利用傅氏变换全息图的非线性记录实现图象微分

基金项目:

邮电部中青年科学基金

详细信息

Image edge enhancement with nonlinear effect of Fourier transformation holography

摘要: 提出一种图象边缘增强的新方法。仅简单地调整参考光和物光的光强比，记录一个非线性条件下的傅氏变换全息图，即可完成对图象的微分运算。从理论上分析了全息记录的非线性效应使得图象得到微分结果的原理。给出了实验结果。
- 图象微分 /
- 全息图的非线性效应 /
- 傅氏变换全息图
Abstract: This paper theoretically analyzes the Fourier transformation in a Fourier Fraunhofer holograph system and pint out that the normal first order diffraction efficiency η±1 and the beam intensity ratio k has the relationship: .When k =1,the diffraction effectiveness has the maximum.If k<1,the nonlinear hologram can be recorded.The analysis and experiments proved that the nonlinear effect can yield the edge enhancement.
- edge enhancement nonlinear effect /
- in holography /
- Fourier transformation holograms

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