[FIXED] why the edge function give segmentation error

Issue

I am trying to write I could that can edit images according to Sobel filter algorithm but it still gives me segmentation error when I try to use edges function but I couldn't know the reason can any one tell me what is the error ?

the target of such project is to turn any picture to be edged by multiplying each pixel colors values with a corresponding matrix but when I do so I got segmentation fault error (core dump) what shall I do ?

#include <stdio.h>
#include <math.h>

#include "helpers.h"
//#include "bmp.h"

//variables for
//int Gx_sum_red, Gx_sum_blue, Gx_sum_green, Gy_sum_red, Gy_sum_blue, Gy_sum_green;



// Convert image to grayscale
void grayscale(int height, int width, RGBTRIPLE image[height][width])
{
    //int height_edited = 0;
    //int width_edited = 0;
    //printf("height is %i, width is %i and RGBTRIPLE IS %i for green, %i for blue and %i for red\n", height, width,
    //        image[height_edited][width_edited].rgbtBlue, image[height_edited][width_edited].rgbtGreen, image[height_edited][width_edited].rgbtRed);
    //RGBTRIPLE temp
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            image[i][j].rgbtBlue = (image[i][j].rgbtBlue + image[i][j].rgbtGreen + image[i][j].rgbtRed) / 3;
            image[i][j].rgbtGreen = (image[i][j].rgbtBlue + image[i][j].rgbtGreen + image[i][j].rgbtRed) / 3;
            image[i][j].rgbtRed = (image[i][j].rgbtBlue + image[i][j].rgbtGreen + image[i][j].rgbtRed) / 3;
        }
    }
    return;
}

// Reflect image horizontally
void reflect(int height, int width, RGBTRIPLE image[height][width])
{
    //int height_edited = height / 2;
    //int width_edited = width / 2;
    //printf("height is %i, width is %i and RGBTRIPLE IS %i for green, %i for blue and %i for red\n", height, width,
    //        image[height_edited][width_edited].rgbtBlue, image[height_edited][width_edited].rgbtGreen, image[height_edited][width_edited].rgbtRed);
    RGBTRIPLE temp;
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width / 2; j++)
        {
            temp.rgbtBlue = image[i][j].rgbtBlue;
            temp.rgbtGreen = image[i][j].rgbtGreen;
            temp.rgbtRed = image[i][j].rgbtRed;
            image[i][j].rgbtBlue = image[i][width - j].rgbtBlue;
            image[i][j].rgbtGreen = image[i][width - j].rgbtGreen;
            image[i][j].rgbtRed = image[i][width - j].rgbtRed;
            image[i][width - j].rgbtBlue = temp.rgbtBlue;
            image[i][width - j].rgbtGreen = temp.rgbtGreen;
            image[i][width - j].rgbtRed = temp.rgbtRed;
        }
    }
    return;
}

