Stitch Reliability Measurement for Recovering Accurate Camera Focal Length in Panoramic Mosaics
Hwa Seong Kim, Chang Heon Kim · Jeongbo gwahaghoe nonmunji. si'seu'tem mich i'lon · 2001
This paper proposes a measurable criterion called stitching reliability which reflects the stitching quality of panoramic mosaics. We also show that the stitching reliability recover the accurate focal length used for the automatic construction and visualization of mosaics. Current methods to extract the focal length from image sequences are not very robust because mis-stitched areas in general panoramas are used in theirs computation. From our method, the several images with high stitching reliability can be automatically selected to estimate the focal length, To measure the stitching reliability, our algorithm computes the difference between real and ideal position of image Intersection point for a camera rotational motion constraint. It is formally proved that the constraint is always satisfied in camera free rotation. Finally, experiments show that the proposed method provides less deviation of focal length than others, and improves the quality of panoramic mosaics.