使用 OpenCvSharp 绘制矩形
Drawing rectangles using OpenCvSharp
我正在尝试在其上实时绘制视频中检测到的面孔,但我似乎无法让它工作
var haarcascade = new CascadeClassifier("C:/Users/NotMyName/Desktop/haar/haarcascade_frontalface_alt2.xml");
using (Window window = new Window("capture"))
using (Mat image = new Mat())//Image Buffer
{
while (true)
{
Video.Read(image);
var gray = image.CvtColor(ColorConversionCodes.RGB2GRAY);
OpenCvSharp.Rect[] faces = haarcascade.DetectMultiScale(gray, 1.08, 2, HaarDetectionTypes.ScaleImage, new OpenCvSharp.Size(30,30));
foreach (Rect i in faces)
{
Cv2.Rectangle(image, (faces[i].BottomRight.X, faces[i].BottomRight.Y), (faces[i].TopLeft.X, faces[i].TopLeft.Y), 255, 1);
}
但是,编译器只是吐出错误。将 faces 数组直接传递给函数也没有用。错误消息是(翻译自德语)。
Error CS0029 The Type "OpenCvSharp.Rect" can't be converted to "int"
我认为正确的方法应该是这样的:
...
foreach (Rect i in faces)
{
Cv2.Rectangle(image, new Point(i.BottomRight.X, i.BottomRight.Y), new Point(i.TopLeft.X, i.TopLeft.Y), 255, 1);
}
....
foreach 中的局部变量i
引用当前Rect
。
Cv2.Rectangle
方法接受 OpenCvSharp.Point
.
可以直接使用Rect
变量:
foreach (Rect r in faces)
Cv2.Rectangle(image, (r.BottomRight.X, r.BottomRight.Y), (r.TopLeft.X, r.TopLeft.Y), 255, 1);
或像这样使用 int
:
foreach (int i = 0; i < faces.Length; i++)
Cv2.Rectangle(image, (faces[i].BottomRight.X, faces[i].BottomRight.Y), (faces[i].TopLeft.X, faces[i].TopLeft.Y), 255, 1);
我正在尝试在其上实时绘制视频中检测到的面孔,但我似乎无法让它工作
var haarcascade = new CascadeClassifier("C:/Users/NotMyName/Desktop/haar/haarcascade_frontalface_alt2.xml");
using (Window window = new Window("capture"))
using (Mat image = new Mat())//Image Buffer
{
while (true)
{
Video.Read(image);
var gray = image.CvtColor(ColorConversionCodes.RGB2GRAY);
OpenCvSharp.Rect[] faces = haarcascade.DetectMultiScale(gray, 1.08, 2, HaarDetectionTypes.ScaleImage, new OpenCvSharp.Size(30,30));
foreach (Rect i in faces)
{
Cv2.Rectangle(image, (faces[i].BottomRight.X, faces[i].BottomRight.Y), (faces[i].TopLeft.X, faces[i].TopLeft.Y), 255, 1);
}
但是,编译器只是吐出错误。将 faces 数组直接传递给函数也没有用。错误消息是(翻译自德语)。
Error CS0029 The Type "OpenCvSharp.Rect" can't be converted to "int"
我认为正确的方法应该是这样的:
...
foreach (Rect i in faces)
{
Cv2.Rectangle(image, new Point(i.BottomRight.X, i.BottomRight.Y), new Point(i.TopLeft.X, i.TopLeft.Y), 255, 1);
}
....
foreach 中的局部变量i
引用当前Rect
。
Cv2.Rectangle
方法接受 OpenCvSharp.Point
.
可以直接使用Rect
变量:
foreach (Rect r in faces)
Cv2.Rectangle(image, (r.BottomRight.X, r.BottomRight.Y), (r.TopLeft.X, r.TopLeft.Y), 255, 1);
或像这样使用 int
:
foreach (int i = 0; i < faces.Length; i++)
Cv2.Rectangle(image, (faces[i].BottomRight.X, faces[i].BottomRight.Y), (faces[i].TopLeft.X, faces[i].TopLeft.Y), 255, 1);