Flip image horizontally and vertically

ImageOperator.cpp

void ImageOperator::flip_h(const unsigned char* input,
                           const int width,
                           const int height,
                           const int channel,
                           unsigned char*& output){
  
    for (int row = 0; row < height; ++row) {
        for (int col = 0; col < width * channel; col += 1) {
            output[row*width+col]=input[(height-row)*width+col];

        }
    }
}

void ImageOperator::flip_v(const unsigned char* input,
                           const int width,
                           const int height,
                           const int channel,
                           unsigned char*& output){
  
    for (int row = 0; row < height; ++row) {
        for (int col = 0; col < width * channel; col += 1) {
            output[row*width+col]=input[row*width+(width-col)];

        }
    }
}