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1 opacity
"The quality that defines how much light passes through an object's pixels. If an object is 100 percent opaque, no light passes through it." -
2 rendering
"The creation of an image containing geometric models, using color and shading to give the image a realistic look. Usually part of a geometric modeling package such as a CAD program, rendering uses mathematics to describe the location of a light source in relation to the object and to calculate the way in which the light would create highlights, shading, and variations in color. The degree of realism can range from opaque, shaded polygons to images approximating photographs in their complexity." -
3 scanner
An optical input device that uses light-sensing equipment to capture an image on paper or some other object. Captured image data is converted into binary files that can be stored and manipulated by computer programs. -
4 transparency
The quality that defines how much light passes through an object's pixels.
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