Most image rendering methods try to mimic real cameras by generating images having the perspective projection. In contrast, a unique power of image mosaicing is the ability to generate new views with "impossible" projections which are not perspective. This can be done with mosaicing methods that construct a panoramic mosaic image by stitching together narrow strips, each strip taken from a different source image. A different selection of strips gives a different mosaicing effect using the same set of source images, including the generation of stereo images. For example, given a sequence of source images from a camera moving sideways, a set of panoramic stereo views can be generated, even though perspective cameras allow only a very narrow view for stereo images. And even though the original (single) camera moved sideways, a sequence of forward moving stereo images can be generated. As each of the stereo views is generated synthetically from the original images, stereo effects can be adjusted in the post production stage. Such effects include changing the stereo baseline and the vergence. Post production enables the same set of original images to be used for generating stereo images for various displays and viewing conditions.
Panoramic stereo pictures are created by stitching together frames taken from a single moving video camera. Stereo panoramas can be created up to a full 360 degrees. The mosaicing process is robust and fast, and can be performed in real time. Mosaicing starts by computing the motion between the video frames. The video frames, together with the motion between frames computed in the previous step, are used to generate two panoramic pictures: One picture for the left eye and one picture for the right eye. Since the camera is moving, each object is viewed from different directions in different frames. Stitching together strips from the different video frames, selected to have the correct viewing directions for stereo perception, generates the panoramic stereo pictures. The stereo mosaicing process allows several features that were not available before: (1) The creation of stereo panoramic images in 360 degrees. (2) Automatic disparity control: increasing stereo disparity for far away objects, and reducing stereo disparity for close object, to give optimal stereo viewing in all directions and for all distances. (3) The creation of multiple pictures from multiple views, not limited to two views. This enables viewing the panoramic stereo pictures using lenticular technology.
Conference Committee Involvement (2)
Digital Photography X
3 February 2014 | San Francisco, California, United States
Mobile Computational Photography
4 February 2013 | Burlingame, California, United States
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