Noise reduction in volume holographic memories

摘要

A method for improving the quality of holographic images by reducing local noise in a holographic memory system is disclosed. The method is characterized by: storing a white reference image and a black reference image in the memory system, storing a series of data images in the memory system, applying a simple model based on a point-to-point of linear interpolation to the series of data images, the white reference image and the black reference image to provide a series of corrected data images having reduced noise. The simple model is preferably in the form of $\mathop{\mathrm{image}}$ s\⁡\left(x,y\right)=\frac{I\⁡\left(x,y\right)-I_{\min }\⁡\left(x,y\right)}{I_{\max }\⁡\left(x,y\right)-I_{\min }\⁡\left(x,y\right)}\⁢\text{\ }\⁢\left(s_{\max }\⁡\left(x,y\right)-s_{\min }\⁡\left(x,y\right)\right),$$;which is characterized by temporal stability for the series of data images for each set of the black and white reference images.