Interactive Digital Photomontagemisha/Fall07/Notes/Agarwala04.pdf · Interactive Digital...

Interactive Digital Photomontage

Aseem Agarwala1 Mira Dontcheva1 Maneesh Agrawala2 Steven Drucker2 Alex Colburn2 Brian Curless1 David Salesin1,2 Michael Cohen2

1University of Washington 2Microsoft Research

Presented by: Gagan Bansal1

Photomontage : What does it mean

Combining parts of a set of photographs into a single composite picture ---(of course with minimum visible artifacts !!!!)

2Interactive Digital Photomontage

Presented by : Gagan Bansal

Interactive Digital Photomontage Presented by : Gagan Bansal

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Issues Involved

• How to select the seams where to cut the images so that they merge as seamlessly as possible in the composite image ?

• How to minimize the remaining artifacts in the composite image?


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Overview of the Approach

• Choosing seams– Use Graph Cut

• Minimizing the remaining artifacts– Gradient domain fusion based on Poisson equation


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Image Objectives

• Designated Color• Minimum or maximum luminance• Minimum or maximum Contrast• Minimum or maximum likelihood• Eraser• Minimum or maximum difference• Designated Image


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Seam Objectives

• Colors – match colors• Colors and gradients• Colors and edges – prefer seams that lie

along edges

Seam objectives are global


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Graph Cut


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Graph Cut

• Data Penalty– Designated Color – Euclidean distance of color to

be assigned from color in source image– Designated Image - 0 if same label– Eraser – Euclidean distance of source from current

composite ( ? )


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Graph Cut


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Gradient Domain Fusion

• Use labels on composite to determine the source gradient field.

• Same as in Perez et al.• Add a constraint – user chooses a pixel whose

color constrained to color in source image


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Applications

• Selective Composites


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Applications

• Selective Composites• Extended depth of field


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Result – used maximum local contrast


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Applications

• Selective Composites• Extended depth of field• Relighting


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Result – using max or min luminance


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Applications

• Selective Composites• Extended depth of field• Relighting• Stroboscopic visualization of movement


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Applications

• Selective Composites• Extended depth of field• Relighting• Stroboscopic visualization of movement• Time lapse mosaics


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Applications

• Selective Composites• Extended depth of field• Relighting• Stroboscopic visualization of movement• Time lapse mosaics• Panoramic stitching


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Result


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Applications

• Selective Composites• Extended depth of field• Relighting• Stroboscopic visualization of movement• Time lapse mosaics• Panoramic stitching• Clean plate production


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Result – using max or min likelihood


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Interactive Digital Photomontagemisha/Fall07/Notes/Agarwala04.pdf · Interactive Digital...

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