GROUND STEREOPAIR PHOTOGRAPHS

Detecting Ground Shadows in Outdoor Consumer Photographs

Detecting shadows from images can significantly improve the performance of several vision tasks such as object detection and tracking. Recent approaches have mainly used illumination invariants which can fail severely when the qualities of the images are not very good, as is the case for most consumer-grade photographs, like those on Google or Flickr. We present a practical algorithm to automat...

Photographs

The Precision Analysis of 3d Reconstruction Based on Generalized Stereopair

According to the idea of realizing the 3D reconstruction using different images obtained from different sensors, this paper focuses on the different-source high resolution remotely sensed imagery covering the same regions, constructs the generalized stereopairs, and investigates the space intersection mathematics models based on RFM. Then quickly extracts the ground 3D information, and realizes...

Co-registration and correlation of aerial photographs for ground deformation measurements

We describe and test a procedure to accurately co-register and correlate multi-temporal aerial images. We show that this procedure can be used to measure surface deformation, and explore the performance and limitations of the technique. The algorithms were implemented in a software package, COSI-Corr (available from the Caltech Tectonics Observatory website). The technique is validated on sever...

3D Model Generation for Cities Using Aerial Photographs and Ground Level Laser Scans

In this paper we describe techniques for 3D textured model construction of urban areas using acquisition devices such as intensity cameras, as well as 2D laser scanner. Our experimental set up consists of a truck equipped with one camera and two fast, inexpensive 2D laser scanners, traveling on city streets under normal traffic conditions. The horizontal laser scans are used to determine the ap...