writing my own sobel filter convolution - something is wrong

Posted on 16th Feb 2014 07:03 pm by admin

I am trying to keep it very simple, I cant see anything wrong with my logic, could anybody help point me to the right direction?!!


Code: { int Shorizontal[] = {-1, 0, 1, -2, 0, 2, -1, 0, 1}; int Svertical[] = {1, 2, 1, 0, 0, 0, -1, -2, -1}; for (int x = 0; x < image.dimx(); x++) for (int y = 0; y < image.dimy(); y++) for (int c = 0; c < 3; c++) // loop through colour channels { int counter = 0; float tempH = 0; float tempV = 0; for (int a = -1; a <= 1; a++) for (int b = -1; b <= 1; b++) if (x + a >= 0 && x + a <= image.dimx() && y + b >= 0 && y + b <= image.dimy()) { tempH += image(x + a,y + b,0, c) * Shorizontal[counter]; tempV += image(x + a,y + b,0, c) * Svertical[counter]; counter++; } image(x,y,0,c) = sqrt(pow(tempH,2) + pow(tempV,2)); } }

Your Answer:

Login to answer

Other forums

A Few Questions
Hi, I want to ask a few questions that I can't seem to find..

1) I'm creating a "shortcu

Notice Undefined index: reset/ Attempting to redirect, works, but get a notice
Full Header.php is:
Code: [Select]<?php
$reset= false;
$reset= strip_tags($_GET[&quo

PHP doesn't send my mail
Hi all, I found this and used it to send mail. Simple contact form with some required fields. The va

php + mysql count consecutive data
I have a database of values and I want to work out how to display them if the values match a consecu

Referential Integrity problem when inserting into 2 tables at same time
Hello Everyone,

Im relativity new to PHP and MySQL and i have come up against a problem. i h

Chat Box in PHP
I was thinking in doing a Chat Box in PHP. For that I would use a form with two fields, Nick and Mes

PHP Upload issue
Hi guys,

I have stumble across an interesting issue with my script and is doing my head in.

.htpasswd Registration Form
Hi,
I wanted to make an htpasswd registration form.
I found this code on the internet but have

Sort a two dimensional array.
Hi. I've set up a two dimensional array that reads as follows:

Code: $modifiedData = array(

login page does not execute a else statement
I've created a login page using sessions.
When an incorrect user name or password is entered then