PERSPECTIVE APPROXIMATIONS

被引:72
作者
ALOIMONOS, JY [1 ]
机构
[1] UNIV MARYLAND,INST ADV COMP STUDIES,COLLEGE PK,MD 20742
关键词
orthoperspective; paraperspective; perspective approximations;
D O I
10.1016/0262-8856(90)90064-C
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
In recent years, researchers in computer vision working on problems such as object recognition, shape reconstruction, shape from texture, shape from contour, pose estimation, etc., have employed in their analyses approximations of the perspective projection as the image formation process. Depending on the task, these approximations often yield very good results and present the advantage of simplicity. Indeed when one relates lengths, angles or areas on the image with the respective units in the 3D world assuming perspective projection, the resulting expressions are very complex, and consequently they complicate the recovery process. However, if we assume that the image is formed with a projection which is a good approximation of the perspective, then the recovery process becomes easier. Two such approximations, are described, the paraperspective and the orthoperspective, and it is shown that for some tasks the error introduced by the use of such an approximation is negligible. Applications of these projections to the problems of shape from texture, shape from contour, and object recognition related problems (such as determining the view vector and pose estimation) are also described. © 1990.
引用
收藏
页码:179 / 192
页数:14
相关论文
共 11 条
[1]   SHAPE FROM PATTERNS - REGULARIZATION [J].
ALOIMONOS, J ;
SWAIN, M .
INTERNATIONAL JOURNAL OF COMPUTER VISION, 1988, 2 (02) :171-187
[2]   SHAPE FROM TEXTURE [J].
ALOIMONOS, J .
BIOLOGICAL CYBERNETICS, 1988, 58 (05) :345-360
[3]  
ALOIMONOS J, 1987, THESIS U ROCHESTER N
[4]  
[Anonymous], 1950, PERCEPTION VISUAL WO
[5]   3D OBJECTS RECOGNITION BY OPTIMAL MATCHING SEARCH OF MULTINARY RELATIONS GRAPHS [J].
BENARIE, J ;
MEIRI, AZ .
COMPUTER VISION GRAPHICS AND IMAGE PROCESSING, 1987, 37 (03) :345-361
[6]  
CONNOLLY C, 1987, 1ST P INT C COMP VIS, P65
[7]  
DEMENTHON D, 1989, CARTR471 U MARYL COM
[8]  
Horn B., 1986, ROBOT VISION, DOI DOI 10.1137/1030032
[9]  
LIPSCHUTZ G, 1969, DIFFERENTIAL GEOMETR
[10]  
OHTA Y, 1981, P INT JOINT C ART IN, P746