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Illustration of a portable camera obscura device from Johann Sturm, Collegium Experimentale (1676) German philosopher Johann Sturm published an illustrated article about the construction of a portable camera obscura box with a 45° mirror and an oiled paper screen in the first volume of the proceedings of the Collegium Curiosum , Collegium ...
A cutaway drawing, also called a cutaway diagram, is a 3D graphics, drawing, diagram and or illustration, in which surface elements of a three-dimensional model are selectively removed, to make internal features visible, but without sacrificing the outer context entirely.
In mathematics, physics, and art, moiré patterns (UK: / ˈ m w ɑː r eɪ / MWAH-ray, US: / m w ɑː ˈ r eɪ / mwah-RAY, [1] French: ⓘ) or moiré fringes [2] are large-scale interference patterns that can be produced when a partially opaque ruled pattern with transparent gaps is overlaid on another similar pattern. For the moiré ...
While Romanesque book illustration was inspired by mural painting, Gothic book illustration was primarily inspired by stained glass, which marked the Gothic cathedrals. 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.
A value of 1 means that the pixel is fully opaque. With the existence of an alpha channel, it is possible to express compositing image operations using a compositing algebra. For example, given two images A and B, the most common compositing operation is to combine the images so that A appears in the foreground and B appears in the background.
The result is a system in which prices are opaque, meaning that real price signals—information about supply, demand, scalability, flexibility, and so forth—are almost entirely absent.
The opaque projector, or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. The episcope must be distinguished from the diascope , which is a projector used for projecting images of transparent objects (such as films or slides), and from the epidiascope , which is capable of projecting ...
Opaque, "Balop" slides were cards on 4 in × 3 in (102 mm × 76 mm) stock or larger (always maintaining the 4:3 aspect ratio) that were photographed by the use of a Balopticon. Opaque cards were popular as shooting a card on a stand often caused keystoning problems. A fixed size and axis would ensure no geometric distortion.