Write a CPP program? · Define and initialize a 3D array to keep RGB pixels struc

Question

Write a CPP program?

· Define and initialize a 3D array to keep RGB pixels structured.

· Read pixels from three different files into your 3D array (you read the data from file number-by-number).

· Find average values for each layer R (red), G (green), B (blue) (Array[i][j][0] + Array[i][j][1]  + Array[i][j][2] ) /3, which is called intensity of a pixel. In the notation of Array[i][j][c], c is the color band, i anc j are location of the pixel.

· Find maximum and minimum intensity pixels of the image. Also, print out those pixel addresses of min an max values. Intensity is average of R, G, and B values. In case of multiple minimum and maximum values, you should show all of the pixel locations.

· List address (x, y location) of pixels meeting if pixel's Red value is less than pixel's Blue value.

How do I upload the test files to this question?

Explanation / Answer

Complete Program:

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main()
{
const int SIZE = 3;

int RGB[SIZE][SIZE][SIZE];
double averages[SIZE * SIZE];

ifstream red("RedPixelsInfo.txt");
ifstream green("GreenPixelsInfo.txt");
ifstream blue("BluePixelsInfo.txt");

if(!red || !green || !blue)
{
  cout << "Unable to open the data files." << endl;
  system("pause");
  exit(EXIT_FAILURE);
}

for(int i = 0; i < SIZE; i++)
{
  for(int j = 0; j < SIZE; j++)
  {
   for(int c = 0; c < SIZE; c++)
   {
    if(red && green && blue)
    {
     if(c == 0)
      red >> RGB[i][j][c];
     else if(c == 1)
      green >> RGB[i][j][c];
     else
      blue >> RGB[i][j][c];
    }
   }
  }
}
  
red.close();
green.close();
blue.close();

int k = 0;
for(int i = 0; i < SIZE; i++)
{
  for(int j = 0; j < SIZE; j++)
  {
   double total = RGB[i][j][0] + RGB[i][j][1] + RGB[i][j][2];
   averages[k] = total / 3.0;
   k++;
  }
}

double minimum = averages[0];
double maximum = averages[0];

for(int i = 1; i < k; i++)
{
  if(averages[i] < minimum)
   minimum = averages[i];

  if(averages[i] > maximum)
   maximum = averages[i];
}

cout << "R G B Intensity" << endl;
cout << "----------------------------------" << endl;
k = 0;
for(int i = 0; i < SIZE; i++)
{
  for(int j = 0; j < SIZE; j++)
  {
   for(int c = 0; c < SIZE; c++)
   {
    cout << RGB[i][j][c] << " ";
   }
   cout << averages[k] << endl;
   k++;
  }
}

cout << " The minimum intensity " << minimum << " is at the (x, y) location(s):" << endl;
for(int i = 0; i < SIZE; i++)
{
  for(int j = 0; j < SIZE; j++)
  {
   double avg = (RGB[i][j][0] + RGB[i][j][1] + RGB[i][j][2]) / 3.0;

   if(avg == minimum)
    cout << "(" << i << ", " << j << ")" << endl;
  }
}

cout << " The maximum intensity " << maximum << " is at the (x, y) location(s):" << endl;
for(int i = 0; i < SIZE; i++)
{
  for(int j = 0; j < SIZE; j++)
  {
   double avg = (RGB[i][j][0] + RGB[i][j][1] + RGB[i][j][2]) / 3.0;

   if(avg == maximum)
    cout << "(" << i << ", " << j << ")" << endl;
  }
}

cout << endl;
system("pause");
return 0;
}

Sample Output:

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