CAJ | 학술논문

针对非刚性体具有易变形和色彩多样的特点, 而传统的光度立体法不能用于动态多色物体的三维数字化的问题, 提出一种利用实例球驱动和颜色替换的彩色光度立体法. 对于动态纯色非刚性体, 利用采样球实例驱动的彩色光度立体法建立亮度与法向量的对应关系, 并通过几何约束实现对其三维数字化; 对于双色花纹物体, 通过区域分割对不同区域采用对应关系实现三维数字化; 对于多色花纹物体, 通过不同颜色花纹在白光下的反射系数比将彩色区域替换成与纯色采样球颜色一致时的对应亮度, 以实现对其三维数字化. 仿真和实验结果表明, 该方法简单、采样快速, 可以实现对非刚性体的三维数字化.
침대비강성체구유역변형화색채다양적특점, 이전통적광도입체법불능용우동태다색물체적삼유수자화적문제, 제출일충이용실례구구동화안색체환적채색광도입체법. 대우동태순색비강성체, 이용채양구실례구동적채색광도입체법건립량도여법향량적대응관계, 병통과궤하약속실현대기삼유수자화; 대우쌍색화문물체, 통과구역분할대불동구역채용대응관계실현삼유수자화; 대우다색화문물체, 통과불동안색화문재백광하적반사계수비장채색구역체환성여순색채양구안색일치시적대응량도, 이실현대기삼유수자화. 방진화실험결과표명, 해방법간단、채양쾌속, 가이실현대비강성체적삼유수자화.
Non-rigid objects are deformable and have various colors, which can't be digitized with traditional photometric stereo method. To solve this problem, this paper presents a color photometric stereo method with sampling examples and color transformation. For dynamic pure colored objects, the relationship between intensities and normal vectors is constructed by color photometric stereo method using reference sphere as the example, then the 3D point clouds on the object can be calculated with the geometry constraints. To digitize double colored objects, image segmentation is used and the relationship between intensities and normal vectors is constructed for different regions respectively. For multicolored objects, the ratio of albedo of different colored parts on the object under white light is used to transform the intensities of the object into that corresponding to pure colored reference sphere and thus the object can be digitized. It is verified by the simulation and experimental results that the method proposed is simple, rapid and can digitize non-rigid objects.