Seeing Hubble’s Universe Making Pictures from Data Zolt Levay Space Telescope Science Institute Office of Public Outreach Zolt Levay Space Telescope Science.

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Presentation transcript:

Seeing Hubble’s Universe Making Pictures from Data Zolt Levay Space Telescope Science Institute Office of Public Outreach Zolt Levay Space Telescope Science Institute Office of Public Outreach

2 From This…

3 …To This

Pictures from Data ✦ Byproduct of science data. ✦ Combine exposures, scale data. ✦ Reconstruct color. ✦ Photography techniques make features in the data visible. 4

Opportunities | Challenges ✦ Available data ✦ Brightness range ✦ Spatial coverage ✦ Spectral coverage ✦ Cosmetics 5

6 Cosmic Rays

7

8 Cosmic Rays Removed

Enhance Brightness & Contrast 9

10

Enhance Brightness & Contrast 11

Enhance Brightness & Contrast 12

Spatial Dimension 13

Exposures 14

Mosaic 15

Luminosity Dimension 16

Color Dimension IVB 17

RedGreenBlue “Natural” Color Composite 18

RedGreenBlue “Natural” Color Composite 19

[N II] Red HH [O III] Cyan Alternate Color Assignment 20

[N II] Red HH [O III] Cyan Alternate Color Assignment 21

[N II] Red HH [O III] Cyan Alternate Color Assignment 22

Alternate Color Assignment [N II] Red HH Green [O III] Blue 23

Alternate Color Assignment [N II] Red HH Green [O III] Blue 24

✦ Instrument artifacts ✦ Uneven background ✦ Noise ✦ Sharpening Cosmetic Retouching 25

✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 26

✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 27

✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 28

✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 29

Uneven Background 30

Uneven Background 31

Uneven Background 32

Useful Art/Photography Principles ✦ Color, form, texture. ✦ Composition, perspective. ✦ Lighting, tonality. 33

Composition 34

35 Crop area

36 Cropped

Pictures from Data ✦ Byproduct of science data. ✦ Photography techniques make features in the data visible. ✦ Subjective choices informed by art principles make science images visually more appealing. ✦ Nature photography. 37