我试图计算仅由一行组成的矩阵的直方图。我使用OpenCV3.1在VS2015中编写了这段代码:
//Create matrix stromal pop
cv::Mat stromalHistogram(1, i_stromalIID.size(), CV_32F);
float * ref_ptr = stromalHistogram.ptr<float>(0);
std::copy(i_stromalIID.begin(),
i_stromalIID.end(),
stdext::checked_array_iterator<float *>(ref_ptr, stromalHistogram.cols));
#ifdef _DEBUG
std::cout << "Matrix =" << std::endl << stromalHistogram << std::endl;
#endif
// calculate histogram for stromal pop
auto itRangesRef = std::minmax_element(i_stromalIID.begin(), i_stromalIID.end());
float stromalRanges[] = {*itRangesRef.first, *itRangesRef.second};
const float * rangesRef[] = {stromalRanges};
const int channel = 0;
const int histSize = 256;
std::vector<float> hist_out;
cv::calcHist(
&stromalHistogram, 1, &channel, cv::Mat(), hist_out, 1, &histSize, rangesRef);
i_stromalIID
是从外部传递的std::vector<double>
。 cv::Mat stromalHistogram
被正确填充,因为当我打印它时,一切都如我所料(1行,1203列)。但是当程序运行cv::calcHist
时,我收到以下错误:
OpenCV错误:断言失败(d == 2&amp;&amp;(sizes [0] == 1 || sizes [1] == 1 || size [0] * sizes [1] == 0))在cv :: _ OutputArray :: create中,文件D:\ Development \ lib \ OpenCV3.1 \ opencv-master \ modules \ core \ src \ matrix.cpp, 第2363行
我尝试调试OpenCV代码,错误在cv::calcHist
时尝试执行:
void cv::calcHist( const Mat* images, int nimages, const int* channels,
InputArray _mask, OutputArray _hist, int dims, const int* histSize,
const float** ranges, bool uniform, bool accumulate )
{
.....
.....
_hist.create(dims, histSize, CV_32F);
}
然后调用matrix.cpp
内部:
void _OutputArray::create(int d, const int* sizes, int mtype, int i,
bool allowTransposed, int fixedDepthMask) const
{
.....
.....
if( k == STD_VECTOR || k == STD_VECTOR_VECTOR )
{
CV_Assert( d == 2 && (sizes[0] == 1 || sizes[1] == 1 || sizes[0]*sizes[1] == 0) );
.....
.....
}
}
这个断言失败了,因为在我的情况下d
等于1。
我做错了什么?
答案 0 :(得分:0)
将Mat尺寸更改为源图像。
答案 1 :(得分:0)
您传递的昏暗值为1,而断言它为2失败。