Help me solve C++ code

I'm looking for a very experienced C++ developer. I'm trying to learn multithreading basics for image processing in C++. I come from a different API background where I've done this often and I'm trying to get my code ported to C++ using the std::thread function. This is my current pseudocode: static const int num_threads=4; void FilterImage (int x1, int x2, int x3, int threadNr) { // output defined... // Every thread calculates a different line for (int y = 0 + threadNr; y < output->height; y += num_threads) { // Horizontal lines for (int x = 0; x < output->width; x++) { // Do Stuff... } } } int main() { std::thread t[num_threads]; int param1, param2, param3; int i; for (i = 0; i < num_threads; i++) t[i] = std::thread(FilterImage, param1, param2, param3, i); for (i = 0; i < num_threads; i++) t[i].join; } However, I cannot get this to work. I cannot pass i (the thread Id) as a parameter to my function. Visual Studio won't allow me and reports an error. I would like to hire someone to guide me through solving this and helping me understand why. I am quite new to C++. We would chat over the website chat and I would get your assistance that way. I would like to retain this method for multitasking since it is a port from my other API. My expectation is to have each thread tackle an image line. I will most likely have other issues I will need help on so I am looking for someone to have on-hand for other problems.