基于颜色特征的茄子病害图像检索方法

为克服当前蔬莱病害诊断专家系统依靠文字提供信息的不准确性,提出一种基于颜色特征的茄子病害图像检索方法.详细分析茄子病害图像的颜色特征,在符合人眼视觉特征的HIS颜色空间上进行图像预处理.提取图像的均值、方差、偏度、峰度、能量作为检索特征值,构建图像特征矩阵.利用高斯归一化方法进行归一化处理后,采用欧式距离进行相似性度量.在Visual C+ +6.0开发环境下,采用C++编程开发了基于颜色特征的茄子病图像检索系统.结果表明,基于颜色特征的茄子病害图像检索方法的查准率为65%,查全率为83%,识别效果较好.将该算法应用于茄子病害诊断专家系统,将大大提高系统的鲁棒性,能够满足病害诊断的要求.     

一种高度自动化的三维CT数据腰椎分割方法

针对现有分割方法,分别存在无法完全分割、不能适应所有数据或过多的手动干预等局限性问题,提出了一种用于CT图像单节腰椎分割的新方法.首先从CT图像中分割整条脊椎,然后再分别断开单个椎体和椎小关节,从而使待分割的一节腰椎与其他部位分离.利用人造数据和真实数据对本方法进行了评估,结果显示本法可以高度自动化地分割任意单节腰椎.本方法是医生进行辅助诊断的重要方法,在相关领域的研究中具有广泛意义.     

基于数据融合的智能医疗辅助诊断方法

医生诊断需要结合临床症状、影像检查等各种数据,基于此,提出了一种可以进行数据融合的医疗辅助诊断方法。将患者的影像信息（如CT图像）和数值数据（如临床诊断信息）相结合,利用结合的信息自动预测患者的病情,进而提出了基于深度学习的医疗辅助诊断模型。模型以卷积神经网络为基础进行搭建,图像和数值数据作为输入,输出病人的患病情况。该医疗辅助诊断方法能够利用更加全面的信息,有助于提高自动诊断准确率、降低诊断误差;另外,仅使用提出的医疗辅助诊断模型就可以一次性处理多种类型的数据,能够在一定程度上节省诊断时间。在两个数据集上验证了所提出方法的有效性,实验结果表明,该方法是有效的,它可以提高辅助诊断的准确性。      

改进遗传算法在雾天图像清晰化中的应用

将改进遗传算法应用于雾天图像的区域分割,从而使图像清晰化.该方法首先用遗传算法求出近景和远景的分割阈值将图像分割出来,然后通过移动模板对整个图像进行相应的清晰化处理,防止区域边界效应的产生,最后对获取的图像进行信息融合,进一步提高图像质量.通过试验证实了该算法能有效改善雾天图像的退化现象,提高图像的清晰度.     

关于高分辨率遥感影像融合的研究——高分辨率遥感影像融合方法及优缺点

遥感图像融合技术是信息融合的一个重要分支,它强化了遥感图像中的有用信息,提高了对遥感图像理解的可靠性,使使用者能获得对图像分析更为准确的结果。     

创意图像设计数字化资源管理

从二十世纪后期五联网文化的快速发展,对于艺术设计乃至艺术设计的教育都有着深远的影响.对课程数字化的管理成为当今教育发展的重要趋势,创意图像设计课程作为以图像为载体的艺术设计课程,通过互联网技术快速掌握世界图像设计发展的动向,身临其境的感受大师们的生活与创作,接轨国际:同时,互联网也使图像设计教学更加灵活,大量的设计信息极大丰富了学生的创作资源.创意图像设计课程结合教学需求,从优秀图像设计案例库、图像设计素材资源库以及优秀学生作品资源库对教学资源与教学成果进行数字化管理,全方位提升"教""学"质量.     