// Blur image
void blur(int height, int width, RGBTRIPLE image[height][width])
{
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            if (i == 0 && j == 0)
            {
                image[i][j].rgbtBlue = (image[i][j].rgbtBlue + image[i][j + 1].rgbtBlue + image[i + 1][j].rgbtBlue + image[i + 1][j + 1].rgbtBlue) / 4;
                image[i][j].rgbtGreen = (image[i][j].rgbtGreen + image[i][j + 1].rgbtGreen + image[i + 1][j].rgbtGreen + image[i + 1][j + 1].rgbtGreen) / 4;
                image[i][j].rgbtRed = (image[i][j].rgbtRed + image[i][j + 1].rgbtRed + image[i + 1][j].rgbtRed + image[i + 1][j + 1].rgbtRed) / 4;
            }
            else if (i == 0 && j == width - 1)
            {
                image[i][j].rgbtBlue = (image[i][j - 1].rgbtBlue + image[i][j].rgbtBlue + image[i + 1][j - 1].rgbtBlue + image[i + 1][j].rgbtBlue) / 4;
                image[i][j].rgbtGreen = (image[i][j - 1].rgbtGreen + image[i][j].rgbtGreen + image[i + 1][j - 1].rgbtGreen + image[i + 1][j].rgbtGreen) / 4;
                image[i][j].rgbtRed = (image[i][j - 1].rgbtRed + image[i][j].rgbtRed + image[i + 1][j - 1].rgbtRed + image[i + 1][j].rgbtRed) / 4;
            }
            else if (i == height - 1 && j == 0)
            {
                image[i][j].rgbtBlue = (image[i - 1][j].rgbtBlue + image[i - 1][j + 1].rgbtBlue + image[i][j].rgbtBlue + image[i][j + 1].rgbtBlue) / 4;
                image[i][j].rgbtGreen = (image[i - 1][j].rgbtGreen + image[i - 1][j + 1].rgbtGreen + image[i][j].rgbtGreen + image[i][j + 1].rgbtGreen) / 4;
                image[i][j].rgbtRed = (image[i - 1][j].rgbtRed + image[i - 1][j + 1].rgbtRed + image[i][j].rgbtRed + image[i][j + 1].rgbtRed) / 4;
            }
            else if (i == height - 1 && j == width - 1)
            {
                image[i][j].rgbtBlue = (image[i - 1][j - 1].rgbtBlue + image[i - 1][j].rgbtBlue + image[i][j - 1].rgbtBlue + image[i][j].rgbtBlue) / 4;
                image[i][j].rgbtGreen = (image[i - 1][j - 1].rgbtGreen + image[i - 1][j].rgbtGreen + image[i][j - 1].rgbtGreen + image[i][j].rgbtGreen) / 4;
                image[i][j].rgbtRed = (image[i - 1][j - 1].rgbtRed + image[i - 1][j].rgbtRed + image[i][j - 1].rgbtRed + image[i][j].rgbtRed) / 4;
            }
            else if (i == 0 && (j != 0 || j != width - 1))
            {
                image[i][j].rgbtBlue = (image[i][j - 1].rgbtBlue + image[i][j].rgbtBlue + image[i][j + 1].rgbtBlue +
                                        image[i + 1][j - 1].rgbtBlue + image[i + 1][j].rgbtBlue + image[i + 1][j + 1].rgbtBlue) / 6;
                image[i][j].rgbtGreen = (image[i][j - 1].rgbtGreen + image[i][j].rgbtGreen + image[i][j + 1].rgbtGreen +
                                         image[i + 1][j - 1].rgbtGreen + image[i + 1][j].rgbtGreen + image[i + 1][j + 1].rgbtGreen) / 6;
                image[i][j].rgbtRed = (image[i][j - 1].rgbtRed + image[i][j].rgbtRed + image[i][j + 1].rgbtRed +
                                       image[i + 1][j - 1].rgbtRed + image[i + 1][j].rgbtRed + image[i + 1][j + 1].rgbtRed) / 6;
            }
            else if (i == height - 1 && (j != 0 || j != width - 1))
            {
                image[i][j].rgbtBlue = (image[i - 1][j - 1].rgbtBlue + image[i - 1][j].rgbtBlue + image[i - 1][j + 1].rgbtBlue +
                                        image[i][j - 1].rgbtBlue + image[i][j].rgbtBlue + image[i][j + 1].rgbtBlue) / 6;
