Rectification of Imaging Device Defections in Real Time Radiographic Inspection
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摘要: 对于由射线转换屏和CCD相机组成的X射线实时成像系统而言,成像器件缺陷是影响系统成像质量的重要因素.结合工程实践,分析了射线转换屏缺陷、CCD像元光响应不一致性等成像器件缺陷的特性及其成像规律,提出了一种数学模型和成像器件缺陷校正方法.实验结果表明,该方法对消除成像器件缺陷造成的图像降质有较好的效果.Abstract: Converter screen and CCD camera are the main imaging devices in real time radiographic inspection. Their defections are important factors affecting image quality. Based on experimental results, formation and characteristics of these defections were analyzed, a new mathematic model and a rectification method based on gray scale compensation were presented. It was indicated through experiments that this method is efficient in the rectification of the imaging device defections, with the least loss of useful information.
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Key words:
- radiography /
- image processing /
- gray scale /
- converter screen
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