Computational PhotographyCS 498

Ben Bower

• What is computational photography?

• What is it used for?

• Computational imaging techniques

– High Dynamic Range Imaging

– Light fields• Light Field Rendering

• Synthetic Aperture Photography

– Relighting Through Computation

High Dynamic Range (HDR) Imaging

• Increasing the color contrast and range

• HDR imaging for

– static scenes

– non-static scenes

Light Fields

• A function of the amount of light traveling in every direction through every point in space.

• Light Field Rendering

• Synthetic Aperture Photography

Light Fields

• Light Field Rendering

Light Fields

• Synthetic Aperture Photography

• First observed by Leonardo da Vinci

• This idea can be used in photography with an array of cameras

Relighting Through Computation

• Changing the lighting of an image

– Intensity

– Color

– Origin of light

Relighting Through Computation

• Light is additive

– This concept is used to change the intensity and origin of the light

• Color

– Scaling the color channels of an image

Light Stage

Summing it up...

• Computational photography is still new

• It has many applications and will continue to grow as technology increases

• questions?