                image[i][j].rgbtGreen = (image[i - 1][j - 1].rgbtGreen + image[i - 1][j].rgbtGreen + image[i - 1][j + 1].rgbtGreen +
                                         image[i][j - 1].rgbtGreen + image[i][j].rgbtGreen + image[i][j + 1].rgbtGreen) / 6;
                image[i][j].rgbtRed = (image[i - 1][j - 1].rgbtRed + image[i - 1][j].rgbtRed + image[i - 1][j + 1].rgbtRed +
                                       image[i][j - 1].rgbtRed + image[i][j].rgbtRed + image[i][j + 1].rgbtRed) / 6;
            }
            else if (j == 0 && (i != 0 || i != height - 1))
            {
                image[i][j].rgbtBlue = (image[i - 1][j].rgbtBlue + image[i - 1][j + 1].rgbtBlue + image[i][j].rgbtBlue + image[i][j + 1].rgbtBlue +
                                        image[i + 1][j].rgbtBlue + image[i + 1][j + 1].rgbtBlue) / 6;
                image[i][j].rgbtGreen = (image[i - 1][j].rgbtGreen + image[i - 1][j + 1].rgbtGreen + image[i][j].rgbtGreen + image[i][j + 1].rgbtGreen +
                                         image[i + 1][j].rgbtGreen + image[i + 1][j + 1].rgbtGreen) / 6;
                image[i][j].rgbtRed = (image[i - 1][j].rgbtRed + image[i - 1][j + 1].rgbtRed + image[i][j].rgbtRed + image[i][j + 1].rgbtRed +
                                       image[i + 1][j].rgbtRed + image[i + 1][j + 1].rgbtRed) / 6;
            }
            else if (j == width - 1 && (i != 0 || i != height - 1))
            {
                image[i][j].rgbtBlue = (image[i - 1][j - 1].rgbtBlue + image[i - 1][j].rgbtBlue + image[i][j - 1].rgbtBlue + image[i][j].rgbtBlue +
                                        image[i + 1][j - 1].rgbtBlue + image[i + 1][j].rgbtBlue) / 6;
                image[i][j].rgbtGreen = (image[i - 1][j - 1].rgbtGreen + image[i - 1][j].rgbtGreen + image[i][j - 1].rgbtGreen + image[i][j].rgbtGreen +
                                         image[i + 1][j - 1].rgbtGreen + image[i + 1][j].rgbtGreen) / 6;
                image[i][j].rgbtRed = (image[i - 1][j - 1].rgbtRed + image[i - 1][j].rgbtRed + image[i][j - 1].rgbtRed + image[i][j].rgbtRed +
                                       image[i + 1][j - 1].rgbtRed + image[i + 1][j].rgbtRed) / 6;
            }
            else
            {
                image[i][j].rgbtBlue = (image[i - 1][j - 1].rgbtBlue + image[i - 1][j].rgbtBlue + image[i - 1][j + 1].rgbtBlue +
                                        image[i][j - 1].rgbtBlue + image[i][j].rgbtBlue + image[i][j + 1].rgbtBlue +
                                        image[i + 1][j - 1].rgbtBlue + image[i + 1][j].rgbtBlue + image[i + 1][j + 1].rgbtBlue) / 9;
                image[i][j].rgbtGreen = (image[i - 1][j - 1].rgbtGreen + image[i - 1][j].rgbtGreen + image[i - 1][j + 1].rgbtGreen +
                                         image[i][j - 1].rgbtGreen + image[i][j].rgbtGreen + image[i][j + 1].rgbtGreen +
                                         image[i + 1][j - 1].rgbtGreen + image[i + 1][j].rgbtGreen + image[i + 1][j + 1].rgbtGreen) / 9;
                image[i][j].rgbtRed = (image[i - 1][j - 1].rgbtRed + image[i - 1][j].rgbtRed + image[i - 1][j + 1].rgbtRed +
                                       image[i][j - 1].rgbtRed + image[i][j].rgbtRed + image[i][j + 1].rgbtRed +
                                       image[i + 1][j - 1].rgbtRed + image[i + 1][j].rgbtRed + image[i + 1][j + 1].rgbtRed) / 9;
            }
        }
    }
    return;
}


