Inputting two-dimensional graphics into computer becomes easy and convenient because of the rapid development of digital camera imaging technology. However, distortion is often introduced into the process of taking pictures owing to many factors such as the object surroundings, shooting conditions and so on. A bilinear model is established for correction and restoring the photos until the coordinate value error of the original drawing and the model is less than lmm. The experiment results show that the modified model is better at restores photos with high computational efficiency.%数码相机成像技术的发展为二维图形输入到计算机中提供了便捷,但其成像过程中受拍摄环境及拍摄条件等因素的影响,拍摄得到的图像与原图形相比会出现各种各样的失真变形,无法反映原图的真实情况.通过建立双线性模型的方法,对拍摄得到的二维图形照片进行矫正还原,并对矫正前后的图像进行对比以修正模型,直到修正后图像像素点的坐标误差在1 mm以内.试验结果表明,修正后的模型具有较好的矫正效果,且计算效率高.
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