How is the working of Wavelet Filter Coefficients which are mentioned below ?

Renjith V Ravi @Renjith_Ravi4

01 January 1970 0 7K Report

While executing the Matlab Command

Lo_D,Hi_D,Lo_R,Hi_R] = wfilters('db4')

I obtained the following coefficients for the db4 2D wavelet filters

[Lo_D,Hi_D,Lo_R,Hi_R] = wfilters('db4')

Lo_D = [-0.0106 0.0329 0.0308 -0.1870 -0.0280 0.6309 0.7148 0.2304]

Hi_D = [-0.2304 0.7148 -0.6309 -0.0280 0.1870 0.0308 -0.0329 -0.0106]

Lo_R = [0.2304 0.7148 0.6309 -0.0280 -0.1870 0.0308 0.0329 -0.0106]

Hi_R = [-0.0106 -0.0329 0.0308 0.1870 -0.0280 -0.6309 0.7148 -0.2304]

Kindly help me to understand,how, these coefficients will process an image

Badges
Science topic

More Renjith V Ravi's questions See All

How the test image "Lena" is particular than other test images?

How the test image "Lena" is particular than other test images?. Why this image is good testing for image compression algorithms.

31 December 2017 263 7 View

What is the reason the test image "Cameraman" is used widely to test algorithms in image processing and image encryption?

11 December 2017 1,001 5 View

What is diffusion process in image encryption?

If I create a random matrix D(i,j) using any chaotic map and XOR a plain image P(i,j) with it and obtained a cipher image C(i,j).Can I call this process as diffusion in image encryption. C(i,j) =...

08 September 2017 9,752 0 View

Will there be any compression at bpp = 1 ?

02 March 2017 3,395 11 View

Wavelet Based image compression ?

I am working with Wavelet + SPIHT based image compression.For cameraman image there are getting different PSNR values for different images. What about the compression ratio.Will there be any...

02 March 2017 7,029 13 View

Please help me to identify the correct method for finding the image compression ratio ?

Here I have mentioned three methods for finding the compression ratio in Matlab .Kindly help me to identify which one is theoretically correct. clear allclc%Read the input...

02 March 2017 5,259 0 View

Can Anybody suggest me a SCOPUS indexed journal, which is accepting manuscripts in LaTeX format ?

Can Anybody suggest me a SCOPUS indexed journal with less review time, which is accepting manuscripts in LaTeX format ?

02 March 2017 7,098 1 View

Are the following journals indexed in Thomson Reuters ?

01 February 2017 2,813 3 View

What is the difference between histogram deviation(H.D) and Maximum Deviation Measuring Factor(M.D.M.F) in image encryption ?

What is the difference between histogram deviation(H.D) and Maximum Deviation Measuring Factor(M.D.M.F) in image...

01 January 1970 9,917 0 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

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

Do you know any MR image dataset?

I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.

02 March 2021 7,735 3 View