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Input Data
Unstructured set of photos (with calibration information and camera positions)
Proxy Geometry

Requirements
Render interpolated views of the scene

• in real time
• with no pre-processing or re-sampling of the input images
• with smooth interpolation as the camera moves through the scene
• consistent (reproduce source image if desired viewpoint matches)

Rendering
For each pixel of the output image, compute a blending of the input images. First, compute view ray by intersecting with proxy geometry, then find k-best input images.

For each input image , compute the angle difference at the intersection point.
We denote by the angle difference of the k-best camera. Now, we can compute the color contribution of each image as

and normalizing


To improve consistency, we can emphasize weights where the angle is very small, e.g.:


Hardware Implementation
Tessellate screen with a triangle grid. Insert into this grid:

• Edges of the proxy geometry (here are discontinuities)
• Epipolar points of the cameras (we want the image to be consistent there)

Compute blending weights for triangle vertices. Render each triangle several times (at least , at most times) with the appropriate textures and additive blending.