Which one is not limitation of matting algorithm?
2D Taylor series expansion near (0,0)
Direction derivative of I in direction (
)What is OpenCV?
OpenCV is an open source computer vision library+
Is an open source program for generating 3В images
Is a tool for extracting foreground images from any background
What is visible spectrum corresponds to light wavelength?
400 to 700 nm+
300 to 700 nm
100 to 500 nm
700 to 900 nm
How many components (color) in array of each pixel are used in computer graphic?
4+
3
2
1
What is matting?
Separating a desired foreground image from a background of a constant color+
Separating two images and combining them into 3d image
Painting image from pieces to other image
Binding different pieces
Which is matting equation?
C= C0 +(1-a0)Ck+
C= C0 +(a0-1)Ca
C= (C0 + a0)Ck
C= (1-a0)Ck -C0
In one of matting solution if we know that there is no Blue Color, what is the value of component b in rgb?
0+
1
1,5
1,7
Equation of Image Gradient
1+
2
3
4
Equation of Image Laplacian
1+
2
3
4
General Sum Notation of Cross-Correlation
1+
2
3
4
What is the goal of Gaussian pyramid
Develop representation to decompose images into information at multiple scales, to extract features or structures of interest, to attenuate noise+
Some other answer
Some other answer
Equation of Convolution
+
Equation of Convolution in 2D(MxN -image)
+
Equation of Downsampled and Smoothed Image
(2i
– m, 2j – n)+
(3i
– m, 3j – n)
General Expression of REDUCE() function
+
(2i
– m, 2j – n)
Main Idea of Laplacian Pyramid
Rather than store smoothed images, store only the difference, between levels Gl and G(l+1)
Develop representation of decomposed images into information at multiple scales
Extract features or structures of interest
Rather than store smoothed images, store only the convolution coefficient, between levels Gl and G(l+1)
Equation of EXPAND(
)
function
EXPAND(
)
(
,
)+EXPAND(
)
(
,
)EXPAND(
)
(2i
– m, 2j – n)EXPAND(
)
=
(3i
– m, 3j – n)
Equation of EXPAND(
)
function in 1D
=
+
=
=
(
,
)
How many arguments can take function cvLoadImage()
2+
1
3
4
How many arguments can take function cvReleaseImage()
1+
2
3
4
How many arguments if function glTranslatef()
3+
1
2
4
How many arguments if function gluSphere()
4+
1
2
3
How many arguments in function glRotatef()
4+
1
2
3
What mean the 1st argument in function glRotatef()
Angle+
Axis
Mode
Control variable
How many arguments in function glScalef()
3+
1
2
4
The unit vectoris
vector is a vector of length 1+
unique vector
vector orthogonal to normal
usual vector