便携式数字检眼镜光学系统设计

本文根据临床眼底检查要求,在传统直接检眼镜和眼底照相机基础上,针对便携式数字检眼镜的光学系统进行了优化设计.在照明系统中采用中空反射镜形成环形照明光源,避免了角膜反射光和杂散光.在成像系统设计上,运用ZEMAX软件对成像系统进行设计优化,成像物镜全部用球面,提高了系统的性价比.通过补偿镜设计,保证了不同屈光能力的眼睛的眼底图像能够通过CCD成像系统传入液晶显示模块,可进行相应的显示、存储,并可上传PC机,进行后期图象数据处理.     

基于图像片的模糊C均值聚类图像分割

本文提出了一种全新的基于图像片的模糊C均值聚类的图像分割方法.将图像片的思想引入聚类分割中,提出IPFCM方法,用局部的图像片来代替聚类分割中的像素点,从而增大不同类别之间的差异,并对隶属度更新函数进行改造使隶属度函数分布具有单峰值性.实验结果表明,本文方法具有较强的抗噪性和较高的分割精度,图像的隶属度函数与理想隶属度函数十分接近.同时无需过多控制参数,具有较强的可靠性和适应性.另一方面,本文将聚类中心的每一个成员扩展为一个向量,并给出了向量聚类中心的更新公式,为日后将多种图像特征加入FCM对图像进行分割提供了充分的理论基础.     

基于马氏距离和模糊C均值聚类的抠图算法与应用

基于马氏距离和模糊C均值聚类算法提出了一种数字彩色图像抠图算法.该算法首先对彩色图像像素的红绿蓝三种彩色分量进行正则化处理;然后在正则化图像背景中选取适当的掩膜作为样本集,计算各像素与样本集之间的马氏距离;再利用模糊C均值聚类算法对计算出的马氏距离进行分类;最后利用填洞操作提高抠图质量.对八幅彩色数字图像进行对比实验,结果显示本算法可以自动抠图,且结果优于马氏距离算法、Grow-Cut算法和正则化线性回归算法的相应抠图效果.      

基于五维超混沌的全球信息栅格图像加密算法

为解决全球信息栅格的网络数据的安全问题,提出新的基于五维超混沌系统的图像加密算法,给出全球信息栅格通信体系的基于超混沌的图像加密方案.对生成的两个超混沌序列进行预处理,并置乱图像的像素位置.最后,选择一个混沌序列进行预处理后对图像像素值加密,以改变灰度值.仿真分析结果表明,该加密算法密钥空间大,密钥选择敏感,具有很高的安全性和很好的加密效果.     

Clinical image evaluation

The radiologist interpreting mammograms is responsible for an ongoing evaluation of the quality of the initial images produced by the facility. The Mammography Quality Standards act requires an external review of clinical images at least every 3 years from each facility accredited. Clinical image evaluation includes an assessment of position and compression, labeling, image quality, and artifacts. For each of these assessment categories, specific criteria have been identified for distinguishing properly performed from deficient clinical images.     

Time and image

A 23-year-old man presented with progressive exercise-related dyspnea and easy fatigability. He gave a history of a murmur of aortic insufficiency since childhood. Cardiac catheterization demonstrated severe aortic insufficiency. At surgery the patient was found to have prolapse of the right coronary cusp into a significant supracristal ventricular septal defect. Repair was carried out with a Dacron patch closure of the septal defect and replacement of the valve with a 29-mm St. Jude valve. The patient recovered uneventfully and is fully active and employed 5 years later. Review of the literature documents that this is an uncommon lesion. The approaches to preoperative diagnosis include transesophageal echo. The management techniques have included ventricular septal defect closure, alone and with valvuloplasty, and septal defect closure with aortic valve replacement. The anatomic and patient characteristics guide selection of the most suitable management of these patients.     

The mental image.

