PSET 4 Filter(Less) help with Blur

Question

The code visually seems to work (the images look blurry on the output) when I run it with all 4 of the pre loaded images, but with Check50 everything is marked as incorrect and I can't figure out why.

    void blur(int height, int width, RGBTRIPLE image[height][width])
{
    //Create new array
    RGBTRIPLE new[height][width];

    //Copy image to new
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            new[i][j] = image[i][j];
        }
    }

    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            //Create counter and int to store each of the neighbour colors
            int counter = 0;
            int tempRed = 0;
            int tempGreen = 0;
            int tempBlue = 0;

            //Check for the neighbour pixels
            for (int l = -1; l < 2; l++)
            {
                for (int m = -1; m < 2; m++)
                {
                    //If they are bigger that 0 and smaller than height or width they exist
                    if (i+l > 0 && i+l < height && j+m > 0 && j+m < width)
                    {
                    //Store the value in the temp color int and increase the counter
                    tempRed += new[i+l][j+m].rgbtRed;
                    tempGreen += new[i+l][j+m].rgbtGreen;
                    tempBlue += new[i+l][j+m].rgbtBlue;
                    counter++;
                    }
                }
            }
            //Average color value of neighbour pixels and assign it to image
            image[i][j].rgbtRed = round(tempRed/counter);
            image[i][j].rgbtGreen = round(tempGreen/counter);
            image[i][j].rgbtBlue = round(tempBlue/counter);
        }
    }
    return;
}

ERROR

:( blur correctly filters middle pixel

expected "127 140 149\n", not "177 192 201\n"

:( blur correctly filters pixel on edge

expected "80 95 105\n", not "125 145 155\n"

:( blur correctly filters pixel in corner

expected "70 85 95\n", not "120 140 150\n"

:( blur correctly filters 3x3 image

expected "70 85 95\n80 9...", not "120 140 150\n1..."

:( blur correctly filters 4x4 image

expected "70 85 95\n80 9...", not "120 140 150\n1..."

Thanks for your help!

Answer 1

>= 0, not > 0. 0 is a valid index.

Also, you might have rounding issues because you are doing integer division.