数码照片中摄影物距推算与摄影现场重建

Calculation of Object Distance and Scene Reconstruction Based on Digital Photo

目的研究推算数码照片中的目标物与摄影机位的距离（即物距）。方法首先在电脑中查看数码照片拍摄所用的焦距值,其次在Adobe Photoshop软件中测得目标物成像在照片中的影像大小值,在拍摄现场实际测量目标物的大小值,最终依据摄影成像原理结合应用商用图像处理软件（ACDSee、Adobe Photoshop）完成对摄影物距的推算。结果实验测试表明,推算的物距与实际物距的误差一般在0.2%～1%以内。结论在满足一定拍摄条件下可借助数码影像资料还原当时摄影者的方位,对摄影现场重建具有实际的应用价值。

Objective To establish a method for calculating the object distance, i.e. the distance between the target and camera, in digital photos. Method Based on the imaging principles, the commercial image processing software of Acdsee and Adobe Photoshop were used to complete the calculation of object distance. Results The errors between the calculated object distances and the actual object distances were generally within 0.2%-1%. Conclusion Under certain shooting conditions, digital images can be used to restore the location of photographer, which is of practical value for scene reconstruction.