| 用计算全息制作二维Haar小波变换滤波器的研究 |
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| 引用本文： | 盛兆玄,王红霞,王君,周友杰,毛彩荣.用计算全息制作二维Haar小波变换滤波器的研究[J].激光与光电子学进展,2005,42(3):19-21. |
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| 作者姓名： | 盛兆玄 王红霞 王君 周友杰 毛彩荣 |
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| 作者单位： | 第二炮兵工程学院物理教研室,西安,710025;第二炮兵工程学院物理教研室,西安,710025;第二炮兵工程学院物理教研室,西安,710025;第二炮兵工程学院物理教研室,西安,710025;第二炮兵工程学院物理教研室,西安,710025 |
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| 摘 要： | 提出了用计算全息制作三类Haar子波滤波器的方法。将一维Haar子波函数组合，将得到三种类型的二维Haar子波函数，利用这三类二维Haar子波可以分别对图像进行角、水平边和垂直边的提取。采用罗曼Ⅲ型迂回位相编码法对三类Haar子波函数进行编码，绘出计算全息图。为了提高全息图的质量，采用显示器分屏抓图的办法，将全息图分割输出。在4f系统中实现对二维图像的三类Haar子波变换，给出了提取二值图像特征的模拟结果。
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| 关 键 词： | 计算全息 光学子波变换 Haar子波 迂回位相编码法 |
| 收稿时间： | 2004/9/27 |
Study of Two-Dimension Optical Haar Wavelet Transform Filter by Computer Generated Hologram |
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| SHENG Zhaoxuan,WANG Hongxia,WANG Jun,ZHOU Youjie,MAO Cairong.Study of Two-Dimension Optical Haar Wavelet Transform Filter by Computer Generated Hologram[J].Laser & Optoelectronics Progress,2005,42(3):19-21. |
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| Authors: | SHENG Zhaoxuan WANG Hongxia WANG Jun ZHOU Youjie MAO Cairong |
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| Abstract: | A new method of making optical Haar wavelet transform filters by computer generated hologram is pro－posed. In this method, three kinds of two-dimension wavelet functions are obtained by combining one-dimension Haar wavelet functions. The edge and angle characters of input image can be extracted by means of these Haar wavelet filers. The wavelet transform filter is fabricated on the computer by Lomann Ⅲ detour phase encoding method. The computer generated hologram (CGH) of filter is output individually to improve the quality of CGH by grasping pictures on the screen. Three kinds of optical Haar wavelet transforms can be realized by placing the filter in the frequency plane of a 4f system and the computer simulation results are given. |
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| Keywords: | computer generated hologram optical wavelet transform Haar wavelet detour phase encoding method |
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