Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

Thread Subject:
Need help

Subject: Need help

From: Krishna Chaitanya Nosina

Date: 28 Dec, 2012 06:27:06

Message: 1 of 3

Hi,
    Please help me in reading 3x3 matrix at a time from 256x256 image coefficients and the process will be repeated for all the pixel values.

Subject: Need help

From: anyone

Date: 30 Dec, 2012 20:12:10

Message: 2 of 3

On Fri, 28 Dec 2012 06:27:06 +0000, Krishna Chaitanya Nosina wrote:

> Hi,
> Please help me in reading 3x3 matrix at a time from 256x256 image
> coefficients and the process will be repeated for all the pixel
> values.

using R2012b, Windows? if so, F1 -> Matlab -> Language Fundamentals.
try Ctrl-+ to increase text size.
 

Subject: Need help

From: Image Analyst

Date: 31 Dec, 2012 04:44:12

Message: 3 of 3

"Krishna Chaitanya Nosina" <nkc_abbas@yahoo.co.in> wrote in message <kbje3q$evs$1@newscl01ah.mathworks.com>...
> Hi,
> Please help me in reading 3x3 matrix at a time from 256x256 image coefficients and the process will be repeated for all the pixel values.
-----------------------------------------------------------------------------------
Krishna :
I suggest you use imfilter() or conv2(). Or you can use blockproc(). Or (last resort) you can do it yourself with 4 for loops, the outer two over rows and columns, and the inner two over the 3 by 3 sliding window. What operation do you plan on doing in that sliding window?
Image Analyst

Tags for this Thread

No tags are associated with this thread.

What are tags?

A tag is like a keyword or category label associated with each thread. Tags make it easier for you to find threads of interest.

Anyone can tag a thread. Tags are public and visible to everyone.

Contact us