电子枪是彩色显像管中一个及其重要的部件，它的合格与否直接影响到电视画面的显示质量；而影响电子枪质量的因素主要有电子枪的扭曲特性和弯曲持性两种，因而必须对这两种特性进行检测，针对电子枪与其基座连接处结构特点，提出了一种新颖的技术解决方案，综合应用图象放大和自适应二值化、图象滤波、Laplacian边缘检测和Hough变换等图象处理技术，对电子枪扭弯曲特性进行检测研究，检测出弯曲的平均绝对误差为0.01mm，扭曲的平均绝对误差为0.72′。实验结果表明，该检测方法精度高、速度快、检测结果准确可靠，检测系统性价比高。

The electron gun of the picture tube is very importance in TV, the characteristic of the bend and distortion affect the quality of picture tube, so we have to measure the electron gun's bend and distortion error. According to the electron gun's structure characteristic, a new project about the measurement of the electron gun's bend and distortion error is designed. This paper introduces the image processing technique that contain Auto-adapted two-value method,image filter, laplacian edge detection, reformative hough transformation and their application in the measurement of electron gun's bend and distortion error. The experimental results show that these methods can effectively increase the measuring precision and the measuring speed of the electron gun's bend and distortion characteristic.