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An opaque substance transmits no light, and therefore reflects, scatters, or absorbs all of it. Other categories of visual appearance, related to the perception of regular or diffuse reflection and transmission of light, have been organized under the concept of cesia in an order system with three variables, including opacity, transparency and ...
Book illustration directly adopted the often dominant bright reds and blues in its miniatures, at least as far as representative opaque color paintings were concerned. The inspiration of stained glass affected the patterned ground of the miniatures in particular, while gilding contributed to the luminosity of the manuscripts.
Visual cryptography is a cryptographic technique which allows visual information (pictures, text, etc.) to be encrypted in such a way that the decrypted information appears as a visual image. One of the best-known techniques has been credited to Moni Naor and Adi Shamir , who developed it in 1994. [ 1 ]
The term is used in philosophical theories of reference, and is to be contrasted with referentially transparent context.In rough outline: Opacity: "Mary believes that Cicero is a great orator" gives rise to an opaque context; although Cicero was also called 'Tully', [2] we can't simply substitute 'Tully' for 'Cicero' in this context ("Mary believes that Tully is a great orator") and guarantee ...
In computer science, an opaque data type is a data type whose concrete data structure is not defined in an interface. This enforces information hiding, since its values can only be manipulated by calling subroutines that have access to the missing information. The concrete representation of the type is hidden from its users, and the visible ...
Materials that allow the transmission of light waves through them are called optically transparent. Chemically pure (undoped) window glass and clean river or spring water are prime examples of this. Materials that do not allow the transmission of any light wave frequencies are called opaque. Such substances may have a chemical composition which ...
Vivian Health examines five trends that could redefine nurses' roles, enhance patient care, and alter the entire healthcare system in 2025 and beyond.
The 1888 patent covered the film band to be of indefinite length and of any material, opaque or transparent (the reflection of a brightly lit opaque picture could also be projected). The band could be fully flexible or only between the pictures. The pictures could be hand-drawn, printed or "obtained by photography from nature".