Top 5% contributor
7 months ago
Thank you guys.
Answered 8 months ago
I am trying to calculate the 3 angles of each triangle generated by Delaunay triangulation. For example, I have already obtained...
Asked 8 months ago
This is a DFT magnitude graph of a set of 1D points. How can I analyze it?
Can I say that the lowest frequency contribute most ...
Asked 1 year ago
thank you all, guys.
Answered 2 years ago
However, I found where the problem happens.
If I calculate standard deviation of an image without converting it into double, i...
I want to convert tif grayscale image into other forms, such as jpeg, png, or others.
I searched with Google but no u...
Asked 2 years ago
Hello, I am trying to implement an alogrithm of evaluating fingerprint image quality. This is one of the algorithms presented ...
2 years ago
I am trying to find a center or estimated center of a convex hull of a set of points. In Matlab, we can obtain the convex hull o...
My code is shown below, and I opened the built-in function. I found it just calculates the square root or variance. S...
I have a code segment of generating gaussian noise, but I don't understand why it does so.
I want to swap a vector like below, Is there a built-in function in Matlab?
a = [ 1 2 3 4 5 6 ]
a = swap(a) = [...
For example, I have 20 2D points, as the input signal.
(xi, yi) i = 1...Z ,
Assume that Z = 20, i.e. 20 points.
How can I cal...
I am using Matlab2011a. I want to compile a external toolbox which needs to use Borland C++. But Matlab doesn't seem to support ...
Asked 12 months ago
Assume I have a set of point coordinates in a 2D plane.
x = [ 16 16 16 17 18 19 19 20 21 2...
I am reading something about ROC curve. And I found that the curve is different given in different publications. So, I...
I have a set of spacial point, i.e. coordinate (x,y) of each point. I want to use the gaussian mixture model. But, how...
For example, I have an image of 400*360.
I want to draw small grids over a region of the image. E.g. draw small grids of 20*20 ...
For example, 10 points' coordinates are known, as (xi, yi) i =1 ... 10
and a corresponding angle of each point is known, as ai
I want to implement an approach for calculating Phase spectrum of a set of coordinates. In the paper, it is described as 3 equat...
I want to ask a question about calculating a measurement of an image feature vector.
For an image, several feature w...
Acutally, I want to generate a 3-D plot for a Gabor filter's (2D matrix) real part and imaginary part. But I don't kn...
I download a code at vision lab of UCSB. It is about Gabor wavelet, and there are something that I don't understand in the code....
Hello, I want to ask a question about calculating a measurement of an image feature vector. For an image, several feature were...
1 year ago
Hello, I want to that described in the title.
How can I calculate the 3rd values. Is that the gradient or something else? Thank...
Asked 1 month ago
I am trying to write some 2D coordinates into a binary file. However, what I read from the file that had been writen i...
Asked 2 months ago
For example, there is an image on which I have a set of points and the vertices of the convex hull of these points. We...
Asked 5 months ago
For example, I have a group of points in 2D plane.
Then, I make a probplot (normal) of them.
p = [xi, yi] i = 1, ..., N...
Asked 7 months ago
I want to calculate the distance between each block centered at (xi, yi) and the centroid of fingerprint image located at (xc, y...
Asked 9 months ago
Suppose that one object has two properties, and they are two discrete variable, as X and Y. The population number of both X and ...
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