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31 Cards in this Set

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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.

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.

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.

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.

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.

The term pixel is contracted from the words ______ and _______.

Picture, Element

True or False: A pixel is a point sample, not a little square.

True

True or False: A 1-bit color depth allows only black and white colors.

False

A 1-bit color depth allows _____ colors.

2

An 8-bit color depth allows _____ colors.

256 or 2^8

A 24-bit color depth allows _______ colors.

2^24

Bitmapped images are composed of ______.

Individual pixels, which represent spatial samples of the image or scene.

Vector graphics are composed of ________.

Mathematical descriptions of image elements, which include points, lines, curves, and shapes.

The main advantage(s) of bitmapped images over vector graphics is (are) _______.

Ease of editing the image content pixel by pixel.

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.

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

Generally speaking, how does the file size change if the total number of pixels of an image is doubled?

The file size will double.

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.

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.

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.

What are the primary colors in the RGB color model?

Red, Green, and Blue

What are the primary colors in the CMY color model?

Cyan, Magenta, Yellow

What are the primaries in the HSB color model?

Hue, Saturation, and Brightness

Which color model take the form of a color cube?

RGB

Which color model takes the form of a hexacone?

HSB

What of the primaries in the HSB color model takes the form of a color wheel?

Hue

What is the color mixing method for the RGB color model?

Additive

What is the color mixing method for the CMY color model?

Subtractive

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.

What's an example of an image file type that supports lossy compression?

JPEG

What's an example of an image file type that supports lossless compression?

PNG