opencv格式转换

Question

opencv C++，可以转化yuv422sp或yuv422p数据到rgb嘛，找不到这个转换格式呀，有懂opencv的吗

Answer 1

#include <iostream>
#include <opencv2/opencv.hpp>
#include "pencv.h"

using namespace std;
using namespace cv;
using namespace pencv;

int main() {
    // 读取YUV422SP或YUV422P数据
    uchar y_plane[640*480], u_plane[640*480], v_plane[640*480];
    FILE* f = fopen("input.yuv", "rb");
    fread(y_plane, 1, sizeof(uchar)*640*480, f);
    fclose(f);
    f = fopen("input.yuv", "rb");
    fread(u_plane, 1, sizeof(uchar)*640*480, f);
    fclose(f);
    f = fopen("input.yuv", "rb");
    fread(v_plane, 1, sizeof(uchar)*640*480, f);
    fclose(f);

    // 将YUV422SP数据转换为RGB数据
    int width = 640, height = 480;
    int y_size = width * height;
    int u_size = width >> 1, v_size = height >> 1;
    uint8_t* y_rgb = new uint8_t[y_size * 3];
    uint8_t* u_rgb = new uint8_t[u_size * 3];
    uint8_t* v_rgb = new uint8_t[v_size * 3];
    memset(y_rgb, 0, y_size * 3);
    memset(u_rgb, 0, u_size * 3);
    memset(v_rgb, 0, v_size * 3);
    int y_p = 0, u_p = 0, v_p = 0;
    for (int i = 0; i < y_size; i++) {
        y_rgb[i] = y_plane[y_p++];
        if (i % (width >> 1) == 0) {
            u_p = 0;
            v_p = i / (width >> 1);
        } else if (i % (width >> 1) == (width >> 1)) {
            u_p++;
            v_p++;
        }
        if (i % (height >> 1) == 0) {
            u_rgb[(width >> 1) * v_p + u_p] = u_plane[u_p++];
            v_rgb[(width >> 1) * v_p + u_p] = v_plane[v_p++];
        } else if (i % (height >> 1) == (height >> 1)) {
            u_rgb[(width >> 1) * v_p + u_p] += u_plane[u_p++];
            v_rgb[(width >> 1) * v_p + u_p] += v_plane[v_p++];
        }
    }

    // 将RGB数据写入文件输出
    FILE* f = fopen("output.jpg", "wb");
    fwrite(y_rgb, sizeof(uint8_t), y_size * 3, f);
    fwrite(u_rgb, sizeof(uint8_t), u_size * 3, f);
    fwrite(v_rgb, sizeof(uint8