I have written the following code for blur .
// Blur image
void blur(int height, int width, RGBTRIPLE image[height][width]) { for ( int h=0 ; h
if(h==0 )
{
if(w==0)
{
image[h][w].rgbtBlue=round((image[h][w].rgbtBlue+ image[h][w+1].rgbtBlue+image[h+1][w].rgbtBlue+image[h+1][w+1].rgbtBlue)/4);
image[h][w].rgbtGreen = round((image[h][w].rgbtGreen+ image[h][w+1].rgbtGreen+image[h+1][w].rgbtGreen+image[h+1][w+1].rgbtGreen)/4);
image[h][w].rgbtRed = round((image[h][w].rgbtRed+ image[h][w+1].rgbtRed+image[h+1][w].rgbtRed+image[h+1][w+1].rgbtRed)/4);
}
else if(w==width-1)
{
image[h][w].rgbtBlue=round((image[h][w].rgbtBlue+ image[h][w-1].rgbtBlue+image[h+1][w].rgbtBlue+image[h+1][w-1].rgbtBlue)/4);
image[h][w].rgbtGreen = round((image[h][w].rgbtGreen+ image[h][w-1].rgbtGreen+image[h+1][w].rgbtGreen+image[h+1][w-1].rgbtGreen)/4);
image[h][w].rgbtRed = round((image[h][w].rgbtRed+ image[h][w-1].rgbtRed+image[h+1][w].rgbtRed+image[h+1][w-1].rgbtRed)/4);
}
else if (w!=0 && w!=width-1)
{
image[h][w].rgbtRed = round((image[h][w].rgbtRed+ image[h][w+1].rgbtRed+image[h+1][w].rgbtRed+image[h+1][w+1].rgbtRed+image[h][w-1].rgbtRed+image[h+1][w-1].rgbtRed)/6);
image[h][w].rgbtGreen = round((image[h][w].rgbtGreen+ image[h][w+1].rgbtGreen+image[h+1][w].rgbtGreen+image[h+1][w+1].rgbtGreen+image[h][w-1].rgbtGreen+image[h+1][w-1].rgbtGreen)/6);
image[h][w].rgbtBlue = round((image[h][w].rgbtBlue+ image[h][w+1].rgbtBlue+image[h+1][w].rgbtBlue+image[h+1][w+1].rgbtBlue+image[h][w-1].rgbtBlue+image[h+1][w-1].rgbtBlue)/6);
}
}
else if (0<h<height-1)
{
if (w==0)
{
image[h][w].rgbtRed = round((image[h][w].rgbtRed+ image[h][w+1].rgbtRed+image[h+1][w].rgbtRed+image[h+1][w+1].rgbtRed+image[h-1][w].rgbtRed+image[h-1][w+1].rgbtRed)/6);
image[h][w].rgbtGreen = round((image[h][w].rgbtGreen+ image[h][w+1].rgbtGreen+image[h+1][w].rgbtGreen+image[h+1][w+1].rgbtGreen+image[h-1][w].rgbtGreen+image[h-1][w+1].rgbtGreen)/6);
image[h][w].rgbtBlue = round((image[h][w].rgbtBlue+ image[h][w+1].rgbtBlue+image[h+1][w].rgbtBlue+image[h+1][w+1].rgbtBlue+image[h-1][w].rgbtBlue+image[h-1][w+1].rgbtBlue)/6);
}
if (w==width-1)
{
image[h][w].rgbtRed = round((image[h][w].rgbtRed+ image[h][w-1].rgbtRed+image[h+1][w].rgbtRed+image[h+1][w-1].rgbtRed+image[h-1][w].rgbtRed+image[h-1][w-1].rgbtRed)/6);
image[h][w].rgbtGreen = round((image[h][w].rgbtGreen+ image[h][w-1].rgbtGreen+image[h+1][w].rgbtGreen+image[h+1][w-1].rgbtGreen+image[h-1][w].rgbtGreen+image[h-1][w-1].rgbtGreen)/6);
image[h][w].rgbtBlue = round((image[h][w].rgbtBlue+ image[h][w-1].rgbtBlue+image[h+1][w].rgbtBlue+image[h+1][w-1].rgbtBlue+image[h-1][w].rgbtBlue+image[h-1][w-1].rgbtBlue)/6);
}
//These are lines giving problem from here :
else if (0<w<width-1)
{ //line 136 ,137,138
image[h][w].rgbtRed = round((image[h-1][w].rgbtRed+ image[h-1][w-1].rgbtRed+ image[h-1][w+1].rgbtRed+ image[h][w-1].rgbtRed+ image[h][w].rgbtRed+ image[h][w+1].rgbtRed+ image[h+1][w].rgbtRed+image[h+1][w-1].rgbtRed+image[h+1][w+1].rgbtRed)/9);
