内窥镜图像测量中为了保证测量精度,理论上要求成像系统的光轴与物平面保持垂直,而实际测量过程中光轴与物平面一般存在一定程度的垂直倾斜。针对垂直倾斜对内窥镜图像测量的影响,提出了一种基于内窥镜发射的线定标光的垂直倾斜校正方法。该方法从线定标光的位置信息中提取光轴倾斜信息,并对图像进行校正。实验结果表明,所提出的图像垂直倾斜校正方法能对内窥镜图像进行准确校正。

In order to ensure the accuracy of the endoscope image measurement, theoretically the image optical axis should maintain vertical with the object plane. In fact, certain amount of tilt exists between the optical axis and the object plane, which is called vertical tilt. To minimize the influence of the vertical tilt, an approach for image vertical tilt correction based on the fixed cursor is presented in this paper. This approach uses the tilt information of the optical axis from the fixed cursors position to correct the image. Experiment result shows that this approach for image vertical tilt correction reaches accurate result.