Chess Piece Recognition Using Oriented Chamfer Matching with a Comparison to CNN

Author(s):  
Youye Xie ◽  
Gongguo Tang ◽  
William Hoff
Keyword(s):  
2017 ◽  
Vol 11 (12) ◽  
pp. 1265-1272
Author(s):  
Lifei Bai ◽  
Xianqiang Yang ◽  
Huijun Gao

Author(s):  
Quentin Goffette ◽  
Nathalie Suarez Gonzalez ◽  
Raphaël Vanmechelen ◽  
Erik Verheyen ◽  
Gontran Sonet

1995 ◽  
Vol 1 (4) ◽  
pp. 245-259 ◽  
Author(s):  
J. You ◽  
E. Pissaloux ◽  
W.P. Zhu ◽  
H.A. Cohen

Author(s):  
David A. Hinton

The trend away from ornamented brooches, rings, and swords that demonstrates changing social pressures and expression during the eleventh century was maintained in the first half of the twelfth. The Anglo-Norman aristocracy had considerable wealth for its castles and churches, but the spending power of the Anglo-Saxon majority was very much diminished by the impositions that followed the Conquest. Social relations among the former were based primarily on land, and although sentiments of personal loyalty were defined by oaths of fealty, there is no record of gift-giving from lord to retainer other than the increasingly formalized bestowal of arms. Towns were growing both in size and number, but only a few merchants were really rich, and the peasantry in the countryside was increasing in number but had decreasing opportunity for individual advancement. Excavations at castles and other baronial residences generally yield the evidence of martial appearance and activity that would be expected, like spurs, and slightly more evidence of wealth, with coins a little more profligately lost, than at other sites. There are also luxuries like gilt strips, from caskets of bone or wood, and evidence of leisure activities, such as gaming-pieces; chess was being introduced into western Europe, and appealed to the aristocracy because it was a complicated pastime that only the educated would have time to learn and indulge in. Furthermore, it could be played by both sexes, though ladies were expected to show their inferior skill and intelligence by losing to the men; it echoed feudal society and its courts; and it could be played for stakes. An occasional urban chess-piece find, not always well dated, shows that a few burgesses might seek to emulate the aristocracy. Other predominantly castle finds include small bone and copper-alloy pins with decorated heads that have been interpreted as hairpins, as at Castle Acre, attesting a female presence, but other personal ornaments are infrequent. Some pictures in manuscripts suggest that in the early twelfth century the highest ranks of the aristocracy were wearing brooches. These were probably conventional representations, however, as there are no valuable brooches or finger-rings in the archaeological record, as there had been earlier.


Symmetry ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 680
Author(s):  
Ethan Jones ◽  
Winyu Chinthammit ◽  
Weidong Huang ◽  
Ulrich Engelke ◽  
Christopher Lueg

Control of robot arms is often required in engineering and can be performed by using different methods. This study examined and symmetrically compared the use of a controller, eye gaze tracker and a combination thereof in a multimodal setup for control of a robot arm. Tasks of different complexities were defined and twenty participants completed an experiment using these interaction modalities to solve the tasks. More specifically, there were three tasks: the first was to navigate a chess piece from a square to another pre-specified square; the second was the same as the first task, but required more moves to complete; and the third task was to move multiple pieces to reach a solution to a pre-defined arrangement of the pieces. Further, while gaze control has the potential to be more intuitive than a hand controller, it suffers from limitations with regard to spatial accuracy and target selection. The multimodal setup aimed to mitigate the weaknesses of the eye gaze tracker, creating a superior system without simply relying on the controller. The experiment shows that the multimodal setup improves performance over the eye gaze tracker alone ( p < 0.05 ) and was competitive with the controller only setup, although did not outperform it ( p > 0.05 ).


2014 ◽  
Vol 10 (01) ◽  
pp. 69-90 ◽  
Author(s):  
CHENGUANG LIU ◽  
HENGDA CHENG ◽  
ARAVIND DASU

Head pose estimation has been widely studied in recent decades due to many significant applications. Different from most of the current methods which utilize face models to estimate head position, we develop a relative homography transformation based algorithm which is robust to the large scale change of the head. In the proposed method, salient Harris corners are detected on a face, and local binary pattern features are extracted around each of the corners. And then, relative homography transformation is calculated by using RANSAC optimization algorithm, which applies homography to a region of interest (ROI) on an image and calculates the transformation of a planar object moving in the scene relative to a virtual camera. By doing so, the face center initialized in the first frame will be tracked frame by frame. Meanwhile, a head shoulder model based Chamfer matching method is proposed to estimate the head centroid. With the face center and the detected head centroid, the head pose is estimated. The experiments show the effectiveness and robustness of the proposed algorithm.


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