CAJ | 학술논문

图像插值是数字图像处理领域中的一个基本问题，利用插值技术可以实现图像的缩放和图像恢复。传统的插值方法易使边缘产生锯齿效应或使插值结果模糊不清。该文提出一种基于角点保护的偏微分方程插值方法。该方法针对图像中不同的特征进行特定插值，在保持边缘结构清晰的同时，还能保护尖锐的角形结构，有效改善插值后图像的整体视觉效果和峰值信噪比。此外，对方程的主要参数进行分析，提出了相应的参数确定方法，从而提高该方法的适用性。
도상삽치시수자도상처리영역중적일개기본문제，이용삽치기술가이실현도상적축방화도상회복。전통적삽치방법역사변연산생거치효응혹사삽치결과모호불청。해문제출일충기우각점보호적편미분방정삽치방법。해방법침대도상중불동적특정진행특정삽치，재보지변연결구청석적동시，환능보호첨예적각형결구，유효개선삽치후도상적정체시각효과화봉치신조비。차외，대방정적주요삼수진행분석，제출료상응적삼수학정방법，종이제고해방법적괄용성。
Image interpolation is a basic issue in digital image processing, which can be used to realize image magnification and restoration,etc.. Traditional interpolation methods are easy to make the edge structures produce staircase artifacts or make the interpolated results blurred. An image interpolation method with corner preserving based on Partial Differential Equation (PDE) is proposed, which provides different interpolation applications for different characteristics of the image. The proposed interpolation scheme is not only able to maintain the edge structure clear, but also able to keep the corner sharp. Then, the overall visual and the Peak Signal to Noise Ratio (PSNR) of the interpolation image can be improved effectively. In addition, this paper puts forward methods for selecting the parameters through analyzing the equation, thus it improves the adaptability of the proposed method.