According to the geometric distortion of digital still camera, a detection method for geometric distortion based on digital image process is put forward. The cause of distortion for digital still camera and the principle of detection are expatiated. The target pictures captured by digital still camera are sent to computer and processed digitally by MatLab. The actual image's figure is captured by pixel spacing, the ideal image's figure is captured by geometric optics, and therefore the relative distortion is calculated. The experimental results show that this method can be useful for the digital examine and correction of digital still camera's parameters for its simple process, easy realization and digital detection.%针对数码相机普遍存在的几何畸变现象,提出了一种基于数字图像处理的畸变检测方法.在阐述数码相机畸变产生原因和检测原理的基础上,将待测数码相机拍摄目标靶板后的图片输入计算机,利用MatLab工具对图片进行数字图像处理,由像素间距获取实际像大小,由几何光学演算获得理想像大小,从而计算出相对畸变量.实验表明,该方法过程简单,易于实现,数字化检测程度高,为数码相机性能参数的数字化检测校正提供了实验依据.
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