Typical methods for camera calibration and image rectification from a single view assume the existence of straight parallel lines from which vanishing points can be computed, or orthogonal structure known to exist in the scene. However, there are practical situations where these assumptions do not apply. Moreover, from a single family of parallel lines on the ground plane there is insufficient ...

Contrary to what many scholars hold, a case can be made for human population reduction (the practice of artificially decreasing the number of human beings on the Earth). Robin Attfield’s, Paul Taylor’s, Arne Næss’s and J. Baird Callicott’s theories are considered for justifying human population reduction; however, only Næss’s actually justifies reduction. Another argument for human population r...

SUMMARY This study investigates a band extension technique for narrow-band telephony speech. The proposed technique employs full wave rectification that nonlinearly generates high-band overtones from the low band. In order to improve the conventional technique, this study investigates a frame-by-frame gain control based on the estimation of gain parameter from narrow-band telephony speech. A su...

Automatic change detection and data updating is a very important issue for keeping the temporal accuracy and currency of spatial data sets. The problems and difficulty of current change detection techniques are presented in this paper. According to whether registration is done before change detection algorithms, authors classify change detection into two categories: change detection after image...

This paper proposes a method for a mosaic digital representation of a road by means of a Kalman filter based rectification of a monoscopic image sequence acquired with a low-cost MMS without INS sensors. The frontal images of the road acquired by a pointing ahead-down camera are rectified onto the road surface by means of a homographic transformation among image and ground planes. As basic idea...

We describe the geometry, constraints and algorithmic implementation for metric rectification of planes. The rectification allows metric properties, such as angles and length ratios, to be measured on the world plane from a perspective image. The novel contributions are: first, that in a stratified context the various forms of providing metric information, which include a known angle, two equal...

An optimal stereo sequence needs to be rectified in order to avoid vertical disparities and similar image distortions. However, due to imperfect stereo rigs, vertical disparities occur mainly due to a mechanical misalignment of the cameras. Several rectification methods are known, most of them are based on a strong calibration. However, calibration data is often not provided, such that the rect...

Geometric rectification of airborne multispectral scanner image data using traditional polynomial functions often cannot provide satisfactory RMSE accuracy due to the complex nature of geometric distortions in the data. The discrete approach to rectifying these data generates segmented pieces that may cause edge-matching problems after they are reassembled. To improve the rectification accuracy...