Laser data and optical data have a complementary nature to 3D features’ extraction. Building reconstruction by fusion of the two data sources can reduce the complexity of approaches from either side. In this paper we present a model refinement method, which uses the strong lines extracted from close-range images to improve building models reconstructed from terrestrial laser point clouds. First...

Optical modeling suggests that levels of retinal defocus routinely caused by presbyopia should produce phase reversals (spurious resolution−SR) for spatial frequencies in the 2 cycles/letter range known to be critical for reading. Simulations show that such reversals can have a decisive impact on character legibility, and that correcting only this feature of defocused images (by re-reversing co...

Motion of the patient during magnetic resonance imaging (MRI) introduces artifacts that can severely degrade the images. A method is proposed to correct for artifacts caused by translational motion, using only information contained in the MRI data. Initial simulation results show the algorithm to be effective in the presence of realistic noise levels. The method is suitable for routine clinical...