CAJ | 학술논문

本文提出了一种既能保持图像特征又能加快扩散速度的自适应扩散模型。首先，该模型利用平均梯度矩阵的特征值区分出图像的平坦区域、线条边缘和角点；其次，该模型根据平均梯度矩阵及其特征向量来控制图像信息的扩散方向；这样，该模型可以在不同的区域自适应地选择不同的扩散方向和扩散速度，从而很好地保持了图像特征并自适应地加快了扩散速度。实验结果表明，该模型可以保持图像结构特征，抑制噪声，应用到数字图像修复中，既能加快图像修复速度，又能使修复后的图像具有更好的视觉效果。
본문제출료일충기능보지도상특정우능가쾌확산속도적자괄응확산모형。수선，해모형이용평균제도구진적특정치구분출도상적평탄구역、선조변연화각점；기차，해모형근거평균제도구진급기특정향량래공제도상신식적확산방향；저양，해모형가이재불동적구역자괄응지선택불동적확산방향화확산속도，종이흔호지보지료도상특정병자괄응지가쾌료확산속도。실험결과표명，해모형가이보지도상결구특정，억제조성，응용도수자도상수복중，기능가쾌도상수복속도，우능사수복후적도상구유경호적시각효과。
In order to not only maintain image features,but also to accelerate diffusion rate,an adaptive diffusion model is proposed in this paper.In this model,the flat areas,line edges and corners of damaged image can be distinguished ac-cording to eigenvalues of the average gradient matrix.Meanwhile,diffusion direction of image information is controlled by average gradient matrix and its eigenvectors.Thus,this model can adaptively select diffusion rate and its direction in differ-ent regions so as to maintain the structural characteristics of damaged image.The experimental results demonstrate that this model can speed up the diffusion rate while maintaining the image structure.When it is applied in image inpainting,this model can accelerate the inpainting while the inpainted image is in line with human visual effect.