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31 Cards in this Set
- Front
- Back
The process of converting from analog to digital information is a two-step process-- sampling and quantizing. In converting an analog image to a digital image, the sampling rate affects _________.
A. The bit depth of the resulting digital image. B. The pixel dimensions of the resulting digital image. |
B. The pixel dimensions of the resulting digital image. |
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The process of converting from analog to digital information is a two-step process-- sampling and quantizing. In the quantization step, to convert an analog image to a digital image, ______. |
An infinite number of color shades and tones in an analog image is mapped to a finite set of discrete color values. |
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Which of the following factors will increase the file size of a digital image?
A. Larger pixel dimensions of the image B. Higher Color Depth |
Both A and B. |
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A digital image captured at a higher resolution _____ than it would have if it had been captured at a lower resolution. |
Captures more details, has a larger file size, has larger pixel dimensions, and uses a higher sampling rate. |
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A digital image captured at a higher bit depth ______ than it would have if it had been captured at a lower bit depth. |
Has more different colors, has a larger file size. |
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The term pixel is contracted from the words ______ and _______. |
Picture, Element |
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True or False: A pixel is a point sample, not a little square. |
True |
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True or False: A 1-bit color depth allows only black and white colors. |
False |
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A 1-bit color depth allows _____ colors. |
2 |
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An 8-bit color depth allows _____ colors. |
256 or 2^8 |
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A 24-bit color depth allows _______ colors. |
2^24 |
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Bitmapped images are composed of ______. |
Individual pixels, which represent spatial samples of the image or scene. |
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Vector graphics are composed of ________. |
Mathematical descriptions of image elements, which include points, lines, curves, and shapes. |
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The main advantage(s) of bitmapped images over vector graphics is (are) _______. |
Ease of editing the image content pixel by pixel. |
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The main advantage(s) of vector graphics over bitmapped images is (are) _________. |
Scalability or resolution independence of images, and more compact file size compared to bitmapped images. |
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Sometimes when you magnify a picture on your computer screen, lines that should be straight lines appear to be jagged. This effect is called _________. |
Aliasing |
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Generally speaking, how does the file size change if the total number of pixels of an image is doubled? |
The file size will double. |
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Generally speaking, how does the file size change if the number of pixels of both the width and height of an image are doubled? |
The file size will quadruple. |
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Generally speaking, how does the file size change if the bit depth of an image is increased from 8 bits to 16 bits? |
The file size doubles. |
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Generally speaking, how does the file size change if the bit depth of an image is increased from 8 bits to 24 bits? |
The file size triples. |
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What are the primary colors in the RGB color model? |
Red, Green, and Blue |
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What are the primary colors in the CMY color model? |
Cyan, Magenta, Yellow |
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What are the primaries in the HSB color model? |
Hue, Saturation, and Brightness |
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Which color model take the form of a color cube? |
RGB |
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Which color model takes the form of a hexacone? |
HSB |
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What of the primaries in the HSB color model takes the form of a color wheel? |
Hue |
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What is the color mixing method for the RGB color model? |
Additive |
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What is the color mixing method for the CMY color model? |
Subtractive |
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Why don't the colors in a printed image look exactly the same as those you see on the computer screen? |
The printer and computer display have different gamuts. |
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What's an example of an image file type that supports lossy compression? |
JPEG |
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What's an example of an image file type that supports lossless compression? |
PNG |