normal stack mode (this will provide the starstack with a smear of the comet through the frame like in the picture below.
View: original size
4. Use the same calibrate images you used above to assign the core of the comet in the first, last and best image from the sequence. (You can toggle and sort images by time and score just by clicking in the tabs above the imported files)
5.Once you set the comets core in those frames you can stack the images, this time using the comet stack mode set to “Stack on Comet” and use 100% of the images. This will provide you with the sharp comet image.
View: original size
6. Save both comet and star stack as 32bit tif files.
7. Import into Photoshop.
8. Use “levels” to stretch both images to your liking (pull down the midtones slider underneath the peak, and pull the blackpoint just in front of the peak, aply and repeat several times so you will see the peak broadening. mine took about 4-5 iterations to get the result I wanted)
9. Next, clone out the comet in the “Starstack” using the clone-tool.
10. Open the “Comet stack” and copy the content by clicking ctrlA, CtrlC and past the copied content into the “Star-stack”. It should become vissable as a layer in your “Stars-stack”.
11. Then, blend both images together with Photoshop using layers. Set the top layer (The “Comet stack”) to an opacity of 60% so you can see where you have to put the comet and drag it in the right position.
12. Then, apply a mask to the “Comet stack” layer and just brush away what you don’t like (Black reveals, white conceals). You can apply a smoother transition by giving the mask-layer a mild gausian blur by selecting the mask and aply “Filter-blur-gausianblur” menu.
13. Once you are satisfied, you can put the “Comet stack” layer back to 100% opacity and make one layer of your composite and aply some further fine-tuning if you want.
View: original size
Hope this helped you a bit!
