Matching adaptive filtering method capable of being used for multiplexing off-axis digital holography

• Main Authors: YU XUELIAN, ZHANG YUEHUI, LI JIA, BAO XINGXU, ZHAO LIHANG, XIE ZHENFEI
• Format: Patent
• Language: Chinese; English
• Published: 03.10.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; PHYSICS; RESONATORS

The invention discloses a matching adaptive filtering method capable of being used for multiplexing off-axis digital holography. The method comprises the following steps: firstly, performing Fourier transform on a multiplexing hologram to obtain a multiplexing holographic spectrum, and setting an initial value of a filtering algorithm according to the number of spectrum items in the multiplexing holographic spectrum; normalizing the multiplexing holographic spectrum and carrying out K-means threshold clustering to obtain a clustering center set; carrying out standardization and phase taking on the multiplexing holographic spectrum to obtain a standardized phase spectrum, and carrying out regional lightening on the standardized phase spectrum; matching and positioning the standardized phase spectrum and the clustering center set to obtain a plurality of filtering centers, and generating a Butterworth filtering window by taking one third of the distance from each filtering center to the zero point of the freque