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Tadpoles in RGBHOO, Paul Macklin
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Tadpoles in RGBHOO

Revision title: RGBHOO

Tadpoles in RGBHOO, Paul Macklin
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Tadpoles in RGBHOO

Revision title: RGBHOO

Equipment

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Acquisition details

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Description

This image combines 8 hours of RGB (96 x 5 min) and 7 hours of dual narrowband (42 x 10 min), captured at f/7 on an 8" EdgeHD. I'm really pleased at how this combination of RGB and narrowband captures more contrast between the tadpoles and the surrounding ionized gas and dust, but still brings in some of those original rich RGB colors. 

Here are my processing details, using AstroPixelProcessor:
<ol>
<li>1. Process RGB alone as normal, including 75% star reduction.</li>
<li>2. Extract and stack Ha.</li>
<li>3. Extract and stack [OIII]</li>
<li>4. analyze stars and register these stacks, and save the registered frames</li>
<li>5. Load the registered frames to combine RGB with the RGBHOO formula.</li>
<li>6. Modify to be closer to the HOO2 formula:<br>
Set Ha x 1 <br>
Red: 100<br>
Green: 50<br>
Blue: 10<br>
<br>
Set [OIII] x 1.75<br>
Red: 10<br>
Green: 50<br>
Blue: 100<br>
<br>
</li>
<li>7. Use built-in star reduction to reduce size and intensity to 80%</li>
<li>8. Export 16bpp TIFF to photoshop</li>
<li>9. Auto-tone</li>
<li>10. Curve at linear-contrast<li>
<li>11. Slight increase in vibrance (15/15)</li>
<li>12. Mild cleanup in Topaz (1% denoise, 5% sharpen)</li>
<li>13. Auto-tone</li>
<li>14. Curves (linear contrast)</li>
</ol>

Comments

Revisions

  • Tadpoles in RGBHOO, Paul Macklin
    Original
  • Tadpoles in RGBHOO, Paul Macklin
    B
  • Tadpoles in RGBHOO, Paul Macklin
    C
  • Tadpoles in RGBHOO, Paul Macklin
    D
  • Tadpoles in RGBHOO, Paul Macklin
    E
  • Tadpoles in RGBHOO, Paul Macklin
    F
  • Final
    Tadpoles in RGBHOO, Paul Macklin
    G

B

Title: Ha from 42 x 10 min of dual narrowband (L-extreme)

Uploaded: ...

C

Title: [OIII] from 42 x 10 min of dual narrowband (L-extreme)

Uploaded: ...

D

Title: Processed bi-color from 42 x 10 min of dual narrowband (L-extreme)

Uploaded: ...

E

Title: HOO2 stack of extracted Ha and [OIII] (from 42 x 600 sec dual narrowband)

Uploaded: ...

F

Title: Improved HOO2 (recombined from 42 x 600s dual narrowband)

Description: Here, I tweaked AstroPixelProcessor's HOO2 formula:
Ha x1
Red : 100
Green: 50
Blue: 10
[OIII] x 1.5
Red: 10
Green: 50
Blue: 100

Uploaded: ...

G

Title: RGBHOO

Description: Finally, I put it all together in a modified RGB + HOO2. More details in the main description.

Uploaded: ...

Sky plot

Sky plot

Histogram

Tadpoles in RGBHOO, Paul Macklin

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