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Published byJamal Baxter Modified over 10 years ago
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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
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2 From This…
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3 …To This
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Pictures from Data ✦ Byproduct of science data. ✦ Combine exposures, scale data. ✦ Reconstruct color. ✦ Photography techniques make features in the data visible. 4
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Opportunities | Challenges ✦ Available data ✦ Brightness range ✦ Spatial coverage ✦ Spectral coverage ✦ Cosmetics 5
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6 Cosmic Rays
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8 Cosmic Rays Removed
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Enhance Brightness & Contrast 9
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Enhance Brightness & Contrast 11
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Enhance Brightness & Contrast 12
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Spatial Dimension 13
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Exposures 14
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Mosaic 15
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Luminosity Dimension 16
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Color Dimension IVB 17
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RedGreenBlue “Natural” Color Composite 18
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RedGreenBlue “Natural” Color Composite 19
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[N II] Red HH [O III] Cyan Alternate Color Assignment 20
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[N II] Red HH [O III] Cyan Alternate Color Assignment 21
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[N II] Red HH [O III] Cyan Alternate Color Assignment 22
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Alternate Color Assignment [N II] Red HH Green [O III] Blue 23
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Alternate Color Assignment [N II] Red HH Green [O III] Blue 24
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✦ Instrument artifacts ✦ Uneven background ✦ Noise ✦ Sharpening Cosmetic Retouching 25
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✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 26
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✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 27
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✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 28
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✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 29
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Uneven Background 30
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Uneven Background 31
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Uneven Background 32
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Useful Art/Photography Principles ✦ Color, form, texture. ✦ Composition, perspective. ✦ Lighting, tonality. 33
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Composition 34
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35 Crop area
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36 Cropped
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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
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