image[h][w].rgbtGreen = round((image[h-1][w].rgbtGreen+ image[h-1][w-1].rgbtGreen+ image[h-1][w+1].rgbtGreen+ image[h][w-1].rgbtGreen+ image[h][w].rgbtGreen+ image[h][w+1].rgbtGreen+ image[h+1][w].rgbtGreen+image[h+1][w-1].rgbtGreen+image[h+1][w+1].rgbtGreen)/9);
image[h][w].rgbtBlue = round((image[h-1][w].rgbtBlue+ image[h-1][w-1].rgbtBlue+ image[h-1][w+1].rgbtBlue+ image[h][w-1].rgbtBlue+ image[h][w].rgbtBlue+ image[h][w+1].rgbtBlue+ image[h+1][w].rgbtBlue+image[h+1][w-1].rgbtBlue+image[h+1][w+1].rgbtBlue)/9);
}
}
//from here its all fine
else if (h==height-1 )
{
if (w==0)
{
image[h][w].rgbtBlue=round((image[h][w].rgbtBlue+ image[h][w+1].rgbtBlue+image[h-1][w].rgbtBlue+image[h-1][w+1].rgbtBlue)/4);
image[h][w].rgbtGreen = round((image[h][w].rgbtGreen+ image[h][w+1].rgbtGreen+image[h-1][w].rgbtGreen+image[h-1][w+1].rgbtGreen)/4);
image[h][w].rgbtRed = round((image[h][w].rgbtRed+ image[h][w+1].rgbtRed+image[h-1][w].rgbtRed+image[h-1][w+1].rgbtRed)/4);
}
else if (w==width-1)
{
image[h][w].rgbtBlue=round((image[h][w].rgbtBlue+ image[h][w-1].rgbtBlue+image[h-1][w].rgbtBlue+image[h-1][w-1].rgbtBlue)/4);
image[h][w].rgbtGreen = round((image[h][w].rgbtGreen+ image[h][w-1].rgbtGreen+image[h-1][w].rgbtGreen+image[h-1][w-1].rgbtGreen)/4);
image[h][w].rgbtRed = round((image[h][w].rgbtRed+ image[h][w-1].rgbtRed+image[h-1][w].rgbtRed+image[h-1][w-1].rgbtRed)/4);
}
else if (w!=0 && w!=width-1)
{
image[h][w].rgbtRed = round((image[h][w].rgbtRed+ image[h][w+1].rgbtRed+image[h-1][w].rgbtRed+image[h-1][w+1].rgbtRed+image[h][w-1].rgbtRed+image[h-1][w-1].rgbtRed)/6);
image[h][w].rgbtGreen = round((image[h][w].rgbtGreen+ image[h][w+1].rgbtGreen+image[h-1][w].rgbtGreen+image[h-1][w+1].rgbtGreen+image[h][w-1].rgbtGreen+image[h-1][w-1].rgbtGreen)/6);
image[h][w].rgbtBlue = round((image[h][w].rgbtBlue+ image[h][w+1].rgbtBlue+image[h-1][w].rgbtBlue+image[h-1][w+1].rgbtBlue+image[h][w-1].rgbtBlue+image[h-1][w-1].rgbtBlue)/6);
}
}
}
}
return;
}
It compiles fine and does not give any error but when I attempt to get a blur image with this code . It shows following error .
helpers.c:136:77: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
helpers.c:136:127: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
helpers.c:136:216: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
helpers.c:137:81: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
helpers.c:137:135: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
helpers.c:137:232: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
helpers.c:138:79: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
helpers.c:138:131: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
helpers.c:138:224: runtime error: index -1 out of bounds for type 'RGBTRIPLE [width]'
I want to know what is wrong with that code . If anyone can help me . It would be very appreciable .
