Abstract
A computer-implemented method of transmitting through a disordered medium from a transmitter to a receiver an image represented as input coherent electromagnetic radiation, the disordered medium having a transmission matrix comprising a plurality of complex-valued transmission constants that relate said input coherent electromagnetic radiation to output electromagnetic radiation at said receiver, which method comprises the steps of:
performing a characterising process on said disordered medium to determine said transmission matrix;
using said transmitter to transmit said image through said disordered medium;
performing a reconstruction process using said transmission matrix to generate a reconstructed image from the output electromagnetic radiation at said receiver;
wherein in said characterisation process the step of determining said transmission matrix comprises:
determining said complex-valued transmission constants as real-valued transmission constants by using an approximately linear relationship between said input electromagnetic radiation and said output electromagnetic radiation; and
using said real-valued transmission constants to generate and store a version of the transmission matrix;
and said reconstruction process comprises the steps of:
generating an output signal comprising intensity or amplitude values of said output electromagnetic radiation;
generating said reconstructed image by combining said output signal and said version of the transmission matrix in a way that effects a matrix multiplication of an inverse of said transmission matrix and said output signal; and
outputting said reconstructed image from said receiver.
performing a characterising process on said disordered medium to determine said transmission matrix;
using said transmitter to transmit said image through said disordered medium;
performing a reconstruction process using said transmission matrix to generate a reconstructed image from the output electromagnetic radiation at said receiver;
wherein in said characterisation process the step of determining said transmission matrix comprises:
determining said complex-valued transmission constants as real-valued transmission constants by using an approximately linear relationship between said input electromagnetic radiation and said output electromagnetic radiation; and
using said real-valued transmission constants to generate and store a version of the transmission matrix;
and said reconstruction process comprises the steps of:
generating an output signal comprising intensity or amplitude values of said output electromagnetic radiation;
generating said reconstructed image by combining said output signal and said version of the transmission matrix in a way that effects a matrix multiplication of an inverse of said transmission matrix and said output signal; and
outputting said reconstructed image from said receiver.
| Original language | English |
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| Patent number | US12191911B2 |
| IPC | PCT/GB2021/050099 |
| Priority date | 17/01/2020 |
| Filing date | 15/01/2021 |
| Publication status | Published - 7 Jan 2025 |