CAJ | 학술논문

提出了基于反射阴影图的间接光照绘制改进算法。利用间接光照变化平滑的特点对低空间分辨率间接光照的计算结果进行插值得到高分辨率间接光照的结果。由于边界区域间接光照的变化是高频的，必须对边界和非边界区域分别计算。利用可视场景点的几何属性图，检测场景中几何对象的边界，将可视场景区域分为边界区域和非边界区域。边界区域的间接光照在高分辨率下直接计算，其它区域则由低分辨率的间接光照结果插值得来，最后使用自适应区域滤波方法对高分辨率间接光照的结果进行滤波得到最终间接光照结果。实验结果表明，相比于原始的基于反射阴影图的间接光照绘制算法，本算法显著提高了绘制效率，并通过设置插值分辨率阈值来增强算法的适应性。
제출료기우반사음영도적간접광조회제개진산법。이용간접광조변화평활적특점대저공간분변솔간접광조적계산결과진행삽치득도고분변솔간접광조적결과。유우변계구역간접광조적변화시고빈적，필수대변계화비변계구역분별계산。이용가시장경점적궤하속성도，검측장경중궤하대상적변계，장가시장경구역분위변계구역화비변계구역。변계구역적간접광조재고분변솔하직접계산，기타구역칙유저분변솔적간접광조결과삽치득래，최후사용자괄응구역려파방법대고분변솔간접광조적결과진행려파득도최종간접광조결과。실험결과표명，상비우원시적기우반사음영도적간접광조회제산법，본산법현저제고료회제효솔，병통과설치삽치분변솔역치래증강산법적괄응성。
In this paper,an advanced algorithm based on reflective shadow maps (RSM) for rendering indirect illumina-tion is proposed. Due to the fact that indirect illumination changes smoothly,high-resolution indirect illumination can be calculated by interpolating the low-resolution results. However, the indirect illumination in regions of boundary changes sharply;thus the visible regions of scenes should be divided into areas of boundary and non-boundary via detection for the boundary of 3D objects with help of geometric attribute maps. The indirect illumination in the areas of boundary is computed directly, while others can be interpolated by low-resolution results. Finally, adaptive region filtering is used to smoothen the high-resolution indirect illumination results obtained by interpolation operations mentioned above. Exper-imental result shows that our algorithm is faster than the original RSM-based one. Its adaptability can be controlled by the interpolation resolution threshold.