共查询到20条相似文献,搜索用时 112 毫秒
1.
视频图象分析处理系统应用研究 总被引:2,自引:0,他引:2
本文描述了一种基于视频图象的分析处理系统,结合工程应用实践,提出利用微机终端显示器作为象框坐标测量器,实现对视频图象的分析处理.不仅具有丰富的数字图象处理功能,还可对原始图象进行增强和细分等处理. 相似文献
2.
3.
报道一套基于解释脉冲程序的MRI的计算机模拟软件,可适用于任意脉冲序列成象方法的计算机模拟,该软件包括成象物理模型的建立,成象物理过程的模拟,基于K空间的时域FID信号的重组,多维傅立叶交换重建图象,多维滤波反投影重建图象.图象显示等功能模块;分析了成象的物理过程的基本原理和软件的设计思想.并以GE成象和SEPI快速成象方法为例进行了模拟,实现了图象重建. 相似文献
4.
5.
微粒场全息图象亮度不均匀,会给图象处理中的二值化处理结果带来影响.本文针对亮度不均匀产生的原因进行理论分析,采用同态滤波图象增强方法对其进行亮度校正.通过计算机模拟分析和实验验证,证实了同态滤波图象增强方法是二值化之前对亮度校正的有效预处理方法。 相似文献
6.
7.
肺癌荧光图象的伪彩色增强处理 总被引:5,自引:0,他引:5
近年来,作者开发了肿瘤荧光成象法用于诊断和定位早期支气管癌.由于所获得的荧光图象使用了象增强器进行增益放大,因此还消除了肺癌荧光图象的彩色信息.本文给出了一种荧光图象伪彩色增强处理的方法,并证实了伪彩色增强技术用于早期肺癌荧光诊断的可行性.经增强处理后,内镜医生只要根据彩色视频图象中与黑白荧光图象强度相对应的颜色就可以鉴别肺癌存在与否.同增强处理前的黑白图象相比,医生从伪彩色图象中获得了病灶内部结构、边缘效果和立体感方面的更多信息.临床结果表明可疑组织与正常组织之间获得了足够高的颜色衬比,有助于诊断早期肺癌病灶. 相似文献
8.
9.
10.
噪音对光学图象浑沌相位列阵加密和解密的影响 总被引:1,自引:0,他引:1
本文提出了一种用浑沌相位列阵对光学图象加密和解密的方法,并重点分析了加法高斯白噪音对光学图象浑沌相位列阵加密和解密的影响.通过计算机模拟发现加密后的图象与原图象相比,抗振幅噪音的能力增强,而抗相位噪音的能力下降.在一定信噪比范围内,相位噪音是影响解密图象质量的主要因素. 相似文献
11.
This work presents an eye-tracking and pupil size-measuring device that interfaces with a computer for applications useful in psychometry, ophthalmology, physiology and virtual reality (VR) systems. This system utilizes a change-coupled device (CCD) camera, appropriate lenses, PC with frame grabber and a DSP unit with various types of VR equipment, i.e., HMD, simulator or LCD projection device. The digital signal processing unit is used to calculate the average brightness and contrast of the VR video image. A CCD camera with various attachments can be mounted on various VR systems to capture the human eye image for testing. An image capture card and a personal computer are used to analyze the test image. From the eye digital image, the computer obtains data on the pupil size and a trace of the tested eye. A pattern recognition computer program and five measurement parameters are used to distinguish the position of the pupil, calculate the pupil location coordinate and analyze the physical conditions of the user. These data can be plotted against the average brightness and contrast of the VR video image in real time. This information is shown on the screen of a personal computer and used for cross-link analysis. This eye-tracking interface can determine the position of a subject's pupil and map that position into a display point on a computer screen. The pupil size and location data versus the average brightness and contrast of a VR video image are computed in real time. 相似文献
12.
13.
14.
高速RS422总线数字视频采集系统 总被引:2,自引:2,他引:0
介绍了一种基于RS422数字接口的PCI总线的单通道数字视频采集系统,可实现30帧/s的1024×1024像元10bit的数字视频采集。系统的核心技术是利用高速数据采集卡进行实时数字图像信号采集,并持续的将采集来的信号数据记录到计算机硬盘上。采集部分可用于PCI总线的视频系统或独立的视频设备中。 相似文献
15.
Chern-Sheng Lin Chien-Wa Ho Chao-Ning Chan Chi-Re Chau Yieng-Chiang Wu Mau-Shiun Yeh 《Optics & Laser Technology》2007,39(6):1218-1225
In this paper a novel design which combines an eye-tracking device with a head gesture control module is discussed. In the eye-tracking mode, the user wears goggles, and two tiny CCD cameras capture the eye image from the screen with the help of a video capture card. In the head gesture control mode, a light source projector is turned on, and the CCD camera detects the position of the light source. The locations of the spots on the screen and on the image pupil of the eye image are calculated, compared with the previous point and are subsequently mapped to the point on the screen. The movement increment-coordinate control is also discussed, which could improve the ease of use of the computer. 相似文献
16.
In this paper, a new data processing and calibration method for a pronunciation system of an eye-tracking device is described. The eye-tracking device was created using both head mounted display (HMD) technology and remote operation capabilities. A pattern recognition computer program was used to distinguish the pupil position and calculate its coordinates.This system can be adapted to provide a digital speech function. A new method for processing the image of the eye in the PC-based system was also developed. With one video CCD camera and frame grabber analyzing a series of human pupil images while the subject is gazing at the screen, an auto-calibration algorithm is used to obtain the direction of the eye gaze in real time. The computers provide the speech sound according to the location where the eye gazes exceed 0.5 s. The availability of multipurpose in this eye-tracking system with very simple equipment will be reconfirmed for future advanced research. 相似文献
17.
18.
首次将多通道并行处理的概念引入联想存储系统中,提出一个带有CCD摄像机、图像卡、微机及液晶光阈等控制与输入设备,并以液晶电光开关作为取阈反馈装置的双通道联想系统。系统存储方式采用计算机磁盘充当外部图像库存储大量参考图像,而在系统内一点只存储一幅图像。 相似文献
19.