Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Jun 16, 2026

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
10:28

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

Published on: July 5, 2016

Reflection holographic filters for compacting optical processors.

G C Righini, V Russo, S Sottini

    Applied Optics
    |February 4, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    'Transient immediate orthostatic hypotension' is preferable to 'initial' orthostatic hypotension.

    Autonomic neuroscience : basic & clinical·2025
    Same author

    Predictive value of Cardiac Magnetic Resonance: new and old parameters in the natural history of repaired Tetralogy of Fallot.

    BMC cardiovascular disorders·2024
    Same author

    Spectral differences in resting-state EEG associated to individual Emotional Styles.

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2022
    Same author

    Electron-phonon coupling and vibrational properties of size-selected linear carbon chains by resonance Raman scattering.

    Nature communications·2022
    Same author

    It's a Question of Methods: Computational Factors Influencing the Frontal Asymmetry in Measuring the Emotional Valence.

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2021
    Same author

    Yellow (Lens) Better: Bioelectrical and Biometrical Measures to Assess Arousing and Focusing Effects.

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2021
    Same journal

    Multifunctional reconfigurable terahertz metasurface based on vanadium dioxide phase transition: achieving broadband absorption and efficient polarization conversion.

    Applied optics·2026
    Same journal

    High-Q-factor electromagnetically induced transparency utilizing quasi-bound states in the continuum in an all-dielectric terahertz metasurface.

    Applied optics·2026
    Same journal

    Automated stitching interferometry for high-precision metrology of X-ray mirrors.

    Applied optics·2026
    Same journal

    Experimental demonstration of an approach to designing a metal-dielectric DBR resonant cavity structure.

    Applied optics·2026
    Same journal

    High-precision wavefront reconstruction from a single-shot interferogram using a physics-driven hybrid feature calibration network.

    Applied optics·2026
    Same journal

    Ultra-high-Q Fano resonance based on coupled topological corner states in Kagome photonic crystals.

    Applied optics·2026
    See all related articles

    Reflection hologram filters offer effective character recognition with high accuracy and tolerance for similar characters. These filters enable smaller, more cost-effective optical processors for improved performance.

    Area of Science:

    • Optics and Photonics
    • Image Processing
    • Holography

    Background:

    • Optical character recognition (OCR) systems often rely on matched filters for pattern matching.
    • Holographic filters, particularly those using transmission holograms, have been explored for their potential in OCR.
    • Developing filters that offer high discrimination and positional tolerance is crucial for robust character recognition.

    Purpose of the Study:

    • To investigate the efficacy of reflection hologram filters for character recognition tasks.
    • To compare the performance of reflection filters with existing transmission hologram filters.
    • To assess the advantages of using reflection filters in terms of processor size and cost.

    Main Methods:

    • Character recognition experiments were conducted using reflection matched filters.

    More Related Videos

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
    09:36

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

    Lensless Fluorescent Microscopy on a Chip
    11:23

    Lensless Fluorescent Microscopy on a Chip

    Published on: August 17, 2011

    Related Experiment Videos

    Last Updated: Jun 16, 2026

    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
    10:28

    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

    Published on: July 5, 2016

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
    09:36

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

    Lensless Fluorescent Microscopy on a Chip
    11:23

    Lensless Fluorescent Microscopy on a Chip

    Published on: August 17, 2011

  • Reflection filters were fabricated using volume holograms recorded on photographic emulsion.
  • The filters were processed and integrated into a one-lens optical processor.

    • Main Results:

    • Reflection filters demonstrated good discrimination capabilities among similar characters.
    • These filters exhibited significant tolerance to variations in character positioning.
    • Performance was found to be comparable to that of transmission hologram filters.
    • The use of reflection filters allowed for a one-lens processor, halving the size and cost.

    Conclusions:

    • Reflection hologram filters are a viable and effective alternative for character recognition.
    • They offer comparable or superior performance to transmission filters with added benefits.
    • The one-lens processor design significantly reduces system complexity, size, and cost.