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MatlabEnthusiast


Last seen: presque 2 ans il y a |  Actif depuis 2014

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Question


Remove pixel whose value is below given threshold
Hello, how can i remove pixels from an image whose values are below/above a given threshold value? As far as I know images in M...

environ 2 ans il y a | 4 réponses | 0

4

réponses

Question


image block clustering using kmeans
Hi all. I have block from an image obtained using: BlockImage = im2col(A,[m n],'distinct') How best can I cluster similar bl...

environ 2 ans il y a | 1 réponse | 0

1

réponse

Question


get distnct blocks contained in a given matrix.
Hello. Lets say an image of size [M N] to blocks of size [i j] each. using the following piece of code: A = im2col(im,[i j],'di...

plus de 2 ans il y a | 1 réponse | 0

1

réponse

Question


how to extract frames from video using video reader efficiently
Hello. I extract frames from a video with file extension .mp4 using the code below following this discussion: vid = VideoRe...

presque 3 ans il y a | 1 réponse | 0

0

réponse

Question


use gpu for image processing
hello, I have created about 1500 images on disk. I process them, store the results as mat files on disk, say image1_result1.mat,...

presque 3 ans il y a | 1 réponse | 0

1

réponse

Question


pre-define a struct/array of structs in attempt to get rid of out of memory error.
Hello, how can i pre-define an array/struct of structs? Motivation. I was dynamically creating an array that grew with every ite...

presque 3 ans il y a | 2 réponses | 0

2

réponses

Question


Image format converstions for processing
hello, all. i have an rgb image of class uint8 with dimension m-by-n-by-3 that i need to convert to double with dimensions m-by-...

presque 3 ans il y a | 1 réponse | 0

1

réponse

Question


unable to perform assignment error in im2col
Hello, I think am making a basic error somewhere but I can not figure it out yet. How best can I achieve this, or what type of ...

plus de 3 ans il y a | 1 réponse | 0

1

réponse

Question


Retain rgb image after processing
Hi all. how are you? How can I retain a colored image from a processed image. I know how to extract RGB color components(chan...

plus de 4 ans il y a | 1 réponse | 1

1

réponse

Question


How to plot a 2d potential function
Hi all. Today I came across a function f(X,Y) = cos(2*pi*X)(1+3Y) + ((2*pi*y)^2)/2. I thought this was a 3d function but appar...

environ 5 ans il y a | 1 réponse | 0

1

réponse

Question


Solving a homogenous non linear system of equations in MATLAB
Hi all, I have the following homogeneous system. I am wondering how I can solve this in MATLAB, that is if it even has a solutio...

presque 7 ans il y a | 1 réponse | 0

1

réponse

A résolu


Eight Queens Solution Checker
Write a function to verify whether an arrangement of queens on a chessboard is a valid solution to the classic <http://en.wikipe...

plus de 8 ans il y a

A résolu


Help the Patriots get to the Super Bowl
Given a football by the Patriots, return it to them with 2 psi less air in it. (The original psi is passed as a number to the...

plus de 8 ans il y a

A résolu


Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

plus de 8 ans il y a

A résolu


Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

plus de 8 ans il y a

A résolu


Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

plus de 8 ans il y a

A répondu
Viewing answers numerically from pdetool box
Thanks very much, am definitely trying it out tomorrow and letting you know if anything weird, or cool happens. thanks for the r...

presque 10 ans il y a | 0

Question


Viewing answers numerically from pdetool box
hi all, how can i view the answers to a given pde that i solved using the pde tool? i want to see the solution matrix but the p...

presque 10 ans il y a | 2 réponses | 1

2

réponses