在Java绑定中通过OpenCV Mat循环 我试图用OpenCV Java绑定< /P>将一个C++方法从一个OpenCV接收到的java转换成java。
C++代码:在Java绑定中通过OpenCV Mat循环 我试图用OpenCV Java绑定< /P>将一个C++方法从一个OpenCV接收到的java转换成java。,java,c++,opencv,image-processing,javacv,Java,C++,Opencv,Image Processing,Javacv,C++代码: cv::Mat gray; cv::Mat element = cv::getStructuringElement(cv::MORPH_CROSS, cv::Size(2 * erosion_size + 1, 2 * erosion_size + 1), cv::Point(erosion_size, erosion_size
cv::Mat gray;
cv::Mat element = cv::getStructuringElement(cv::MORPH_CROSS,
cv::Size(2 * erosion_size + 1, 2 * erosion_size + 1),
cv::Point(erosion_size, erosion_size) );
cv::erode(gray, gray, element);
// Scan the image searching for points and store them in a vector
std::vector<cv::Point> points;
cv::Mat_<uchar>::iterator it = gray.begin<uchar>();
cv::Mat_<uchar>::iterator end = gray.end<uchar>();
for (; it != end; it++)
{
if (*it)
points.push_back(it.pos());
}
我看了一遍,似乎
Mat
确实有方法获取行
和cols
,但我不能调用任何东西的迭代器。如果Mat
是真正的灰色,它可能是CV_8U
类型:
for (int i = 0; i < gray.rows; i++)
{
for (int j = 0; j < gray.cols; j++)
{
byte pixel = gray.get(i, j);
}
}
for(int i=0;i
我没有测试此代码的环境设置。有关更多信息,请查看
如果您使用的是JavaCV,不久前我编写了一段代码,对彩色图像的像素进行迭代,并将其转换为灰度,如下所示:
IplImage imageSrc = cvLoadImage("pipeline.png", CV_LOAD_IMAGE_COLOR);
if (imageSrc == null)
{
System.out.println("!!! Failed loading image");
return;
}
double r, g, b;
r = g = b = 0.0;
IplImage imageDst = IplImage.create(imageSrc.width(), imageSrc.height(), IPL_DEPTH_8U, 3);
CvMat imagePixels = CvMat.createHeader(imageDst.height(), imageDst.width(), CV_32FC1);
cvGetMat(imageDst, imagePixels, null, 0);
int x, y;
for(y=0; y<imageSrc.height(); y++)
for(x=0; x<imageSrc.width(); x++)
{
CvScalar rgb = cvGet2D(imagePixels, y, x);
r = rgb.val(0);
g = rgb.val(2);
b = rgb.val(1);
double gray = (r + g + b) / 3;
CvScalar scalar = new CvScalar();
scalar.setVal(0, gray);
scalar.setVal(1, gray);
scalar.setVal(2, gray);
cvSet2D(imagePixels, y, x, scalar);
}
imageDst = new IplImage(imagePixels);
IplImage result = new IplImage(imagePixels);
cvSaveImage("manual_gray.png", result);
cvReleaseImage(imageSrc);
IplImage-imageSrc=cvLoadImage(“pipeline.png”,CV\u-LOAD\u-IMAGE\u-COLOR);
if(imageSrc==null)
{
System.out.println(!!!加载图像失败);
返回;
}
双r,g,b;
r=g=b=0.0;
IplImage imageDst=IplImage.create(imageSrc.width(),imageSrc.height(),IPL_DEPTH_8U,3);
CvMat imagePixels=CvMat.createHeader(imageDst.height(),imageDst.width(),CV_32FC1);
cvGetMat(imageDst,imagePixels,null,0);
int x,y;
对于(y=0;y就像我以前告诉过你的,使用JavaCV。@syb0rg看起来你以前删除了你的答案。不要被否决票吓到了。这是有地域性的。@DrewDormann我没有被吓到,它被否决了,另一个答案被接受了,这意味着OP没有听我的建议。如果他们愿意的话,他们的生活会轻松得多。。。@syb0rg我尝试了JavaCV,但是,它没有我想要的一些方法。例如getStructuringElement
。可能它们对该方法有不同的名称,但我找不到它。经历了这些痛苦之后,我决定尝试一下OpenCV java绑定,因为它们与C函数的匹配率为1:1至少。@karlphillip你能和这个问题核对一下吗。
IplImage imageSrc = cvLoadImage("pipeline.png", CV_LOAD_IMAGE_COLOR);
if (imageSrc == null)
{
System.out.println("!!! Failed loading image");
return;
}
double r, g, b;
r = g = b = 0.0;
IplImage imageDst = IplImage.create(imageSrc.width(), imageSrc.height(), IPL_DEPTH_8U, 3);
CvMat imagePixels = CvMat.createHeader(imageDst.height(), imageDst.width(), CV_32FC1);
cvGetMat(imageDst, imagePixels, null, 0);
int x, y;
for(y=0; y<imageSrc.height(); y++)
for(x=0; x<imageSrc.width(); x++)
{
CvScalar rgb = cvGet2D(imagePixels, y, x);
r = rgb.val(0);
g = rgb.val(2);
b = rgb.val(1);
double gray = (r + g + b) / 3;
CvScalar scalar = new CvScalar();
scalar.setVal(0, gray);
scalar.setVal(1, gray);
scalar.setVal(2, gray);
cvSet2D(imagePixels, y, x, scalar);
}
imageDst = new IplImage(imagePixels);
IplImage result = new IplImage(imagePixels);
cvSaveImage("manual_gray.png", result);
cvReleaseImage(imageSrc);