Each reference view is stored as a zip file with either 8 or 9 images in either jpg or png format labeled %d.jpg or undist%d.png respectively.
For every image, there is also a file named %d.IM_PARAMS.txt, in the format:
radial_distortion=%f %f focal_length=%f x_angle=%f
Radial Distortion Parameters and Focal Length: The radial distortion parameters and focal length were estimated using Jean-Yves Bouguet's Camera Calibration Toolbox for Matlab.
X Angle:To give us an idea of the relative directions of the images, each viewpoint was processed by Microsoft Research Image Composite Editor (ICE) into a panorama. The x_angle value is the angle of the image in the panorama, canonicalized to [0,360), with image 0 not necessarily at angle 0. In one case (viewpoint 9 image 4), ICE failed, and this data is missing.