OpenCV C ++ calcHist到Java [英] OpenCV C++ calcHist to Java
问题描述
我想在我的Android设备上运行一些c ++代码;但是,我遇到了一个小的问题,类型 Mat
我正在使用。我试图转换的代码如下(第二个函数调用第一个):
I'm trying to get some c++ code to run on my Android device; however, I'm running into a small little problem with the type of Mat
I'm using. The code I'm trying to convert is as follow (the second function calls the first):
static Mat
histc_(const Mat& src, int minVal=0, int maxVal=255, bool normed=false)
{
Mat result;
// Establish the number of bins.
int histSize = maxVal-minVal+1;
// Set the ranges.
float range[] = { static_cast<float>(minVal), static_cast<float>(maxVal+1) };
const float* histRange = { range };
// calc histogram
calcHist(&src, 1, 0, Mat(), result, 1, &histSize, &histRange, true, false);
// normalize
if(normed) {
result /= (int)src.total();
}
return result.reshape(1,1);
}
static Mat histc(InputArray _src, int minVal, int maxVal, bool normed)
{
Mat src = _src.getMat();
switch (src.type()) {
case CV_8SC1:
return histc_(Mat_<float>(src), minVal, maxVal, normed);
break;
case CV_8UC1:
return histc_(src, minVal, maxVal, normed);
break;
case CV_16SC1:
return histc_(Mat_<float>(src), minVal, maxVal, normed);
break;
case CV_16UC1:
return histc_(src, minVal, maxVal, normed);
break;
case CV_32SC1:
return histc_(Mat_<float>(src), minVal, maxVal, normed);
break;
case CV_32FC1:
return histc_(src, minVal, maxVal, normed);
break;
default:
CV_Error(Error::StsUnmatchedFormats, "This type is not implemented yet."); break;
}
return Mat();
}
现在我的java代码将这两个函数合并为1,因为我的类型总是same:CV_32SC1。
Now my java code combined these 2 functions into 1 since my type is always the same: CV_32SC1.
private Mat histc(Mat src, int minVal, int maxVal)
{
Mat result = new Mat();
MatOfInt histSize = new MatOfInt(maxVal - minVal + 1);
MatOfFloat histRange = new MatOfFloat(minVal, maxVal + 1);
MatOfInt channels = new MatOfInt(0);
Log.d(TAG, "Type: " + CvType.typeToString(src.type()));
src.convertTo(src, CvType.CV_32S);
Imgproc.calcHist(Arrays.asList(src), channels, new Mat(), result, histSize, histRange);
return result.reshape(1,1);
}
我收到错误 OpenCV错误:不支持格式或格式的组合()在void cv :: calcHist
,我发现从另一个问题,这是因为我的 src
矩阵的类型 CV_32SC1
。所以我的问题是,我不知道如何将这些线从第二个c ++函数转换为Java正确:
I'm getting an error OpenCV Error: Unsupported format or combination of formats () in void cv::calcHist
and I found from another question that this is because the type of my src
matrix is CV_32SC1
. So my problem is that I don't know how to convert these lines from the second c++ function into Java properly:
case CV_32SC1:
return histc_(Mat_<float>(src), minVal, maxVal, normed);
break;
我试图找出如何做类似 Mat_<
I'm trying to figure out how to do something similar to Mat_<float>(src)
in Java specifically.
参考:这里是指向我现在想做的全部代码的链接
For reference: here is the link to the entire code for what I'm trying to do right now
推荐答案
Mat_<float>(src)
只是根据 calcHist 。
>
So it should be sufficient to do a
src.convertTo(src, CvType.CV_32F);
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