CS50x Blur Function - c

Question

I am currently working on the blur function in PSET4 for filter-more, and I am struggling to find the bug in my code. The blur function seems to correctly filter the middle pixel and I would assume other pixels that are not on the edges, but is incorrectly filtering those on the corners and edges. Any nudges in the right direction would be greatly appreciated.
// Blur image
void blur(int height, int width, RGBTRIPLE image[height][width])
{
// Copy to store filtered image into
RGBTRIPLE temp[height][width];
int red_total = 0, blue_total = 0, green_total = 0;
int red_average = 0, blue_average = 0, green_average = 0;
// Goes through each pixel [i][j]
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
// Loops through surrounding 3x3 grid and records the average of all of them
for (int h = -1; h < 2; h++)
{
// Checks if the current row is within the image array
if (i + h >= 0 && i + h < height)
{
for (int k = -1; k < 2; k++)
{
// Checks if current column is within image array
if (j + k >= 0 && j + k < width)
{
red_total = red_total + image[i + h][j + k].rgbtRed;
blue_total = blue_total + image[i + h][j + k].rgbtBlue;
green_total = green_total + image[i + h][j + k].rgbtGreen;
}
else continue;
}
}
else continue;
}
// Averages and reassigns pixel value
red_average = round(red_total / 9.0);
blue_average = round(blue_total / 9.0);
green_average = round(green_total / 9.0);
temp[i][j].rgbtBlue = blue_average;
temp[i][j].rgbtRed = red_average;
temp[i][j].rgbtGreen = green_average;
// Resets counter variables
red_total = green_total = blue_total = 0;
red_average = blue_average = green_average = 0;
}
}
// Makes image (original) array equal to the filtered image
for (int x = 0; x < height; x++)
{
for(int y = 0; y < width; y++)
{
image[x][y] = temp[x][y];
}
}
return;
}