Chapter 2
What are the theoretical CMY values for
(i) white 0%, 0%, 0% (ii) black 100%, 100%, 100% (iii) red 0%, 100%, 100% (iv) green 100%, 0%, 100% (v) blue 100%, 100%, 0% (vi) cyan 100%, 0%, 0% (vii) magenta 0%, 100%, 0% (viii) yellow 0%, 0%, 100%
For the 24-bit color depth, what are the RGB values for
(i) white 255, 255, 255 (ii) black 0, 0, 0 (iii) red 255, 0, 0 (iv) green 0, 255, 0 (v) blue 0, 0, 255 (vi) cyan 0, 255, 255 (vii) magenta 255, 0, 255 (viii) yellow 255, 255, 0
What are the HSB values for
(i) white hue does not matter, 0%, 100% (ii) black hue does not matter, saturation does not matter, 0% (iii) red 0, 100%, 100% (iv) green 120, 100%, 100% (v) blue 240, 100%, 100% (vi) cyan 180, 100%, 100% (vii) magenta 300, 100%, 100% (viii) yellow 60, 100%, 100%
An 1-bit color depth allows _____ colors.
2
A 24-bit color depth allows _____ colors.
2^24
An 8-bit color depth allows _____ colors.
2^8 or 256
Which of the following color models takes the form of a color cube?
A. RGB
What is the color mixing method for the RGB color model?
A. additive
A digital image captured at a higher resolution _____ than it would have if it had been captured at a lower resolution
A. captures more details D. has a larger file size E. has larger pixel dimensions F. uses a higher sampling rate
Which of the primaries in the HSB color model takes the form of a color wheel?
A. hue
Bitmapped images are composed of _____.
A. individual pixels, which represent spatial samples of the image or scene
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
The main advantage(s) of vector graphics over bitmapped images is (are) _____.
A. scalability or resolution independence of images C. 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 _____.
B. aliasing
The main advantage(s) of bitmapped images over vector graphics is (are) _____.
B. ease of editing the image content pixel by pixel
A digital image captured at a higher bit depth _____ than it would have if it had been captured at a lower bit depth.
B. has more different colors C. has a larger file size
Vector graphics are composed of _____.
B. mathematical descriptions of image elements, which include points, lines, curves, and shapes
What is the color mixing method for the CMY color model?
B. subtractive
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 _____.
B. the pixel dimensions of the resulting digital image
Which of the following are file extensions of pixel-based files?
BMP, JPEG, PNG, GIF, JPG, PSD, and TIFF
Which of the following color models takes the form of a hexacone?
C. HSB
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, _____.
C. 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 are file extensions of vector graphic files?
FLA, EPS, WMF, SWF, and AI
True/False : An 1-bit color depth allows only black and white colors.
False
Give one example of the image file type that supports lossy compression and one that supports lossless compression
Lossy: JPEG Lossless: PNG, GIF, PSD, TIF
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 total number of pixels of an image is doubled?
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 increases by 3 times.
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 increases by 4 times.
Why don't the colors in a printed image look exactly the same as those you see on the computer screen?
The printer and the computer display have different color gamuts. Some colors that a computer display can display are out of the gamut of the printer. The out‐of‐gamut colors will be altered to fit within the printer's gamut.
True/False : A pixel is a point sample, not a little square.
True
What are the primary colors in the CMY color model?
cyan, magenta, and yellow
The term pixel is contracted from the words _____ and _____.
picture & element
What is the primary use of the CMYK color model?
printing
What are the primary colors in the RGB color model?
red, green, and blue
What are the primaries in the HSB color model?
hue, saturation, and brightness
