Can't read large text files in C - c

Question

I'm working on image convolution for a 416 * 416 color image with a 3 * 3 * 3 * 16 kernal weights (where kernal width - 3, kernal height - 3, filter channels - 3, number of filters - 16). I'm trying to do this in C, but first I need to read the image from the text file and store it in the memory before working with the convolution function. But I think it seems that C doesn't allow me to write 416 * 416 * 3 size string values into an array. I'm actually a newbie to C, so I'm trying to figure out what would be the best approach I should obey in this ?
Below you can see the code.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main()
{
char line[255];
int fileSize = 416 * 416 * 3;
char image[416 * 416 * 3][255];
FILE *fpointer_1 = fopen("dog_text_image.txt", "r");
for (int i = 0; i < fileSize; i++)
{
fgets(line, 255, fpointer_1);
strcpy(image[i], line);
};
fclose(fpointer_1);
printf("1st value : %s\n", image[0]);
printf("2nd value : %s\n", image[1]);
printf("3rd value : %s\n", image[3]);
return 0;
}

Answer 1

You can alternatively use pointer to array (instead of pointer to pointer) to allocate the entire matrix with a single malloc, and deallocate it with a single free:
#include <stdio.h>
#include <stdlib.h>
int main()
{
/*Pointer to array of length 255*/
char (*image)[255];
/*One malloc to allocate memory*/
if(!(image = malloc(416 * 416 * 3 * sizeof *image))){
perror("Bad allocation!");
return EXIT_FAILURE;
}
/* Do stuff with the matrix*/
image[400][100] = 'a';
/*One free to deallocate memory*/
if(image){
free(image);
}
return 0;
}

Answer 2

It's likely you are getting a stack overflow, try allocating the memory to the heap, something like replacing
char image[416 * 416 * 3][255];
with
//...
char **image;
if(!(image = malloc((fileSize) * sizeof(*image)))){
perror("Bad allocation!");
return EXIT_FAILURE;
}
for(int i = 0; i < fileSize; i++) {
if(!(image[i] = malloc(255))){
perror("Bad allcation!");
return EXIT_FAILURE;
}
}
//...
To free the memory it's the other way around:
for (int i = 0; i < fileSize; i++){
if(image[i])
free(image[i]);
}
if(image)
free(image);
Also, in the code
//...
fgets(line, 255, fpointer_1);
strcpy(image[i], line;
//...
strcpy is really unnecessary you can read directly to image[i] in fgets.
It's possible you can solve the issue with the help of #CraigEstey's comments, try that first.