Although neglected by cognitive psychologists, mental imagery appears to have played a crucial role in far-reaching scientific developments. Without assuming anything about the internal processes underlying visual images, such images can be studied in relation to their corresponding external objects. The results from a series of previously conducted experiments indicate that mental imagery is remarkably able to substitute for actual perception. Ss made the same judgments about objects in their absence as in their presence; Ss who imagined a particular object were uniquely fast and accurate in discriminatively responding to related external test stimuli, and in the process of imagining a spatial transformation, Ss passed through states with a demonstrable one-to-one relation to corresponding states in the external world. Rules governing spatial structures and transformations, having been incorporated into our perceptual machinery by eons of evolution in a 3-dimensional world, are now at the service of creative thought. (61 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

高炉料面红外摄像仪及计算机图像处理系统的开发应用

1 概述 高炉是一个在高温高压条件下冶炼生铁的密闭反应器。目前,高炉工长主要通过常规的温度、压力、流量和煤气成分等检测结果来判断炉况、操作高炉。对高炉工长来说,高炉仍然是一个黑匣子。根据高炉操作的需要,开发高炉炉内监测技术,使高炉工长能及时了解高炉炉内的状况,变被动操作为主动操作是炼铁工作者梦寐以求的愿望。     

Surveying psychology's public image.

Psychologists have been interested in their public image since the organization of the American Psychological Association nearly 100 yrs ago. Yet formal surveys of the public's opinions about and understanding of psychology are more recent, dating from the 1940's. The published and unpublished surveys of psychology's public image to date are reviewed, and data from a recent telephone survey of 201 respondents (aged 18+ yrs) in 4 metropolitan areas are presented. Like earlier surveys, results of the present survey show that most people hold generally favorable attitudes toward psychology but are only marginally sophisticated in their understanding of the field. Specifically, the public is somewhat aware of both the scientific and clinical endeavors of psychologists. However, the public has virtually no understanding of the impact of psychology on their lives. These findings are compared with earlier findings. (47 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Spatially varying Bayesian image estimation

OBJECTIVES: New methods are available to immortalize parenchymal cells from exocrine glands and kidney with retention of differentiation. Adaptation of this technology to small, single-donor biopsy material or surgical specimens could provide genetically homogeneous cells for functional analyses and correlation with genetic background and underlying biochemistry. To develop a methodology useful for renal sodium metabolism, epithelial cell line generation was tested in a hypertensive rat model with features similar to salt-sensitive hypertension in humans. This form of hypertension has a large genetic component and is prevalent in African Americans. DESIGN: Protocols were designed to immortalize primary cultures of microdissected proximal tubule epithelial cells from spontaneously hypertensive (SHR) and control, normotensive Wistar-Kyoto (WKY) rats. Immortalization was based on a replication-defective retrovirus coding for SV40 large T-antigen as positive cell cycle regulator. Transport competent cells that grow on porous filters to form confluent monolayers were selected. RESULTS: Several proximal tubule cell lines have been developed from SHR and WKY rats. The cells retain important differentiated features, such as epithelial polarity, low monolayer conductance, and sodium-succinate cotransport. They are suitable for analyses of electrolyte transport by electrophysiology or imaging of intracellular fluorescent indicator dyes, such as sodium-binding benzofuran isophthalate. CONCLUSION: Feasibility of generating epithelial cell lines from defined renal segments was demonstrated. The cells retain important transport function so that analyses of sodium metabolism and the influence of genetic background on it are possible. The methodology is applicable to human specimens.     

Physiological investigations by image analysis

Cataract formation in diabetic lenses has been attributed to polyol-osmotic pressure-generated influx of water. The ensuing swelling in the form of pocket and lake accumulations cause light scattering. The authors tested whether clear lenses of diabetic patients show different hydration properties than age matched normal lenses. Normal and diabetic human lenses were investigated for their nonfreezable water content by differential scanning calorimetry. The total water content of the lens sections were studied by thermogravimetric analysis. Non-cataractous diabetic lenses in all three regions showed a higher total water content than normal lenses. The nonfreezable water content, seems to increase with age in diabetic lenses and decrease with age in normal human lenses. Thus, hydration changes in human diabetic lenses precede cataract formation. While syneresis, the release of bound water into the bulk, is part of the normal aging process, it appears to occur in the younger diabetics only. In older diabetics syneresis is halted or even reversed. This may be due to the glycation of lens proteins in diabetic patients which tends to immobilize water and therefore, reverse the syneresis due to aging.