Aging and availability of binocular disparity and pictorial depth cues in 3D graphics contents

Some stereoblind observers do not perceive depth of 3D stimuli that depends on binocular disparity. These individuals, who have no disabilities, comprise over 5% of the general population. In addition, 17–30% of nonstereoblind young and young–middle people do not use disparity information in certain 3D environments, a phenomenon known as pseudo‐stereoblindness. This study aimed to investigate the relationship between aging and the proportion of pseudo‐stereoblindness in the general population. In an experiment, 134 nonstereoblind participants, ranging in age from 17 to 83 years, judged subjective depth of 3D stimuli containing binocular disparity and pictorial depth cues. Results showed that the proportion of pseudo‐stereoblindness among young (17–24 years old) and young–middle aged observers (25–39 years old) was 29%, in both cases. However, the proportion of pseudo‐stereoblind observers increased in older populations: 65% and 82% in the middle (40–54 years old) and senior (55–83 years old) age groups, respectively. These results suggest that a number of people, especially in elderly populations, have trouble perceiving depth from binocular disparity in 3D graphic contents despite their essential ability to use disparity information.     

基于人体图模型和背景减除的姿势估计

自然场景或电视剧中的人物,其姿势、背景、轮廓、大小总是不断发生变化,人体姿势估计是计算机视觉中具有挑战性的课题之一。针对静态图像中的人体姿态估计容易受背景的影响而又没有合适的背景提取方法,先大致确定人体范围,将调整的检测框的大小作为grabcut的输入,利用grabcut的分割结果确定出人所在的前景,进一步利用图像的边缘信息和区域信息推断出人体的姿势,最后通过实验证明了该方法的有效性。     

Texture-based pattern retrieval from image databases

Recent technological advances have made it possible to process and store large amounts of image data. Perhaps the most impressive example is the accumulation of image data in scientific applications such as medical or satellite imagery. However, in order to realize their full potential, tools for efficient extraction of information and for intelligent searches in image databases need to be developed. This paper describes a new approach to image data retrieval which allows queries to be composed of local intensity patterns. The intensity pattern is converted into a feature representation of reduced dimensionality which can be used for searching similar-looking patterns in the database. This representation is obtained by filtering the pattern with a bank of scale and orientation selective filters modeled using Gabor functions. Experimental results are presented which illustrate that the proposed representation preserves the perceptual similarities, and provides a powerful tool for content-based image retrieval.     

一个高效的图像库检索模型

多媒体数据库主要研究如何对数据库庞杂的多媒体数据进行存取、检索等管理。图像库在许多未来的应用中将会作为一个重要的部分。该文通过对传统图像库检索系统的改进,提出一个高效的图像库检索模型。它首先通过神经网络方法对图像进行分类,然后通过数据挖掘中的方法完善属性值,最后通过近似匹配检索出所需要的图像。     

End-to-end scene text recognition using tree-structured models

Detecting and recognizing text in natural images are quite challenging and have received much attention from the computer vision community in recent years. In this paper, we propose a robust end-to-end scene text recognition method, which utilizes tree-structured character models and normalized pictorial structured word models. For each category of characters, we build a part-based tree-structured model (TSM) so as to make use of the character-specific structure information as well as the local appearance information. The TSM could detect each part of the character and recognize the unique structure as well, seamlessly combining character detection and recognition together. As the TSMs could accurately detect characters from complex background, for text localization, we apply TSMs for all the characters on the coarse text detection regions to eliminate the false positives and search the possible missing characters as well. While for word recognition, we propose a normalized pictorial structure (PS) framework to deal with the bias caused by words of different lengths. Experimental results on a range of challenging public datasets (ICDAR 2003, ICDAR 2011, SVT) demonstrate that the proposed method outperforms state-of-the-art methods both for text localization and word recognition.     

Affective priming with subliminally presented pictures.

Affective priming studies have demonstrated that subliminally presented prime words can exert an influence on responses towards positive or negative target stimuli. In the present series of experiments, it was investigated whether these findings can be extended to pictorial stimuli. Ideographically selected positive, neutral, and negative picture primes that were sandwich-masked immediately preceded positive or negative target pictures (Experiment 1) or words (Experiments 2 & 3). Evaluative categorization responses to these target stimuli were significantly influenced by the valence of the prime. First, it was demonstrated that high anxious participants were selectively slowed when the subliminally presented prime was negative (Experiments 1 & 2). Second, the affective congruence between primes and targets also exerted an influence on the responses, but in a direction that is opposite to what is typically observed in affective priming research. These reverse priming effects are situated within a series of recent similar findings, and implications for theories of affective priming are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Relationships between child training and the pictorial arts.

Pictorial art of 30 nonliterate cultures was rated on several variables of art style, 11 of which were related to each other on a complexity of style dimension. These variables were correlated with a measure of severity of socialization. Complexity of style tended to be positively related to severity of socialization. Possibly, a personality characteristic is related to both severity of socialization and complexity of art style. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

常用轴测投影图在工程中的选择与应用

轴测投影图由于富有立体感、具有较好的度量性、作图简便,在工程中得到了广泛的应用.从图形直观性和作图简便程度出发,阐述了在实际工程中怎样选择合适的轴测投影图表达实体,以及不同的专业领域选用不同种类的轴测投影图.     

交互绘图参数化过程的实现

在屏幕上交互作图的同时,生成参数化图形。这是ＣＡＤ的一项关键技术。这种参数化图形的柔性和可分性使图形具有可继承性和可扩充性,其使用的简便性将有利于ＣＡＤ技术在工程界推广使用,本文叙述了在ＡＵＴＯＣＡＤ中实现交互图形参数化的技术难点及实现方法。     

Health condition monitoring with multiple physical signals in tensile test for double-material friction welding

The manifold physical signals including micro resistance,infrared thermal signal and acoustic emission signal in the tensile test for double-material friction welding normative samples were monitored and collected dynamically by TH2512 micro resistance measuring apparatus,flir infrared thermal camera and acoustic emission equipment which possesses 18 bit PCI-2 data acquisition board.Applied acoustic emission and thermal infrared NDT(non-destructive testing) means were used to verify the feasibility of using resistance method and to monitor dynamic damage of the samples.The research of the dynamic monitoring system was carried out with multi-information fusion including resistance,infrared and acoustic emission.The results show that the resistance signal,infrared signal and acoustic emission signal collected synchronously in the injury process of samples have a good mapping.Electrical,thermal and acoustic signals can more accurately capture initiation and development of micro-defects in the sample.Using dynamic micro-resistance method to monitor damage is possible.The method of multi-information fusion monitoring damage possesses higher reliability,which makes the establishing of health condition diagnosing and early warning platform with multiple physical information monitoring possible.