Title :
Using saddle points for subpixel feature detection in camera calibration targets
Author :
Lucchese, Luca ; Mitra, Sanjit K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA
Abstract :
The determination of reliable features with subpixel accuracy is an important requirement of any camera calibration algorithm. This paper offers a simple and computationally attractive method for extracting X-junctions with subpixel precision from images of calibration checkerboards by showing how the saddle points associated with them can be determined without any surface fitting required by standard feature detection algorithms.
Keywords :
calibration; cameras; computer vision; feature extraction; X-junctions; calibration checkerboards; camera calibration targets; feature detection algorithms; saddle points; subpixel accuracy; subpixel feature detection; Calibration; Cameras; Computer vision; Detectors; Face detection; Focusing; Gaussian noise; Pixel; Signal to noise ratio; Surface fitting;
Conference_Titel :
Circuits and Systems, 2002. APCCAS '02. 2002 Asia-Pacific Conference on
Print_ISBN :
0-7803-7690-0
DOI :
10.1109/APCCAS.2002.1115151
