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Related Concept Videos

Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Area Computation by the Alternative Coordinate Method01:24

Area Computation by the Alternative Coordinate Method

The alternative coordinate method, also known as the Shoelace Formula, is a technique for determining the area of a traverse using Cartesian coordinates. This method relies on the sequential arrangement of x and y coordinates for each point of the shape, ensuring accuracy and ease of application.In this approach, each corner's x and y coordinates are listed as fractions, with the x-coordinate as the numerator and the y-coordinate as the denominator. These coordinates are arranged sequentially...
Color Vision01:24

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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
Visual System01:26

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
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Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...

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Optical implementation of visible gray-image morphology with the visual-area-coding technique.

T Konishi, S Taniguchi, J Tanida

    Applied Optics
    |November 19, 2010
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new method for visible gray-image morphology using visual-area-coding technique (VACT). This approach adapts mathematical morphology for efficient image processing and demonstrates its validity through simulations and optical experiments.

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    Area of Science:

    • Digital image processing
    • Optical computing
    • Mathematical morphology

    Background:

    • Mathematical morphology is a powerful image analysis tool.
    • Existing methods for gray-image morphology can be computationally intensive.
    • Digital analog-optical computing offers potential for high-speed processing.

    Purpose of the Study:

    • To introduce a novel scheme for visible gray-image morphology.
    • To adapt mathematical morphology operations for implementation using the visual-area-coding technique (VACT).
    • To validate the proposed technique through simulations and optical experiments.

    Main Methods:

    • The visual-area-coding technique (VACT) was employed, converting image data into visible coded patterns.
    • VACT operations were designed to be analogous to mathematical morphology operations.
    • Computer simulations and optical experiments were conducted to verify the technique's correctness.

    Main Results:

    • The VACT successfully implements gray-image morphology operations.
    • Computer simulations confirmed the theoretical framework.
    • Optical experiments validated the practical application of the VACT for image morphology.

    Conclusions:

    • The proposed VACT scheme provides a viable method for visible gray-image morphology.
    • This technique offers a new approach to optical computing for image processing.
    • The processing capacity is quantifiable using the space-bandwidth product.