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| 基于小波变换的数字胸片自适应增强 | |
| 引用本文： | 张道兵,张继武,许朝晖,史舒娟.基于小波变换的数字胸片自适应增强[J].光子学报,2005,34(2):302-305. |
| 作者姓名： | 张道兵 张继武 许朝晖 史舒娟 |
| 作者单位： | 中国科学院西安光学精密机械研究所,西安,710068;中国科学院西安光学精密机械研究所,西安,710068;东北大学信息科学与工程学院,沈阳,110006;西安交通大学图像所,西安,710049 |
| 摘 要： | 利用图像自适应增强原理, 推导出小波域中的等价表示. 根据视觉生理心理学原理, 具体的增益系数由图像的背景灰度确定. 同时考虑到胸片中重要的细节信息位于中间频率的特性, 增益系数需要进行调整. 实验结果表明, 调整增益后的小波自适应增强方法能有效的增强数字胸片中的细节信息. |
| 关 键 词： | 自适应增强 小波变换 数字胸片 |
| 收稿时间： | 2004-01-14 |
| 修稿时间： | 2004年1月14日 |
Digital Radiography Image Adaptive Enhancement Based on Wavelet Transform |
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| .Digital Radiography Image Adaptive Enhancement Based on Wavelet Transform[J].Acta Photonica Sinica,2005,34(2):302-305. |
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| Authors: | |
| Institution: | (1 Xi′an Institute of Optics and Precision Mechanics of CAS, Xi′an 710068) (2 School of Information Science and Engineering,Northeastern University, Shenyang 110006) (3 Institute of Image Proessing, Xi′an Jiaotong University, Xi′an 710049) |
| Abstract: | The equivalence equation in wavelet domain is deduced from the basic theory of adaptive image contrast enhancement in time domain.Based on the principle of visually receptive psychology, the gain should be determined by the background of the image.At the same time, the gain should be adjusted when taking the trait of the digital radiography with important details lie in medium spatial frequency into account.The experiment results show that wavelet adaptive enhancement with adjusted gain is effective for the enhancement of the detail information in digital radiography. |
| Keywords: | Adaptive enhancement Wavelet transform Digital radiography |
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