opencv中的merge函数

void merge(const Mat* mv, size_t count, OutputArray dst);

void merge(const vector& mv, OutputArray dst );

std::vector<Mat> channels;
Mat aChannels[3];

split(src, channels);              //分离到数组
split(src, aChannels);             //分离到vector对象

//do something
//xxxx

merge(channels, mergeImg);
merge(aChannels, 3, mergeImg);