// Detect edges
void edges(int height, int width, RGBTRIPLE image[height][width])
{
    int red_avg, blue_avg, green_avg;
    int fGx_sum_red, fGx_sum_blue, fGx_sum_green, fGy_sum_red, fGy_sum_blue, fGy_sum_green;
    int red_sum, blue_sum, green_sum;
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            //calculating the Gx sum of red values
            if (i == 0 && j == 0)
            {
                fGx_sum_red = (image[i][j + 1].rgbtRed * 2) + (image[i + 1][j + 1].rgbtRed * 1);
                fGx_sum_blue = (image[i][j + 1].rgbtBlue * 2) + (image[i + 1][j + 1].rgbtBlue * 1);
                fGx_sum_green = (image[i][j + 1].rgbtGreen * 2) + (image[i + 1][j + 1].rgbtGreen * 1);//
                fGy_sum_red = (image[i + 1][j].rgbtRed * 2) + (image[i + 1][j + 1].rgbtRed * 1);//
                fGy_sum_blue = (image[i + 1][j].rgbtBlue * 2) + (image[i + 1][j + 1].rgbtBlue * 1);//
                fGy_sum_green = (image[i + 1][j].rgbtGreen * 2) + (image[i + 1][j + 1].rgbtGreen * 1);//
            }
            else if (i == 0 && j == width - 1)
            {
                fGx_sum_red = (image[i][j - 1].rgbtRed * -2) + (image[i + 1][j - 1].rgbtRed * -1);
                fGx_sum_blue = (image[i][j - 1].rgbtBlue * -2) + (image[i + 1][j - 1].rgbtBlue * -1);
                fGx_sum_green = (image[i][j - 1].rgbtGreen * -2) + (image[i + 1][j - 1].rgbtGreen * -1);//
                fGy_sum_red = (image[i + 1][j - 1].rgbtRed * 1) + (image[i + 1][j].rgbtRed * 2);//
                fGy_sum_blue = (image[i + 1][j - 1].rgbtRed * 1) + (image[i + 1][j].rgbtBlue * 2);//
                fGy_sum_green = (image[i + 1][j - 1].rgbtGreen * 1) + (image[i + 1][j].rgbtGreen * 2);//
            }
            else if (i == height - 1 && j == 0)
            {
                fGx_sum_red = (image[i - 1][j + 1].rgbtRed * 1) + (image[i][j + 1].rgbtRed * 2);
                fGx_sum_blue = (image[i - 1][j + 1].rgbtBlue * 1) + (image[i][j + 1].rgbtBlue * 2);
                fGx_sum_green = (image[i - 1][j + 1].rgbtGreen * 1) + (image[i][j + 1].rgbtGreen * 2);//
                fGy_sum_red = (image[i - 1][j].rgbtRed * -2) + (image[i - 1][j + 1].rgbtRed * -1);//
                fGy_sum_blue = (image[i - 1][j].rgbtBlue * -2) + (image[i - 1][j + 1].rgbtBlue * -1);//
                fGy_sum_green = (image[i - 1][j].rgbtGreen * -2) + (image[i - 1][j + 1].rgbtGreen * -1);//
            }
            else if (i == height - 1 && j == width - 1)
            {
                fGx_sum_red = (image[i - 1][j - 1].rgbtRed * -1)+ (image[i][j - 1].rgbtRed * -2);
                fGx_sum_blue = (image[i - 1][j - 1].rgbtBlue * -1) + (image[i][j - 1].rgbtBlue * -2);
                fGx_sum_green = (image[i - 1][j - 1].rgbtGreen * -1) + (image[i][j - 1].rgbtGreen * -2);//
                fGy_sum_red = (image[i - 1][j - 1].rgbtRed * -1) + (image[i - 1][j].rgbtRed * -2);//
                fGy_sum_blue = (image[i - 1][j - 1].rgbtBlue * -1) + (image[i - 1][j].rgbtBlue * -2);//
                fGy_sum_green = (image[i - 1][j - 1].rgbtGreen * -1) + (image[i - 1][j].rgbtGreen * -2);//

