我正在尝试使用javacv在java中实现面向对齐实现C ++位here,但我坚持如何传递
point2f []为getAffineTransform()中的point2f。
这是我能够提出的;
//face alignment begin
Point2f[] srcTri = new Point2f[3];
Point2f[] dstTri = new Point2f[3];
Mat src_mat= new Mat(orig);
Mat dst_mat= new Mat(input);
Mat warp_mat = new Mat( 2, 3, CV_32FC1);
//Set the dst image the same type and size as src
Mat warp_dst = new Mat(src_mat.rows(), src_mat.cols(), src_mat.type());
//Set your 3 points to calculate the Affine Transform
srcTri[0] = new Point2f((float)landmarks[5*2], (float)landmarks[5*2+1]);
srcTri[1] = new Point2f((float)landmarks[6*2], (float)landmarks[6*2+1]);
srcTri[2] = new Point2f((float)landmarks[0*2], (float)landmarks[0*2+1]);
dstTri[0] = new Point2f((float)landmarks[5*2], (float)landmarks[5*2+1]);
dstTri[1] = new Point2f((float)landmarks[6*2], (float)landmarks[6*2+1]);
dstTri[2] = new Point2f((float)landmarks[0*2], (float)landmarks[0*2+1]);
//Get the Affine Transform
warp_mat = getAffineTransform( srcTri, dstTri ); //This is where I have problems. getAffineTransform() expects Point2f but I have Point2f[]
//Apply the Affine Transform just found to the src image
warpAffine(src_mat, warp_dst, warp_mat, warp_dst.size());
//show images
imshow("src", src_mat);
imshow("dst", dst_mat);
imshow("warp_dst", warp_dst);
waitKey(0);
//face alignment end
有人请告诉我如何将srcTri和dstTri作为Point2f传递给getAffineTransform()或如何将Point2f []转换为Point2f。甚至可以这样做吗? 怎样才能将地标变成Point2f,可以在getAfflineTransform()中作为参数接受?
我很乐意感谢您对如何在这里导航的帮助。
答案 0 :(得分:1)
我相信这就是答案:https://groups.google.com/d/msg/javacv/dbWTNCHFyeg/Q6k59GPavgsJ:
Point2f
是Pointer
,其作用类似于原生数组: http://bytedeco.org/javacpp-presets/opencv/apidocs/org/bytedeco/javacpp/opencv_core.Point2f.html我们可以使用
Pointer
来执行此类操作来访问元素 本机数组: http://bytedeco.org/javacpp/apidocs/org/bytedeco/javacpp/Pointer.html#position-int-查看README文件以获取
CvPoint
的示例: https://github.com/bytedeco/javacv#sample-usage现在做同样的事情, 但是Point2f
。
所以你的代码应该像这样修改:
Point2f srcTri = new Point2f(3);
Point2f dstTri = new Point2f(3);
// ...
srcTri.position(0).x((float)landmarks[5*2]).y((float)landmarks[5*2+1]);
srcTri.position(1).x((float)landmarks[6*2]).y((float)landmarks[6*2+1]);
srcTri.position(2).x((float)landmarks[0*2]).y((float)landmarks[0*2+1]);
// and do the same for dstTri
warp_mat = getAffineTransform( srcTri.position(0), dstTri.position(0) );