Cruz, Maria-Luisa
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Preferred name
Cruz, Maria-Luisa
Official Name
Cruz López, María Luisa
Alternative Name
mlcruz
Main Affiliation
ORCID
Scopus Author ID
57195069436
Researcher ID
S-8985-2017

Research Output

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Increasing reconstructed image quality using a random-repeated and displaced phase in time-average computer-generated holograms

2019 , Cruz, Maria-Luisa

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Publication

Speckle-noise reduction in computer generated hologram, using a modular random phase pattern

2020 , Cruz, Maria-Luisa

We present a modular random phase pattern, which uses small blocks of random phase avoiding symmetries in small zones. This phase reduces the speckle noise in computer generated holograms and it is independent of the object.

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Simple method for microscope lens calibration using grid lines.

2023 , Cruz, Maria-Luisa

We propose a simple method to calibrate a microscope lens using a grid lines pattern. We get four calibration patterns from each image, reducing the number of required images. In the final result, most of the spherical aberration is eliminated.

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Analysis of random-phase distributions and Perlin noise in CGH: a study of its effects on Fourier and Fresnel holograms reconstruction

2020 , Cruz, Maria-Luisa , Karen Guadalupe González-Velázquez

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Using digital Zernike phase-contrast for the focus-plane detection of pure phase objects analyzed with DHM

2018 , Cruz, Maria-Luisa

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Full image reconstruction with reduced speckle noise, from a partially illuminated Fresnel hologram, using a structured random phase

2019 , Cruz, Maria-Luisa

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Enhancement of grayscale image display with amplitude Fourier holograms, employing a limited bandwidth phase

2022 , Cruz, Maria-Luisa

An alternative method is proposed to generate a modified random phase that is able to concentrate the light around a given direction, produces well-contrasted Fourier amplitude holograms, reduces the quantity and the randomness of the speckle noise in the image, and decreases the amount of data necessary for the phase definition. This modified limited bandwidth random phase uses structured random phase patterns to control the object dispersion. The resulting hologram displays an image with structured speckle noise (SSN), exhibiting similar metrics as the iterative method for hologram generation. A filtering process eliminates the SSN; the speckle contrast in the final image is reduced from 0.66 to 0.07; and the peak SNR increases from 7.21 dB to 12.62 dB. This method enhances the fine details and grayscale tone perception in the final image.

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Publication

The Cumulative Capacitated Vehicle Routing Problem Including Priority Indexes

2020 , Karina Corona-Gutiérrez , Cruz, Maria-Luisa , Nucamendi-Guillén, Samuel , Olivares-Benitez, Elias

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Simple method for hologram multiplexing using vertical interlacing

2024-01-01 , Cruz, Maria-Luisa , Tomasz Kozacki

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Autonomous generation of extended images of dynamic phase objects in a depth volume sample using a simple focusing criterion and K-means clustering

2017 , Cruz, Maria-Luisa , Alcaraz Rivera, Miguel , Pinhas Girshovitz , Natan T. Shaked , Bahram Javidi , Bernard C. Kress , Wolfgang Osten , H. Paul Urbach

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