针对刑侦领域柱体表面遗留物证无损获取的要求, 提出一种基于图像拼接的柱体表面物证图像超高分辨率采集方法。采用高分辨率单反相机获取匀速旋转的柱体图像序列, 将图像视觉显著性原理应用到序列图像, 检测出柱体; 在Shi-Tomasi算法检测出角点特征的基础上, 提出位置受限的双向角点匹配微元提取算法; 拼接得到一幅柱体360°视角的高分辨率全景图像。实验结果表明, 此方法能够获取满足拼接要求的序列图像, 拼接结果与实际图像比较, 不失真, 误差小, 满足刑侦领域物证比对的要求。

Aimed at the requirement of lossless acquisition in material evidence which on cylinder surface in the field of criminal investigation, an image ultra-high resolution acquisition method in material evidence on cylinder surface which is based on image stitching is proposed. High resolution single lens reflex camera is used for acquiring image sequences of cylinder which is rotate at a constant speed. Cylinder is detected form image sequences through applying on the principle of image visual saliency. On the bases of corner feature which is detected by Shi-Tomasi algorism, infinitesimal element is extracted by two-way corner point matching algorithm of position limitation, a high resolution panoramic image of 360-degree angle of view of cylinder is obtained by image stitching. The experiment results show that the method can acquire image sequences which meet the mosaic requirement. Compared with the real image, the result of image mosaic has less distortion and minor error. The method can meet the requirement of material evidence comparison in the field of criminal investigation.