改进的图像网格三角剖分插值
首发时间:2012-07-12
摘要:图像网格三角剖分插值能有效改善插值后图像的边缘保存及视觉效果。为了解决剖分算法可能出现的误判行为,提出一种基于重叠判定的三角剖分方法,通过增大剖分判定的参考区域,提高判定算法的正确率。同时利用三角形重心坐标性质,并结合图像网格三角剖分后投影为等腰直角三角形的特征,改进剖分后三角形内部插值方法,有效降低算法时间复杂度,提高算法插值效率。实验结果表明,改进后的算法较好地保持了图像边缘,并改善图像平滑度,具有一定的实用价值。
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Improved Image Interpolation Based on Image Mesh Triangulation
Abstract:The image interpolation based on image mesh triangulation can effectively improve the edges saved and visual effect of the interpolated image. For resizing the mistake determination of the subdivision that the algorithm done, propose an improved Triangulation based on the overlap determination of the edges. Improve the accuracy of judging algorithm by expanding the refer area of the determination. And improve the triangle internal interpolation by employing the triangle barycenter coordinates properties and the feature that the projection is a set of isosceles right triangles,it reduce the original algorithm time complexity efficiently, and improve the efficiency of the image interpolation. The experimental results show that the improved algorithm is better to maintain the image edge of the image, and improves the image smoothness, has some practical value.
Keywords: image mesh triangulation interpolation overlap determination triangle barycenter coordinates
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