Image-gradient-guided-wavefront-shaping

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Image-gradient-guided-wavefront-shaping

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A numerical simulation code for image gradient guided wavefront shaping

Image-gradient-guided-wavefront-shaping 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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# Image Gradient Guided Wavefront Shaping

## Basic information

Code for image gradient guided wavefront shaping proposed in the paper "Overcoming the diffraction limit by exploiting unmeasured scattering media" by Shuai Sun, Zhen-Wu Nie, Long-Kun Du, Chen Chang, and Wei-Tao Liu.

Paper Links: https://doi.org/10.1364/OPTICA.507310

Citation Format: Shuai Sun, Zhen-Wu Nie, Long-Kun Du, Chen Chang, and Wei-Tao Liu, "Overcoming the diffraction limit by exploiting unmeasured scattering media," Optica 11, 385-391 (2024)

## File description

Image-gradient-guided-wavefront-shaping  
---- Source: Different targets tested in the optimization.  
---- Function: Including basic functions used in the optimization.  
---- opt.m: The main file of the simulation.  
---- initial_pra.m: The file initializing parameters for optimization.  
---- show_pic.m: Draw Intensity distribution on the camera.  
---- Image_metric.m: Cost function for GA including different image metrics(e.g. image gradient, modified entropy, image variance)

## How to Start

Directly run 'opt.m'

## Principle

Figure 1: Principle Of image gradient guided wavefront shaping

![Figure1](https://github.com/Peakmit/Image-gradient-guided-wavefront-shaping/assets/46422710/079af191-4da0-4841-a161-77b75dfbcdda)

Scattering media(e.g. diffuser, fog, biological tissue) on the light path will causing the degradation of images. With the help of wavefront shaping, abberation brought by scatter media can be cancelled by iteratively optimizing the compensation phase on the SLM(Spatial Light Modulator). The difference between scattered image and diffraction limited image on image gradient can replace invasive guide-star to guide the optimization, reconstructing high contract images.

Figure 2: Flow chart of image gradient guided wavefront shaping

![Figure2](https://github.com/Peakmit/Image-gradient-guided-wavefront-shaping/assets/46422710/abc481e6-64e9-4e59-beaa-2d187d90262e)

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Image-gradient-guided-wavefront-shaping 최신버젼 다운로드

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