CAJ | 학술논문

图像去噪是图像处理邻域的重要课题，该文在3维直方图的基础上定义图像的3维轴距，分析无噪声及椒盐噪声影响下图像3维轴距的分布特点，提出基于3维轴距的去噪算法。算法首先对图像进行边沿扩展，再利用3维轴距来检测噪声，最后用非噪声中值滤波来消除噪声。仿真比较了3维轴距去噪算法与中值滤波、自适应开关中值、快速自适应均值滤波、修正方向加权中值滤波和自适应模糊开关中值滤波算法的去噪性能，结果证明该文算法的有效性。
도상거조시도상처리린역적중요과제，해문재3유직방도적기출상정의도상적3유축거，분석무조성급초염조성영향하도상3유축거적분포특점，제출기우3유축거적거조산법。산법수선대도상진행변연확전，재이용3유축거래검측조성，최후용비조성중치려파래소제조성。방진비교료3유축거거조산법여중치려파、자괄응개관중치、쾌속자괄응균치려파、수정방향가권중치려파화자괄응모호개관중치려파산법적거조성능，결과증명해문산법적유효성。
Image denoising is an important issue in the field of image processing. This paper defines the three-dimensional axis distance on the basis of three-dimensional histogram, analyzes the distribution features of image’s three-dimensional axis distance under the influence of non-noise and salt-pepper noise situation, thus the denoising algorithm upon the three-dimensional axis distance is proposed. The proposed algorithm extends image edge at first and then detects noise by employing the three-dimensional axis distance. Finally, the noise is eliminated by excluding noise pixels’ median filter. The results of comparisonsamong the proposed algorithm, median filter, adaptive switching median filter, efficient average filter, modified directional-weighted-median filter, and noise adaptive fuzzy switching median filter verify the effectiveness of the proposed algorithm.