s i h bbl ’ u iseeing hubble’s universehubblesource.stsci.edu/services/events/telecons/... · s...

S i H bbl ’ U iS i H bbl ’ U iSeeing Hubble’s UniverseSeeing Hubble’s UniverseMaking Pictures from DataMaking Pictures from Data

Zolt LevayZolt LevayySpace Telescope Science Institute Office of Public

ySpace Telescope Science Institute Office of Public

OutreachOutreach

From This…From This…

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…To This…To This

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Pictures from DataPictures from Data

Byproduct of science dataByproduct of science data.Combine exposures, scale data.Reconstruct color.Photography techniques make features in thePhotography techniques make features in the data visible.

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Opportunities | ChallengesOpportunities | Challenges

Available dataAvailable dataBrightness rangeSpatial coverageSpectral coverageSpectral coverageCosmetics

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Cosmic RaysCosmic Rays

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Cosmic RaysCosmic Rays

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Cosmic Rays RemovedCosmic Rays Removed

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Enhance Brightness & ContrastEnhance Brightness & Contrast

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Enhance Brightness & ContrastEnhance Brightness & Contrast

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Enhance Brightness & ContrastEnhance Brightness & Contrast

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Enhance Brightness & ContrastEnhance Brightness & Contrast

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Spatial DimensionSpatial Dimension

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ExposuresExposures

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MosaicMosaic

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Luminosity DimensionLuminosity Dimension

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Color DimensionColor Dimension

I V B

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“Natural” Color Composite“Natural” Color Composite

Red Green Blue

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“Natural” Color Composite“Natural” Color Composite

Red Green Blue

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Alternate Color AssignmentAlternate Color Assignment[N II] H⟨ [O III]

Red Red Cyan

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Alternate Color AssignmentAlternate Color Assignment[N II] H⟨ [O III]

Red Red Cyan

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Alternate Color AssignmentAlternate Color Assignment[N II] H⟨ [O III]

Red Red Cyan

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Alternate Color AssignmentAlternate Color Assignment[N II] H⟨ [O III]

Red Green Blue

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Alternate Color AssignmentAlternate Color Assignment[N II] H⟨ [O III]

Red Green Blue

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Cosmetic RetouchingCosmetic Retouching

Instrument artifactsInstrument artifactsUneven backgroundNoiseSharpeningSharpening

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Instrument ArtifactsInstrument Artifacts

CCD charge bleedCCD charge bleed

Clone stamp, healing brushp, g

Copy and rotate

Mask

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Instrument ArtifactsInstrument Artifacts

CCD charge bleedCCD charge bleed

Clone stamp, healing brushp, g

Copy and rotate

Mask

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Instrument ArtifactsInstrument Artifacts

CCD charge bleedCCD charge bleed

Clone stamp, healing brushp, g

Copy and rotate

Mask

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Instrument ArtifactsInstrument Artifacts

CCD charge bleedCCD charge bleed

Clone stamp, healing brushp, g

Copy and rotate

Mask

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Uneven BackgroundUneven Background

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Uneven BackgroundUneven Background

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Uneven BackgroundUneven Background

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Useful Art/Photography Principles Useful Art/Photography Principles

Color form textureColor, form, texture.Composition, perspective.Lighting, tonality.

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CompositionComposition

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CCrop area

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C dCropped

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Pictures from DataPictures from Data

Byproduct of science dataByproduct of science data.Photography techniques make features in the d t i ibldata visible.Subjective choices informed by art principles make science images visually more appealing.Nature photographyNature photography.

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