How to Grayscale Image in C++ - Code Snippet

// Task: Grayscale Image
// Language: C++

void grayscaleImage() {
    // Implementation for Grayscale Image
    auto result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Grayscale Image
    std::cout << "Done" << std::endl;
}