Bootstrapping a better slant: A stratified process for recovering 3D metric slant

A slant removal algorithm

A robust optical character recognition (OCR) system has to be able to cope with slanted words. Such words may dramatically a!ect the performance of the segmentation algorithms. Even in cases where segmentation is not a prerequisite, the training procedure of the recognition module is more di$cult and complicated while attempting to cover slanted characters or words. Watanabe [1] conducted compa...

Common mechanisms for 2D tilt and 3D slant after-effects

By presenting oriented Gabor patches either monocularly or binocularly, we dissociated retinal orientation from perceived tilt and perceived slant. After adapting to binocular patches, with zero apparent tilt and non-zero slant, small tilt after-effects (TAEs) and large slant after-effects (SAE) were measured. Adapting to monocular patches with non-zero tilt and zero slant produced large TAEs a...

Dissociations between slant-contrast and reversed slant-contrast

A vertical test probe is misperceived as slanted in the opposite direction to an inducer when disparity specifies the inducer slant while monocular cues specify a frontoparallel surface (slant-contrast). In reversed cue conditions with vertical axis slant the test probe is misperceived as slanted in the same direction as the inducer (reversed slant-contrast). We found reliable slant-contrast an...

Recovering slant and angular velocity from a linear velocity field: modeling and psychophysics

The data from two experiments, both using stimuli simulating orthographically rotating surfaces, are presented, with the primary variable of interest being whether the magnitude of the simulated gradient was from expanding vs. contracting motion. One experiment asked observers to report the apparent slant of the rotating surface, using a gauge figure. The other experiment asked observers to rep...

Slant Grammar Calculus