Color separation in forensic image processing

In forensic image processing, it is often important to be able to separate a feature from an interfering background or foreground, or to demonstrate colors within an image to be different from each other. In this study, a color deconvolution algorithm that could accomplish this task is described, and it is applied to color separation problems in document and fingerprint examination. Subtle color differences (sometimes invisible to the naked eye) are found to be sufficient, which is demonstrated successfully for several cases where color differences were shown to exist, or where colors were removed from the foreground or background. The software is available for free in the form of an Adobe Photoshop-compatible plug-in.     

宋词中的“扇”意象及其内涵与情感基调

到了宋代,"扇"意象成为词中常见的意象之一.无论通过"扇"为女性代言,还是借女性"团扇"之悲写不遇之情,还是直言"扇"写词人自己的惜别、怀旧或是寄寓之情,总笼罩着一层颇为感伤的情感色彩.这与"扇"意象本身的文化积淀及宋词总体的情感基调有着密切的关系."扇"意象在宋词中得到更深更远的发展,充满永恒的艺术魅力.     

论社会歧视的社会心理根源及其消除方式--社会心理学视野下的社会歧视

社会歧视是指针对某一特殊社会群体的不公平、不合理、排斥性的社会行为或制度安排.从社会心理学看,这是由社会偏见这样一种不公正的、具有否定性和排斥性倾向的社会态度所导致的,属于一种刻板印象.但社会偏见并不一定导致社会歧视,实现这种转变与被歧视者自身力量相对弱小、"谈判力"不足相关.要减少或消除社会歧视,一方面必须壮大被歧视者的力量,增强其"谈判力",阻止已有的偏见向歧视的转化;另一方面通过被歧视者的努力,加强沟通来改变固有的刻板印象并防止新的刻板印象的产生.     

浅论媒介与女性形象的互动关系

对女性问题研究的主要目的,是消除性别误解,树立正确的性别印象。这就需要用"性别误解"这一概念取代"性别歧视",目的在于变性别等级为性别差异。广告和影视作品中流露的"性别误解",强化或改变了受众的性别印象,而受众的性别印象又是媒介表达的动力和来源。在这个过程中,媒介起了强大的作用,因此也承担着主要的责任。性别误解不仅仅是女性自身发展的障碍,也阻碍了整个人类社会的发展。大众传媒可以作为一支独立的力量,促进女性性别误解的改变,进而促进社会的和谐发展。     

FTIR图像—单点模式法无损鉴别不同品牌激光打印机墨粉色痕

利用傅里叶红外图像系统,采用单点模式对收集到的八种品牌激光打印机墨粉色痕进行红外扫描,采集样品红外光谱,并对其中两种样品红外光谱进行二阶导数运算,得到对应的二阶导数光谱。实验表明,该方法可有效区分不同品牌激光打印机墨粉色痕,并可为其他书写材料无损检验鉴定提供借鉴。     

影视剧作与彝汉史志中奢香夫人形象的比较研究

奢者夫人对边疆稳定、开发西部和祖国统一有过重大历史贡献,她在以影视剧为代表的艺术作品中的形象逐渐向"高、大、全"发展;而通过对彝文、汉文史志留下的资料碎片的分析,我们可以还原一个更加复杂、真实、伟大的少数民族女政治家的形象。     

Automated Texture Recognition of Quartz Sand Grains for Forensic Applications*

Quartz sand surface texture analysis has been automated for the first time for forensic application. The derived Basic Image Features (BIFs) provide computer-generated texture recognition from preexisting data sets. The technique was applied to two distinct classification problems; first, the ability of the system to discriminate between (quartz) sand grains with upturned plate features (indicative of eolian, global sand sea environments) and grains that do not exhibit these features. A success rate of grain classification of 98.8% was achieved. Second, to test the ability of the computer recognition system to identify specific energy levels of formation of the upturned plate surface texture features. Such recognition ability has to date been beyond manual geological interpretation. The discrimination performance was enhanced to an exact classification success rate of 81%. The enhanced potential for routine forensic investigation of the provenance of common quartz sand is indicated.     

Using anisotropic diffusion for efficient extraction of sensor noise in camera identification

Each digital camera has an intrinsic fingerprint that is unique to each camera. This device fingerprint can be extracted from an image and can be compared with a reference device fingerprint to determine the device origin. The complexity of the filters proposed to accomplish this is increasing. In this note, we use a relatively simple algorithm to extract the sensor noise from images. It has the advantages of being easy to implement and parallelize, and working faster than the wavelet filter that is common for this application. In addition, we compare the performance with a simple median filter and assess whether a previously proposed fingerprint enhancement technique improves results. Experiments are performed on approximately 7500 images originating from 69 cameras, and the results are compared with this often used wavelet filter. Despite the simplicity of the proposed method, the performance exceeds the common wavelet filter and reduces the time needed for the extraction.     

韩国人对华负面认知与中国对韩公共外交途径

中韩两国关系自建交以来在许多方面取得了飞速发展,但近些年,两国关系由"暖"变"冷",原因是多方面的,其中韩国人对中国形象的负面认知,产生了很大的负面影响。对此,我们不能视而不见或避而不谈,而应积极加强对韩公共外交,促进两国友好关系顺利发展。韩国是中国的重要邻国,中韩两国关系良好发展的意义不仅局限在两国关系上,它对于改善东北亚地区的安全局势也具有不可忽视的作用。本文主要就韩国人对中国形象的负面认知及其对中韩关系所起的负面影响作用以及应对之策,做简要分析和探讨。     

Exif信息在数码照片真实性鉴定中的应用

Exif信息检验是数码照片真实性鉴定的一个重要角度,如何充分挖掘和利用Exif信息对于数码照片真实性鉴定具有非常重要的意义.本文在JPEG格式分析基础上,介绍了Exif信息的提取方法,讨论了Exif的缩略图、压缩质量等信息在数码照片真实性鉴定中的应用.