铝合金AA6061-T4的丝状腐蚀图像分析

运用数字图像处理技术检测、提取了涂覆环氧树脂的AA6016铝合金丝状腐蚀图像，分析探讨了由丝状腐蚀图像所得到的腐蚀面积密度、腐蚀扩展速度以及垂直于切口方向投影值等参数对评估丝状腐蚀发展状况的有效性及合理性.     

Pro/E在底座压铸模设计制造中的应用

介绍了在底座压铸模设计中应用Pro/E进行模具型芯、型腔的自动生成，模具型芯加工的自动编程。可以缩短模具设计周期和加工周期，提高模具设计的准确性，降低模具成本。     

图象分析在定量测定钢中非金属夹杂物的应用

叙述了在材料检验工作中,如何建立测定钢中夹杂物的三种基本方法。“K法”级别的测定;含量的测定,尺寸分布的测定,并通过实例说明在钢材生产,研究中的意义。     

炭素制品X射线图像的缺陷特征分析与选择

针对炭素制品X射线检测图像的特点，对缺陷及其特征提取与选择技术进行了研究。分析了炭素制品生产中易产生的缺陷类型及缺陷的成像特征，在此基础上，从缺陷样本中提取了19个特征值。以特征组合分类能力数学模型为适应度函数，设计了基于遗传算法的特征选择策略，实现了对缺陷原始特征量的优化选择。利用BP神经网络分类器及选择的特征值对缺陷进行了模式分类。研究结果表明，提出的选择方法是比较有效的，可以用于缺陷的识别与分类。     

基于视觉传感的脉冲TIG焊熔池一次图像获取的研究

依据弧光光谱理论，采用辅助光源及复合滤光技术，有效地解决了焊接区熔池成像的干扰和清晰度差等问题，研究了滤光片与辅助光源对成像质量的影响和作用。试验结果表明，同普通图像采集方法相比，该系统获得图像的清晰度得到明显的提高，可以用于焊接过程的实时监控。     

基于数学形态学图像处理的TIG焊接过程正面熔宽控制

焊接过程熔池动态特征信息获取与智能控制一直是焊接界研究的前沿课题.针对TIG焊接过程没有飞溅,熔池形状稳定、清晰的特点,以TIG焊接过程为研究对象,采用机器视觉技术获取焊接动态过程正面熔池图像点,将数学形态学中的二值理论应用于熔池图像的处理,结合模糊逻辑和比例积分微分(PID)闭环控制理论,从弧焊过程熔透质量控制的角度出发,从软件开发到硬件组成,设计了一套焊接过程图像处理及正面熔宽控制系统.结果表明,该系统可以很好地克服焊接过程中的外界干扰,保证焊缝成形的稳定,从而实现了TIG焊质量控制的目标.     

Pro/E自动分模方法与技巧

Pro／E在模具制造业已经普遍应用，基于作者几年来对Pro／E软件应用的一些实践与体会，简单介绍Pro／E2001侧面影像曲线与裙边曲面的巧用。     

Difference in electron- and gamma-irradiation effects on output characteristic of color CMOS digital image sensors

Changes of the average brightness and non-uniformity of dark output images, and quality of pictures captured under natural lighting for the color CMOS digital image sensors irradiated at different electron doses have been studied in comparison to those from the γ-irradiated sensors. For the electron-irradiated sensors, the non-uniformity increases obviously and a small bright region on the dark image appears at the dose of 0.4 kGy. The average brightness increases at 0.4 kGy, increases sharply at 0.5 kGy. The picture is very blurry only at 0.6 kGy, showing the sensor undergoes severe performance degradation. Electron radiation damage is much more severe than γ radiation damage for the CMOS image sensors. A possible explanation is presented in this paper,     

Image segmentation of small defects in precision weldments with complex structure

In this paper, the X-ray nondestructive test method of small defects in precision weldments with complex structure was presented. To resolve the difficulty of defect segmentation in variable grey image, the image processing based on Visual Basic programming method was adopted. The methods of automatic contrast and partial grey stretch were used to enhance the X-ray detection image which has relatively low contrast, then automatic threshold method was carried out to segment the two high intensity zones, and weld zones which contain the small defects was extracted. Smoothing and sharpen processing were proceeded on the extracted weld zones, and small defects in X-ray detection image of weldments with complex structure were segmented by using the method of background subtraction in the end. The effects of raster were eliminated, and because of that the image processing was only proceeded on the extracted weld zones, the calculated speed using the above provided algorithm was improved.     

红外成像技术在GIS设备检漏中的应用

应用红外成像泄漏检测仪器,采用两种方法对三峡电厂、葛洲坝电厂、溪洛渡电厂、向家坝电厂的GIS设备分别进行了检测。结果表明:大面积无目的普查难以发现泄漏点,而对疑有泄漏的地方进行定位检测,当泄漏量达到一定程度时,可以直观地发现泄漏点。