To create a digital image, we need to convert
the continuous sensed data into digital form.
This involves two processes: sampling and quantization
the continuous sensed data into digital form.
This involves two processes: sampling and quantization
Anonymous Quiz
96%
T
4%
F
The amplitude of f at spatial coordinates (x, y) gives
the intensity (brightness) of the image at that point
the intensity (brightness) of the image at that point
Anonymous Quiz
87%
T
13%
F
The amount of source light
incident on the scene being viewed
incident on the scene being viewed
Anonymous Quiz
90%
Illumination
10%
Reflectance
The amount of light
reflected by the objects in the scene
reflected by the objects in the scene
Anonymous Quiz
4%
Illumination
96%
Reflectance
The function f(x,y) may be characterized by
two components: .... & ......
two components: .... & ......
Anonymous Quiz
27%
sampling - quantization
73%
Illumination - Reflectance
choose the right formula
Anonymous Quiz
16%
f(x,y) = i(x,y) + r(x,y)
6%
f(x,y) = i(x,y) - r(x,y)
76%
f(x,y) = i(x,y) . r(x,y)
2%
f(x,y) = i(x,y) / r(x,y)
choose the right formula
Anonymous Quiz
11%
- ∞ < i(x,y) < ∞
20%
0 < i(x,y) < 1
65%
0 < i(x,y) < ∞
4%
-1 < i(x,y) < 1
choose the right formula
Anonymous Quiz
6%
-∞ < r(x,y) < ∞
18%
0 < r(x,y) < ∞
73%
0 < r(x,y) < 1
3%
-1 < r(x,y) < 1
Number of bits required
to store a digitized
image
to store a digitized
image
Anonymous Quiz
86%
b=M * N * k
7%
b=M * N * L
6%
b=M * L * k
0%
b=L * N * k
M : Rows
N : Columns
K : Number of bits to represent a one pixel
L : Number of gray levels
يعني مثلا لو عندي 256 جراي ليفل يبقى البيكسل الواحدة ب8 بت علشان
L = 2^K
N : Columns
K : Number of bits to represent a one pixel
L : Number of gray levels
يعني مثلا لو عندي 256 جراي ليفل يبقى البيكسل الواحدة ب8 بت علشان
L = 2^K
... is a measure of
the smallest discernible detail in an image
the smallest discernible detail in an image
Anonymous Quiz
30%
spatial coordinates
70%
spatial resolution
... can be stated
in a number of ways, with line pairs per unit
distance, and dots (pixels) per unit distance
in a number of ways, with line pairs per unit
distance, and dots (pixels) per unit distance
Anonymous Quiz
41%
spatial coordinates
59%
spatial resolution
is a measure of image
resolution used commonly in the printing and
publishing industry
resolution used commonly in the printing and
publishing industry
Anonymous Quiz
16%
line pairs per unitdistance
84%
dots (pixels) per unit distance
To say
that an image has, say, a resolution 1024*1024
pixels is a meaningful statement
that an image has, say, a resolution 1024*1024
pixels is a meaningful statement
Anonymous Quiz
51%
T
49%
F