ITEC2110 Summer 2011 Test 2, Dr. Jim Rowan
The images used in this test can be found in the folder named: test2Images(2110-01).
1)- Opening ConvolutionCalculationTest2Question1.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 ConvolutionCalculationTest2Question2.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) Given the two objects seen in wireframeImage1:, which of wireframeImage2: through
wireframeImage5: would be best described as the difference of the sphere and the cone?
4) Given the two objects seen in wireframeImage1:, which of wireframeImage2: through
wireframeImage5: would be best described as the intersection of the cone and the
sphere?
5) Given the two objects seen in wireframeImage1:, which of wireframeImage2: through
wireframeImage5: would be best described as the union of the cone and the sphere?
6) Given the two objects seen in wireframeImage1:, which of wireframeImage2: through
wireframeImage5: would be best described as the difference of the cone and the sphere?
7)- A given vector is defined by the two points, (1.0, 2.5) and (1.2, 3.5). What is the
displacement of this vector?
8)- What is it about human vision that JPEG image compression takes advantage of in
order to compress a 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. What term is used to refer to this
jagged line?
10)- What kind of model building technique does Blender use?
11)- encodingImage1: is a small (3 X 4 pixel) image. The 24 bit RGB color codes are as
follows:
orange
237, 132, 30
white
255,255,255
blue
0, 59, 250
cyan
120, 248, 254
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)- encodingImage2: is a 5 X 5 pixel image. The 24 bit RGB color codes are as follows:
orange
237, 132, 30
white
255,255,255
red
255, 0, 0
cyan
120, 248, 254
green
67, 139, 23
blue
0, 59, 250
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 ignoring the header?
14)- Again, in encodingImage3: we have an image that measures 3 pixels by 4 pixels. 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 not affected by the complexity
of the image?
16)- Holding a ball that is painted blue, you enter a room that is lit with equal amounts of
red and blue colored light. What color does the ball appear to be in this room?
17)- A vector is defined by two characteristics. One is length, the other is what?
18)- What is one form of optical mixing that sacrifices resolution at the altar of color
accuracy?
19)- What is it about the human eye that the tri-stimulus model is derived from?
20)- Using the CMYK model, cyan is what you get when you remove what color or
colors from white?
21)- Using the CMYK model, cyan is what you get when you mix what colors of light?
22)- Holding a ball painted with pure blue paint you enter a room that is lit with equal
amounts of red and green 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 blue and red light. What color does the ball appear to be in this room?
24)- 24 bit color can produce 16,777,216 different colors. How many bits would you
need to have only 262,144 colors?
25)- Blender primarily used one form of model building mentioned in #10 above. Name
one other form of model building discussed in class.