【作者】 赵更寅；

【导师】 任洪娥； 孙成启；

【作者基本信息】 东北林业大学 ， 控制理论与控制工程， 2003， 硕士

【摘要】 本论文是国家引进国际先进农业科学技术项目“数控激光及视频识别木材形状和缺陷技术”的基础研究之一。本论文的研究内容是利用X射线对木材的内部穿透能力，从而对原木内部缺陷进行测定。由于原木木质部分与内部缺陷部分对X射线的吸收能力不同，在X射线底片上形成的影像也不一样，如果对检测原木从不同的方向进行照射，再把得到的射线底片输入至计算机内部进行处理，就可以得到原木内部的大致空间结构参数，对原木的加工有重要的辅助作用。 本论文采用Visual C++6.0程序设计语言，以模块化软件设计技术，在Windows平台上，设计了一套利用X射线的原木内部缺陷的软件检测系统，通过选定的几个样本原木实际内部缺陷的测定，已达到一定的准确性，为原木内部缺陷识别的工业化推广提供了良好的理论和应用基础。该系统利用实验室现有的硬件条件，致力于解决原木X射线底片的图像处理和原木的计算机模拟再现的关键技术。本论文研究的利用X射线测定原木内部缺陷的理论，为工业化木材缺陷计算机视频检测设备的设计与应用，提供了必要的理论前提和技术基础。更多还原

【Abstract】 The paper is based on the project of "Detect of Log Internal Defect and Shape using Numerical Control Laser and Computer Frequency Distinguish System". The research content is detect of log internal defect (such as knobs ,internal decay ,hollow ,etc.) and shape by using X-ray to penetrate the log . The absorb of X-ray between log internal defect and log internal xylem is different .so the X-ray photograph is different .If we can get the several side X-ray photograph of log .and input the photograph into computer to digital image process . Then we can get the data and the location of log internal defect .At the same time .there are some important auxiliary effect for log machining .The system software is designed by Visual C++6.0 and model technology, based on Windows operating system. It provides the good theory and application foundation for industrial popularization of log internal defect’s automatic detection. The system applies itself to resolve the key problems in computer image processing and simulate reappear technology, taking full advantage of exiting equipment. After the experiment of sample log was carried out .the software is correct and accurate . To distinguish the log internal defect by X-ray scanner provide the essential theory premise and technology for the design and application of wood flaw detecting and discerning.更多还原