            }
            else if (i == 0 && (j != 0 || j != width - 1))
            {
                fGx_sum_red = (image[i][j - 1].rgbtRed * -2) + (image[i][j + 1].rgbtRed * 2) +
                              (image[i + 1][j - 1].rgbtRed * -1) + (image[i + 1][j + 1].rgbtRed * 1);
                fGx_sum_blue = (image[i][j - 1].rgbtBlue * -2) + (image[i][j + 1].rgbtBlue * 2) +
                               (image[i + 1][j - 1].rgbtBlue * -1) +  (image[i + 1][j + 1].rgbtBlue * 1);
                fGx_sum_green = (image[i][j - 1].rgbtGreen * -2) + (image[i][j + 1].rgbtGreen * 2) +
                                (image[i + 1][j - 1].rgbtGreen * -1) + (image[i + 1][j + 1].rgbtGreen * 1);//
                fGy_sum_red = (image[i + 1][j - 1].rgbtRed * 1) + (image[i + 1][j].rgbtRed * 2) + (image[i + 1][j + 1].rgbtRed * 1);//
                fGy_sum_blue = (image[i + 1][j - 1].rgbtBlue * 1) + (image[i + 1][j].rgbtBlue * 2) + (image[i + 1][j + 1].rgbtBlue * 1);//
                fGy_sum_green = (image[i + 1][j - 1].rgbtGreen * 1) + (image[i + 1][j].rgbtGreen * 2) + (image[i + 1][j + 1].rgbtGreen * 1);//
            }
            else if (i == height - 1 && (j != 0 || j != width - 1))
            {
                fGx_sum_red = (image[i - 1][j - 1].rgbtRed * -1) + (image[i - 1][j + 1].rgbtRed * 1) +
                              (image[i][j - 1].rgbtRed * -2) + (image[i][j + 1].rgbtRed * 2);
                fGx_sum_blue = (image[i - 1][j - 1].rgbtBlue * -1) + (image[i - 1][j + 1].rgbtBlue * 1) +
                               (image[i][j - 1].rgbtBlue * -2) + (image[i][j + 1].rgbtBlue * 2);
                fGx_sum_green = (image[i - 1][j - 1].rgbtGreen * -1) + (image[i - 1][j + 1].rgbtGreen * 1) +
                                (image[i][j - 1].rgbtGreen * -2) + (image[i][j + 1].rgbtGreen * 2);//
                fGy_sum_red = (image[i - 1][j - 1].rgbtRed * -1) + (image[i - 1][j].rgbtRed * -2) + (image[i - 1][j + 1].rgbtRed * -1);//
                fGy_sum_blue = (image[i - 1][j - 1].rgbtBlue * -1) + (image[i - 1][j].rgbtBlue * -2) + (image[i - 1][j + 1].rgbtBlue * -1);//
                fGy_sum_green = (image[i - 1][j - 1].rgbtGreen * -1) + (image[i - 1][j].rgbtGreen * -2) + (image[i - 1][j + 1].rgbtGreen * -1);//
            }
            else if (j == 0 && (i != 0 || i != height - 1))
            {
                fGx_sum_red = (image[i - 1][j + 1].rgbtRed * 1) + (image[i][j + 1].rgbtRed * 2) + (image[i + 1][j + 1].rgbtRed * 1);
                fGx_sum_blue = (image[i - 1][j + 1].rgbtBlue * 1) + (image[i][j + 1].rgbtBlue * 2) + (image[i + 1][j + 1].rgbtBlue * 1);
                fGx_sum_green = (image[i - 1][j + 1].rgbtGreen * 1) + (image[i][j + 1].rgbtGreen * 2) + (image[i + 1][j + 1].rgbtGreen * 1);//
                fGy_sum_red = (image[i - 1][j].rgbtRed * -2) + (image[i - 1][j + 1].rgbtRed * -1) +
                              (image[i + 1][j].rgbtRed * 2) + (image[i + 1][j + 1].rgbtRed * 1);//
                fGy_sum_blue = (image[i - 1][j].rgbtBlue * -2) + (image[i - 1][j + 1].rgbtBlue * -1) +
                               (image[i + 1][j].rgbtBlue * 2) + (image[i + 1][j + 1].rgbtBlue * 1);//
                fGy_sum_green = (image[i - 1][j].rgbtGreen * -2) + (image[i - 1][j + 1].rgbtGreen * -1) +
                                (image[i + 1][j].rgbtGreen * 2) + (image[i + 1][j + 1].rgbtGreen * 1);//
            }
            else if (j == width - 1 && (i != 0 || i != height - 1))
            {
                fGx_sum_red = (image[i - 1][j - 1].rgbtRed * -1) + (image[i][j - 1].rgbtRed * -2) + (image[i + 1][j - 1].rgbtRed * -1);
                fGx_sum_blue = (image[i - 1][j - 1].rgbtBlue * -1) + (image[i][j - 1].rgbtBlue * -2) + (image[i + 1][j - 1].rgbtBlue * -1);
                fGx_sum_green = (image[i - 1][j - 1].rgbtGreen * -1) + (image[i][j - 1].rgbtGreen * -2) + (image[i + 1][j - 1].rgbtGreen * -1);//
                fGy_sum_red = (image[i - 1][j - 1].rgbtRed * -1) + (image[i - 1][j].rgbtRed * -2) +
                              (image[i + 1][j - 1].rgbtRed * 1) + (image[i + 1][j].rgbtRed * 2);//
                fGy_sum_blue = (image[i - 1][j - 1].rgbtBlue * -1) + (image[i - 1][j].rgbtBlue * -2) +
                               (image[i + 1][j - 1].rgbtBlue * 1) + (image[i + 1][j].rgbtBlue * 2);//
                fGy_sum_green = (image[i - 1][j - 1].rgbtGreen * -1) + (image[i - 1][j].rgbtGreen * -2) +
                                (image[i + 1][j - 1].rgbtGreen * 1) + (image[i + 1][j].rgbtGreen * 2);//
            }
            else
            {
                fGx_sum_red = (image[i - 1][j - 1].rgbtRed * -1) + (image[i - 1][j + 1].rgbtRed * 1) +
                              (image[i][j - 1].rgbtRed * -2) + (image[i][j + 1].rgbtRed * 2) +
                              (image[i + 1][j - 1].rgbtRed * -1) + (image[i + 1][j + 1].rgbtRed * 1);
                fGx_sum_blue = (image[i - 1][j - 1].rgbtBlue * -1) + (image[i - 1][j + 1].rgbtBlue * 1) +
                               (image[i][j - 1].rgbtBlue * -2) + (image[i][j + 1].rgbtBlue * 2) +
                               (image[i + 1][j - 1].rgbtBlue * -1) + (image[i + 1][j + 1].rgbtBlue * 1);
                fGx_sum_green = (image[i - 1][j - 1].rgbtGreen * -1) + (image[i - 1][j + 1].rgbtGreen * 1) +
                                (image[i][j - 1].rgbtGreen * -2) + (image[i][j + 1].rgbtGreen * 2) +
                                (image[i + 1][j - 1].rgbtGreen * -1) + (image[i + 1][j + 1].rgbtGreen * 1);//
                fGy_sum_red = (image[i - 1][j - 1].rgbtRed * -1) + (image[i - 1][j].rgbtRed * -2) + (image[i - 1][j + 1].rgbtRed * -1) +
                              (image[i + 1][j - 1].rgbtRed * 1) + (image[i + 1][j].rgbtRed * 2) + (image[i + 1][j + 1].rgbtRed * 1);//
                fGy_sum_blue = (image[i - 1][j - 1].rgbtBlue * -1) + (image[i - 1][j].rgbtBlue * -2) + (image[i - 1][j + 1].rgbtBlue * -1) +
                               (image[i + 1][j - 1].rgbtBlue * 1) + (image[i + 1][j].rgbtBlue * 2) + (image[i + 1][j + 1].rgbtBlue * 1);//
                fGy_sum_green = (image[i - 1][j - 1].rgbtGreen * -1) + (image[i - 1][j].rgbtGreen * -2) + (image[i - 1][j + 1].rgbtGreen * -1) +
                                (image[i + 1][j - 1].rgbtGreen * 1) + (image[i + 1][j].rgbtGreen * 2) + (image[i + 1][j + 1].rgbtGreen * 1);//
            }


