直接上代码，初步验证测试正确，数组形式与opencv的存储方式一致为BGR。
cv::Mat TransBufferToMat(unsigned char* pBuffer, int nWidth, int nHeight, int nBandNum, int nBPB = 1)
{
cv::Mat mDst;
if (nBandNum == 4)
{
if (nBPB == 1)
{
mDst = cv::Mat::zeros(cv::Size(nWidth, nHeight), CV_8UC4);
}
else if (nBPB == 2)
{
mDst = cv::Mat::zeros(cv::Size(nWidth, nHeight), CV_16UC4);
}
}
else if (nBandNum == 3)
{
if (nBPB == 1)
{
mDst = cv::Mat::zeros(cv::Size(nWidth, nHeight), CV_8UC3);
}
else if (nBPB == 2)
{
mDst = cv::Mat::zeros(cv::Size(nWidth, nHeight), CV_16UC3);
}
}
else if (nBandNum == 1)
{
if (nBPB == 1)
{
mDst = cv::Mat::zeros(cv::Size(nWidth, nHeight), CV_8UC1);
}
else if (nBPB == 2)
{
mDst = cv::Mat::zeros(cv::Size(nWidth, nHeight), CV_16UC1);
}
}
for (int j = 0; j < nHeight; ++j)
{
unsigned char* data = mDst.ptr(j);
unsigned char* pSubBuffer = pBuffer + (nHeight - 1 - j) * nWidth * nBandNum * nBPB;
memcpy(data, pSubBuffer, nWidth * nBandNum * nBPB);
}
if (nBandNum == 1)
{
cv::cvtColor(mDst, mDst, CV_GRAY2BGR);
}
else if (nBandNum == 3)
{
cv::cvtColor(mDst, mDst, CV_RGB2BGR);
}
else if (nBandNum == 4)
{
cv::cvtColor(mDst, mDst, CV_RGBA2BGR);
}
return mDst;
}
int TransMatToBuffer(cv::Mat mSrc, unsigned char** ppBuffer, int& nWidth, int& nHeight, int& nBandNum, int& nBPB)
{
if (*ppBuffer)
{
delete[] * ppBuffer;
*ppBuffer = nullptr;
}
nWidth = mSrc.cols;
//nWidth = ((nWidth + 3) / 4) * 4;
nHeight = mSrc.rows;
nBandNum = mSrc.channels();
nBPB = (mSrc.depth() >> 1) + 1;
size_t nMemSize = nWidth * nHeight * nBandNum * nBPB;
//这样可以改变外部*pBuffer的值
*ppBuffer = new uchar[nMemSize];
memset(*ppBuffer, 0, nMemSize);
uchar* pT = *ppBuffer;
for (int j = 0; j < nHeight; ++j)
{
unsigned char* data = mSrc.ptr(j);
unsigned char* pSubBuffer = *ppBuffer + (j)* nWidth * nBandNum * nBPB;
memcpy(pSubBuffer, data, nWidth * nBandNum * nBPB);
}
return 0;
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