1. 南京航空航天大学电子信息工程学院,南京,210016
2. 华中科技大学数字制造装备与技术国家重点实验室,武汉,430074
3. 国土资源部地质信息技术重点实验室,北京,100037
4. 东华理工大学江西省数字国土重点实验室,南昌,330013
网络首发:2015-06-10,
纸质出版:2015
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吴一全 1, 2, 3, 等. 人工蜂群优化的非下采样Shearlet域引导滤波图像增强[J]. 西安交通大学学报, 2015,49(6):39-45.
An Image Enhancement Algorithm with Guided Filtering in Non-Subsampled Shearlet Transform Domains Based on Artificial Bee Colony Optimization[J]. 2015, 49(6): 39-45.
吴一全 1, 2, 3, 等. 人工蜂群优化的非下采样Shearlet域引导滤波图像增强[J]. 西安交通大学学报, 2015,49(6):39-45. DOI: 10.7652/xjtuxb201506007.
An Image Enhancement Algorithm with Guided Filtering in Non-Subsampled Shearlet Transform Domains Based on Artificial Bee Colony Optimization[J]. 2015, 49(6): 39-45. DOI: 10.7652/xjtuxb201506007.
针对现有图像增强算法边缘保持性能不佳、抗噪性弱的问题
提出了一种改进的引导滤波图像增强算法——ABCO-NSST-GF。通过非下采样Shearlet变换(NSST)将图像分解成低频和高频2部分
利用引导滤波来增强低频系数
避免了高频噪声的放大; 对图像的高频系数进行非线性增益函数变换
在增强边缘及细节的同时抑制噪声。最后
对处理后的低频和高频系数实施NSST反变换
重构出最终的增强图像。由于引导滤波中的盒滤波半径与正则化参数对增强结果有较大影响
采用了混沌蜂群算法搜索其最佳值
确保增强结果达到最优。针对约70幅实际工程图像进行了实验
结果表明
ABCO-NSST-GF算法能够明显改善图像视觉效果
与NSCT自适应阈值法等4种算法相比
所得图像清晰度、对比度和信息熵平均提高25.2%
与空域引导滤波算法相比
P峰值信噪比平均提高20.9%。
An improved image enhancement algorithm with guided filtering— ABCO-NSST-GF is proposed to solve the shortcomings of existing image enhancement algorithms in edge preservation and anti-noise performance. The NSST decomposes an input image into a low-frequency component and several high-frequency components
and then the guided filtering is utilized to enhance the low-frequency coefficients to avoid amplifying noises in the process of image enhancement. The high-frequency coefficients are transformed by a nonlinear gain function so that the edges and details are enhanced while the noise is suppressed. Finally
the resultant image is reconstructed by applying the inverse NSST to the processed low-frequency coefficients and high-frequency coefficients. Since the box filter radius and regularization parameter of guided filtering have significant influences on enhancement effects
the chaotic bee colony optimization algorithm is adopted to find their optimal values for best enhancement effects. Experiments on about 70 practical engineering images show that the ABCO-NSST-GF algorithm significantly improves visual effects. Comparisons with 4 existing algorithms such as adaptive threshold algorithm based on NSCT show that the quantitative evaluation indicators of the ABCO-NSST-GF algorithm such as definition
contrast and entropy get about 25.2% average improvement
while a comparison with the spatial guided filtering enhancement algorithm shows that the proposed algorithm has a 20.9% improvement in PSNR.
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KARABOGA D, BASTURK B. A powerful and efficient algorithm for numerical function optimization: artificial bee colony(ABC)algorithm [J]. Journal of Global Optimization, 2007, 39(3): 459-471.
KARABOGA D, BASTURK B. On the performance of artificial bee colony(ABC)algorithm [J]. Applied Soft Computing, 2008, 8(1): 687-697.
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PENG Zhou, ZHAO Baojun. Novel scheme for infrared image enhancement based on Contourlet transform and fuzzy theory [J]. Laser Infrared, 2011, 41(6): 635-640.
占必超, 吴一全, 纪守新. 基于平稳小波变换和Retinex的红外图像增强方法 [J]. 光学学报, 2010, 30(10): 2788-2793.
ZHAN Bichao, WU Yiquan, JI Shouxin. Infrared image enhancement method based on stationary wavelet transformation and Retinex [J]. Acta Optica Sinica, 2010, 30(10): 2788-2793.
唐晓庆,范赐恩,刘鑫.基于边缘保持滤波的单幅图像快速去雾.2015,49(3):143-150.[doi:10.7652/xjtuxb201503022]
侯兴松,张兰.方向提升小波变换域稀疏滤波的自然图像贝叶斯压缩感知.2014,48(10):15-21.[doi:10.7652/xjtuxb 201410003]
靳峰,冯大政.利用空间序列描述子的快速准确的图像配准算法.2014,48(6):19-24.[doi:10.7652/xjtuxb201406004]
符均,牟轩沁,季文博.亮色分离的饱和图像校正方法.2014,48(10):101-107.[doi:10.7652/xjtuxb201410016]
袁飞,朱利,张磊.利用超图图割的图像共分割算法.2014,48(2):20-24.[doi:10.7652/xjtuxb201402004]
穆为磊,高建民,陈富民,等.符合人眼视觉特性的焊缝射线数字图像增强方法.2012,46(3):90-93.[doi:10.7652/xjtuxb201203016]
张敏,牟轩沁.一种多尺度X射线胸片图像增强算法.2010,44(6):83-87.[doi:10.7652/xjtuxb201006016]
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