            printf("red_sum is %i and %i, blue_sum is %i and %i and green_sum is %i and %i\n", fGx_sum_red, fGy_sum_red, fGx_sum_blue, fGy_sum_blue,
                    fGx_sum_green, fGy_sum_green);
            //calculating sum of Gx and Gy for each color
            red_sum = (fGx_sum_red * fGx_sum_red) + (fGy_sum_red * fGy_sum_red);
            blue_sum = (fGx_sum_blue * fGx_sum_blue) + (fGy_sum_blue * fGy_sum_blue);
            green_sum = (fGx_sum_green * fGx_sum_green) + (fGy_sum_green * fGy_sum_green);
            printf("red_sum is %i, blue_sum is %i and green_sum is %i\n", red_sum, blue_sum, green_sum);

            red_avg = sqrt(red_sum);
            blue_avg = sqrt(blue_sum);
            green_avg = sqrt(green_sum);
            printf("red_avg is %i, blue_avg is %i and green_avg is %i\n", red_avg, blue_avg, green_avg);

            //updating colors values
            image[i][j].rgbtRed = red_avg > 255 ? 255 : red_avg;
            image[i][j].rgbtBlue = blue_avg > 255 ? 255 : blue_avg;
            image[i][j].rgbtGreen = green_avg > 255 ? 255 : green_avg;
            printf("image[i][j].rgbtRed is %i, image[i][j].rgbtBlue is %i and image[i][j].rgbtGreen is %i, i and j are %i and %i \n",
            image[i][j].rgbtRed, image[i][j].rgbtBlue, image[i][j].rgbtGreen, i, j);
            //continue;
        }
    }
    return;
}

Solution

When i == 0 you try to deference image[i - 1][j] in this block of code. This is out of bound access to the image array and trigger a segfault for me:

} else if (i == 0 && (j != 0 || j != width - 1)) {
   fGx_sum_red = (image[i - 1][j].rgbtRed * 0) ...

By analogy (in other words I have no idea if that is correct algorithm) replace i - 1 with i in that block.

Answered By - Allan Wind

Answer Checked By - Timothy Miller (PHPFixing Admin)