Real-time panoramic mapping and tracking on mobile phones

Panoramic mapping on a mobile phone GPU

“…A similar real-time tracking method as in [15] is described by DiVerdi et al in [5]. The system called Envisor is capable of creating environment maps online.…”

“…As an extension to the approach of Wagner et al [15], Degendorfer [4] implemented a brightness correction method to enhance the image quality with an extended dynamic range. The strength of the seams is reduced, but they are not eliminated completely.…”

“…For AR purposes, Wagner et al created a method that captures an image with the camera of a mobile phone and maps it onto the panoramic image in real-time [15]. The approach takes the camera live preview feed as input and continuously extends the panoramic image, while the rotational parameters of the camera motion are estimated.…”

In-situ interactive modeling using a single-point laser rangefinder coupled with a new hybrid orientation tracker

“…Several methods have been proposed in the past for hybrid [1] or purely vision-based [3,6] orientation tracking. In [3], sparse optical flow is used for frame-to-frame tracking and heavyweight landmark features (SURF descriptors) are used to correct the drift.…”

“…However, continuous laser scanning requires accurate temporal estimate of the laser beam pointing direction while landmarks detection cannot be done every frame due to performance issues. In [6], a cylindrical environment map is built on the fly, in which FAST corners are detected and matched to the current frame. However, flattened cylinders have discontinuities on the left and right borders and suffer from nonlinearities along the vertical axis.…”