Convert RGB color image to Grayscale using FastCV

fastcv_rgb_to_gray.cpp

#include "fastcv.h"
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main()
{
    // OpenCV - Read file
    Mat imageSrc = imread("imagefile.jpg", IMREAD_COLOR);

    // FastCV - Source data preparation
    const uint8_t* __restrict src = imageSrc.data;
    uint32_t srcWidth = 640;
    uint32_t srcHeight = 480;
    uint32_t srcStride = srcWidth * 3;
    uint8_t* __restrict dst = new uint8_t[srcWidth * srcHeight];
    uint32_t dstStride = srcWidth;

    // FastCV - Initialization (Not required)
    fcvOperationMode mode = FASTCV_OP_CPU_PERFORMANCE;
    fcvSetOperationMode(mode);

    // FastCV - RGB2GRAY
    fcvColorRGB888ToGrayu8(src, srcWidth, srcHeight, srcStride, dst, dstStride);

    // FastCV - De-Initialization (Not required)
    fcvCleanUp();

    // OpenCV - Destination data preparation
    Mat imageDst = Mat(srcHeight, srcWidth, CV_8U, dst);

    // OpenCV - Display source image
    imshow("Source Image", imageSrc);
    waitKey(0);

    // OpenCV - Display destination image
    imshow("Destination Image", imageDst);
    waitKey(0);

    return 0;
}