What is the difference between 'imnoise' of MATLAB and "noisy_image = original_im + sqrt(variance)*randn(n,m) + mean"?

11 December 2014 4,893 3 View

Is Time-Frequency Joint Representation of a signal for Discrete Haar Wavelet Transform possible ? If yes, Then How ?

As Haar is multi-resolution technique (MRA) for signal representation, i.e the window used in Haar is not constant unlike STFT. Hence it is very easy to identify the variation of signal's...

05 June 2014 6,543 3 View

What is unequally spaced fast fourier transform (USFFT)?

Can anyone please give an example of an unequally spaced signal? If possible please suggest me any paper regarding the understanding of USFFT and its algorithm.

04 May 2014 3,900 6 View

Do you know of a database to test image thresholding to separate object from background?

I have implemented some thresholding methods and need some standard database for testing. Can someone suggest some sites for classification of image object and background? It will be better if the...

11 December 2013 2,446 5 View

How to measure similarity or dissimilarity between two data set?

How to measure similarity between two data vectors, as like "Correlation coefficient".

11 December 2013 2,493 14 View

Relation between data cluster and ROC curve parameter?

I have a bunch of methods for image thresholding and, I created a reference image without using any ground truth from the existing methods (Say the mean of all thresholded value of an image is the...

07 August 2013 1,023 5 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View