ITEC2110 Summer 2012 Test 2, Dr. Jim Rowan
1)- Opening convolutionProblem1Spring2011.ppt will reveal a black and white image,
a section of the image showing pixel values, a convolution mask and a resulting image
matrix. Calculate the 3 pixels marked X1, X2, and X3 on the resulting image matrix.
2)- Opening convolutionProblem2Spring2011.ppt will reveal a black and white image,
a section of the image showing pixel values, a convolution mask and a resulting image
matrix. Calculate the 3 pixels marked X1, X2, and X3 on the resulting image matrix.
3) Is convolution an example of pixel point processing or pixel group processing?
4) Of bitmapped images and vector graphic images which gives access to the objects in
the image by the simple nature of the way the image is stored?
5) If the operating system knows the application window is at the absolute location
(100,200) and the application knows that the bounding box for an animated character is at
the relative location (50,100), what is the absolute location of the bounding box?
6) Is run length encoding a lossy or lossless compression technique?
7)- A given vector is defined by the two points, (2.2, -0.6) and (-4.2, 2). What is the
displacement of this vector?
8)- JPEG compression uses the fact that humans don’t see high frequency changes as well
as low frequency changes. What does JPEG do with this information to reduce the size of
the file?
9)- Displaying a vector graphic on a computer display like the ones we have in the lab is
accomplished by converting the vector graphic to a bitmapped graphic. Invariably the
result will be a jagged line rather than a smooth one. To make this jagged line look more
smooth what can be done?
10)- Under what conditions is a table encoded image a lossy compression technique?
11)- 4x3-4colorRLEimage.jpg is a small (4 X 3 pixel) image. The 24 bit RGB color
codes
are shown below the image. Allowing one byte for the “count” portion of the encoding,
write out the string of bytes that would result from a run length encoding of that image.
12)- 4x3-6colorTableEncodingImage.jpg is a small (4 X 3) pixel image. The 24 bit RGB
color codes are shown below the image.
Write out the bitmapped portion of a table encoding of this image using the minimum
number of bits needed to encode these 6 colors.
13)- Referring to #12 above, how many bytes in length would this file be if you include
both the color table and the bitmap but ignoring the header?
14)- 4x3-6colorUncompressed24bitRGB.jpg is a small (4 X 3) pixel image. The 24 bit
RGB color codes are shown below the image. If this were to be stored as an
uncompressed, 24 bit RGB image, how many bytes would it be in length?
15)- Which type of image, bitmapped or vector graphic, is affected by the complexity of
the image?
16)- With 16 bit RGB green gets 6 bits while red and blue gets only 5 bits. That extra bit
gives green how many additional shades than red and blue have?
17)- A vector is defined by two characteristics. What are they?
18)- What is the process called that allows you to use only black ink but produce 5
different shades of grey from white to black?
19)- What is it about the human eye that the tri-stimulus model is derived from?
20)- What is one of the artifacts that frequently rises from the use of nearest color when a
color in an image does not occur in the color table.
21)- Yellow is what you get when you mix what colors of light?
22)- Holding a ball painted with pure green paint you enter a room that is lit with cyan
colored light. What color does the ball appear to be in this room?
23)- Holding a ball painted with white paint you enter a room that is lit with equal
amounts of red, blue and green light. What color does the ball appear to be in this room?
24)- How many different colors can 24 bit color can produce?
25)- Mixing red and green light results in what color?