C ++ OpenCV的转垫成的一维数组 [英] c++ OpenCV Turn a Mat into a 1 Dimensional Array
本文介绍了C ++ OpenCV的转垫成的一维数组的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有这样的垫
:
Mat testDataMat(386, 2, CV_32FC1, testDataFloat);
从发生在:
float testDataFloat[386][2];
但我无法弄清楚如何把它变成一个1维数组。
But I can't figure out how to turn it into a 1 Dimensional Array.
任何帮助吗?
推荐答案
样本包括:
- 直接法从浮二维数组转换为浮动一维数组。
- 的方式来创建一个CV ::垫从2D float数组
- 的方式来创建从2D CV ::垫有没有填充(例如步长=单行的大小) 1D float数组
- direct method to convert from float 2d array to float 1d array.
- way to create a cv::Mat from 2D float array
- way to create 1D float array from a 2D cv::Mat that has no padding (e.g. stepsize = size of a single row)
这一个作品,对我说:
int main()
{
const int width = 2;
const int height = 386;
float testDataFloat[height][width];
// create/initialize testdata
for(unsigned int j=0; j<height; ++j)
for(unsigned int i=0; i<width; ++i)
{
if(j%5 == 0)
testDataFloat[j][i] = 0.0f;
else
testDataFloat[j][i] = 1.0f;
}
// -----------------------------------------------------------
// Direct convert from 2D array to 1D array:
float * testData1DDirect = (float*)testDataFloat;
// -----------------------------------------------------------
// create Mat with 2D array as input:
cv::Mat testDataMat(height, width, CV_32FC1, testDataFloat);
// convert from Mat to 1D array
// this works only if there is no padding in the matrix.
float * testData1D = (float*)testDataMat.data;
// test whether the arrays are correct
for(unsigned int i=0; i<width*height; ++i)
{
if(testData1D[i] != testData1DDirect[i])
std::cout << "ERROR at position: " << i << std::endl;
}
// output the Mat as an image:
cv::imshow("test", testDataMat);
cv::waitKey(0);
}
这篇关于C ++ OpenCV的转垫成的一维数组的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文