Answered
Replication Photoshop's Gaussian Blur and Unsharp Mask in MATLAB
Photoshop uses Integral Images approximation for the Gaussian Blur. Its Unsharp Mask is once applied for "Dark Halos" and o...

10 years ago | 0

| accepted

Answered
Vectorizing Calculation of the Autocorreltion function of a Matrix (Per Column)
It can be done using Toeplitz matrix.

10 years ago | 0

| accepted

Answered
Which MATLAB operations/functions need speeding up?
The function `im2col`. See here: http://www.mathworks.com/matlabcentral/answers/151941-efficient-implementation-of-im2col...

10 years ago | 2

Answered
MATLAB's JIT Engine
Another look on the subject: http://justindomke.wordpress.com/2012/09/17/julia-matlab-and-c/ And they got much faster. ...

10 years ago | 0

Question

Create The Image Laplacian Matrix Effectively
Hello, I want to build the Spatial Laplacian of a given operation on an image. The Matrix is given by: <</matlabcentr...

10 years ago | 1 answer | 0

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answer

Answered
How can we find anisotropic 2*2 tensor in an image?
You may have a look at the code I published here: <https://github.com/JarnoRalli/PDE-based-image-processing/issues/1> If a...

10 years ago | 0

Question

Replication Photoshop's Gaussian Blur and Unsharp Mask in MATLAB
Hello, Has anyone succeeded to replicate Photoshop's Gaussian Blur and Unsharp Mask function up to a rounding error? Photosh...

10 years ago | 2 answers | 0

2

answers

Question

Calculating the Minimum and The Maximum of a Slidig Window
Hello, How would you create the fastest implementation to extract the Minimum and the Maximum of a Local Sliding Window over ...

10 years ago | 2 answers | 0

2

answers

Answered
Sliding window minimum and maximum filter
I would use: localMaxImage = colfilt(inputImage, [winLength winLength], 'sliding', @max); localMinImage = colfilt(inputI...

10 years ago | 1

Question

Constrained Weighted Least Squares (Image Interpolation)
Hello, I'd like your assistance with solving a constrained weighted least squares problem. I can't use `lsqlin` since the ...

10 years ago | 2 answers | 0

2

answers

Answered
How to apply Kalman filter on time series?
Kalman Filter is pretty straight forward, why not write it yourself? You can see all needed here: <https://en.wikipedia.or...

10 years ago | 0

Answered
Installing c++ compiler for MATLAB
I think you can use Microsoft Windows SDK: http://www.mathworks.com/support/compilers/R2014a/index.html Specifically: h...

10 years ago | 0

Answered
how can I make this code faster on the GPU?
Hopefully, next versions of MATLAB will support OpenCL 2.0. When that happens, CPU and GPU will use the same memory space which...

11 years ago | 0

Question

The Flop (Floating Point Operations per Second) Rate of MATLAB Code
Hello, I know Intel MKL / IPP libraries performance in simple operations (Multiplication, Summation, Matrix Multiplication, Vec...

11 years ago | 2 answers | 0

2

answers

Answered
Which MATLAB operations/functions need speeding up?
_filter_ As published in File Exchange, simple loop unrolling is much faster than the current implementation. Also the GPU ...

11 years ago | 0

Answered
Image processing technique in depth map concept
This would be estimating the "Depth Map" of the image by one image. I think it could be done by estimating the "Blur Level". ...

11 years ago | 0

Answered
Can MATLAB work well and paralellize code with AMD Radeon HD 7670m graphics card ?
Unfortunately, MATLAB doesn't support OpenCL. ATI is the right choice for GPGPU. MATLAB, at the moment, isn't. You can al...

11 years ago | 0

Answered
Calculate the number of days in a year
I would go something like that: firstDayInYear = '01/01/2012'; lastDayInYear = '31/12/2012'; firstDayInYearNum = ...

11 years ago | 0

Question

Multiply Image Pixels by a Matrix
Hello, Let's say I have a 3 channel image M -> [numRowx * numColumns * numChannels]. I also have a 3 by 3 matrix A (Color Conb...

12 years ago | 1 answer | 0

1

answer

Question

Solving a Bilinear Optimization Problem
Hello, I would like to optimize to following expression: <<http://i.imgur.com/ey7Hy.png>> Note: All are matrices. I'd l...

12 years ago | 1 answer | 0

1

answer

Question

Using the MX Matrix Library in General C Code
Hello. I'm trying to create a MEX filte. In order to debug the code I'm trying to compile it in Visual Studio. I'm replacin...

12 years ago | 2 answers | 0

2

answers

Question

Deploying Standalone Executable with No MCR
Hello. I have a simple M file which creates a GUI, let the user chose a text file, apply a simple manipulation on the text file...

12 years ago | 2 answers | 0

2

answers

Answered
Matlab 2012a
One of the most disappointing releases. Nothing really got improved :-).

12 years ago | 0

Answered
What is missing from MATLAB?
Built in 64 Bit Compiler to allow out of the box integration with Adobe Photoshop using 64Bit versions of the software.

13 years ago | 0

Question

Vectorizing Calculation of the Autocorreltion function of a Matrix (Per Column)
Hello. I have a matrix A = [1 2 3; 4 5 6; 7 8 9]; I want to calculate the Autocorrelation function of each of its col...

13 years ago | 2 answers | 0

2

answers

Answered
Basic probability question
Uniform distribution is always a good point to start from. Then just divide the range [0 1] to whatever ratio you'd like accord...

13 years ago | 0

Answered
how do i reverse a vector
This might work as well (For 1D Vectors): vReversed = v(end:-1:1); Good luck!

13 years ago | 6

Question

Converting Analog Filter into Digital Filter
Hello. I'm trying to design a simple Digital Filter. The transfer function of the filter is: 1 / s + alpha Where 'alpha' is ...

13 years ago | 3 answers | 0

3

answers

Answered
Plot question: Monthly data on yearly axis
If I'm guessing right what's your difficulty the fact that plot doesn't show "NaN" values should assist you. Meaning, Pad you...

13 years ago | 0

Answered
What R2011a feature do you like the most?
I can easily tell you what I don't like: * No internal 64 Bit compiler. * No real progress in the GPU support. * No optimizat...

13 years ago | 0