已为您找到该学者16条结果 成果回收站
【期刊论文】Deformable Template Combining Alignable and Non-alignable Sketches
董军宇, Linjie Zhang, , Haifeng Gong, Tianfu Wu and Junyu Dong
,-0001,():
-1年11月30日
This paper proposes a hybrid model for deformable template which combines alignable and non-alignable sketches. These sketches are subject to slight or considerable translations in different images. For slight translations, Wu et al [13] proposed active basis model to capture them, where each sketch is allowed to shift in position and orientation. For larger translations of sketches, [13] assumed that they follow the same distribution as sketches of natural image ensembles, which need not be explicitly modeled. But in fact, for a specified object class, the unaligned sketches follow a totally different distribution from those of natural images. We summarize these sketches by their means in the foreground mask. We treat the mean value in each direction as independent features and fit their marginal distributions on object ensemble and natural image ensemble using Gaussian distribution. The marginal distributions are combined with Active Basis into a joint probability ratio to distinguish foreground object from natural background. Experiments are conducted on 14 object classes, most of which show considerable improvement in ROC.
-
67浏览
-
0点赞
-
0收藏
-
0分享
-
61下载
-
0
-
引用
【期刊论文】Measuring the refractive indices of liquids with a capillary tube interferometer
董军宇, Ailing Yang, Wendong Li, Guang Yuan, Junyu Dong, and Jinliang Zhang
APPLIED OTICS Vol. 45, No.31 1 November 2006,-0001,():
-1年11月30日
A theoretical analysis of the fringe pattern produced by a capillary tube interferometer is presented, which is expected to be two-beam interference, and a computer program to simulate the interference fringe pattern is established. By comparing the simulated fringe pattern and the experimental fringe pattern, the refractive index of the liquid can be given when the two fringes coincide best. The results of this method are close to those of the Abbe refractometer.
-
36浏览
-
0点赞
-
0收藏
-
0分享
-
122下载
-
0
-
引用
【期刊论文】REMOVING SHADOWS FROM A SINGLE REAL-WORLD COLOR IMAGE
董军宇, Kang Yao, Junyu Dong*
,-0001,():
-1年11月30日
In this paper, we propose a new algorithm to remove shadow from a single color image. We first project log-log chromaticity coordinates onto an angle of illuminationinvariant direction to obtain an illumination independent grayscale image. Then color information is added back by comparing intensities in the original and illuminationinvariant grayscale images, and taking both global tonality and pixel-wise color into account. Finally, the result color image without shadow is recovered. The proposed method simplifies the color restoration procedure and therefore requires much less computation. Experimental results show that the new method can produce shadow-free images with same quality as those shown in previous work.
Shadow removal,, illumination invariance,, color restoration
-
44浏览
-
0点赞
-
0收藏
-
0分享
-
167下载
-
0
-
引用
董军宇, 刘文斌
模糊系统与数学,2000,14:326~328,-0001,():
-1年11月30日
本文首先给出了几种模糊向量排序法,由此建立了新的综合评判的数学模型,并用于反避税工作中企业利润评估,得到了较好的效果。文章最后对综合评判有关问题进行了讨论。
模糊向量排序法, 综合评判, 利润评估, 反避税
-
30浏览
-
0点赞
-
0收藏
-
0分享
-
17下载
-
0
-
引用
-
25浏览
-
0点赞
-
0收藏
-
0分享
-
14下载
-
0
-
引用