ITEC2110 Summer 2010 Test 2, Dr. Jim Rowan
All the parts of this test including the images are found in the folder named: Test2. In that
folder you will find two folders, convolution and images. Drag the images folder to the
Preview application and all of them will open and allow easy comparison.
1)- In the convolution folder you will find a file named “convolutionCalculationV1.ppt”.
Opening the powerpoint slide 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 with an X on the resulting image matrix.
2)- In the convolution folder you will find a file named “convolutionCalculationV2.ppt”.
Opening the powerpoint slide 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 with an X on the resulting image matrix.
3) solid.jpg shows two objects, a cube and a sphere that have been moved to where they
share some of the same space. Which of the images (solid.jpg, cubeSphereSolid.jpg,
solid2.jpg and solid3.jpg) shows the difference of the sphere minus the cube?
4) solid.jpg shows two objects, a cube and a sphere that have been moved to where they
share some of the same space. Which of the images (solid.jpg, cubeSphereSolid.jpg,
solid2.jpg and solid3.jpg) shows the intersection of the two objects?
5)- solid.jpg shows two objects, a cube and a sphere that have been moved to where they
share some of the same space. Which of the images (solid.jpg, cubeSphereSolid.jpg,
solid2.jpg and solid3.jpg) could show the union of the cylinder and cube seen in
imageA6.jpg?
6)- cubeSphereSolid.jpg shows two objects, a cube and a sphere that have been moved to
where they share some of the same space. cubeSphereWire.jpg and cubeSphereWire2.jpg
both show wireframe depictions of these two objects. Which one could show the union
of the sphere and cube?
7)- A given vector is defined by the two points, (2.2, -2.7) and (1.4, 3.5). What is the
displacement of this vector?
8)- Looking at objectManipulation.jpg you see 6 numbered, colored blocks. Which of the
6 blocks would be the result of reflecting block 1 across a horizontal axis?
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 technique is used to smooth
the appearance of this jagged line?
10)- What kind of model building technique does Blender use?
11)- tableImage1V2.jpg is a small (3 X 3 pixel) image. The 24 bit RGB color codes are
as follows:
color 1
255,0,0
color 2
0,255,255
color 3
255,255,255
color 4
255,102,0
color 5
0,0,255
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)- tableImage2V2.jpg is a small (3 X 3 pixel) image. The 24 bit RGB color codes are
as follows:
color 1
0,0,255
color 2
0,255,255
color 3
255,255,255
color 4
255,102,0
Write out the bitmapped portion of a table (aka dictionary) encoding of this image using
the minimum number of bits needed to encode these 4 colors.
13)- Referring to #12 above, how many bytes long would this file be if you include both
the color table and the bitmap?
14)- In tableImage2V2.jpg we have an image that measures 3 pixels by 3 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 affected by the complexity of
the image?
16)- What is it about human vision that JPEG image compression takes advantage of in
order to compress a file?
17)- A vector is defined by two characteristics. What are they?
18)- What is one form of optical mixing that sacrifices resolution at the altar of color
accuracy?
19)- (yes - no) The RGB color model, aka the tri-stimulus model of color, is modeled
after human color vision and derives from the 3 different cones found in the human eye.
For this reason it can accurately represent the entire gamut of colors that can be seen by
humans.
20)- Using the CMYK model, magenta is what you get when you remove what color or
colors from white?
21)- Using the CMYK model, magenta 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 yellow
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 and green 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 half that many colors?
25)- Blender primarily used one form of model building mentioned in #10 above. Name
another form of model building discussed in class.