想要模糊图像

问题描述

我正在研究项目.我正在使用网络摄像头使用emgucv在c#中检测人脸.
一切正常，例如当我运行应用程序时，它启动网络摄像头，然后开始检测面部..
但是现在我要做的是，当它检测到人脸时，应该只模糊人脸，而不是整个网络摄像头视频.或显示其他图像而不是检测到的脸部.
我在图片框中显示人脸检测到的视频.
这是我的代码，到目前为止我已经完成了..

i am working on project. I am using webcam to detect faces in c#, using emgucv.
Every thing is working fine,like when i run application it starts webcam then it starts detecting faces..
But now i want to do is, that when it detects faces , it should blur the face only,not the whole webcam video. or it show some other image instead of detected face.
And i am showing the face detected video in picturebox.
this is my code, i have done so far..

Image<Bgr, byte> ImageFrame = capture.QueryFrame();


            if (ImageFrame != null)
            {
                //convert the image to gray scale
                Image<Gray, byte> grayframe = ImageFrame.Convert<Gray, byte>();

                //detect faces from the gray-scale image and store into an array of type 'var'
                var faces = grayframe.DetectHaarCascade(haar, 1.4, 0,
                                                       HAAR_DETECTION_TYPE.DEFAULT,
                                                       new Size(25, 25))[0];





                //draw a green rectangle on each detected face in image
                foreach (var face in faces)
                {

                    ImageFrame.Draw(face.rect, new Bgr(Color.Green), 2);


                }


            }

            camimagebox.Image = ImageFrame;

现在我只想模糊检测到的脸，就这样..请尽快帮助我..
我还用过:

ImageFrame.SmoothBlur(face.rect.Width，face.rect.Height)

但是什么也没发生...

Now i just want to blur the detected face, thats it..kindly help me as soon as you can..
I also used:

ImageFrame.SmoothBlur(face.rect.Width, face.rect.Height)

but nothing happened...

推荐答案

Image<Gray, float> inputImage;
//Set inputImage to whatever image you want to smooth

Image<Gray, float> smoothedImage = new Image<Gray, float>(inputImage.Width, inputImage.Height);

//You can use whichever smooth type you need, gaussian is fairly common, but not the only way to do it.

int apertureWidth = 10;
int apertureHeight = 10;
//The aperture is the size of the smoothing window
//The smoothing window is typically a square that is a few pixels wide; a 10x10 square is a good place to start.

//if you set parameter3 and 4 to zero it will use default values.

cvSmooth(inputImage.Ptr, smoothedImage.Ptr, SMOOTH_TYPE.CV_GAUSSIAN, apertureWidth , apertureHeight , 0, 0);

请在此处进行解释调用cvSmooth.

您需要按照此处.

另请阅读此 [ ^ ]在openCV图像过滤中，cvSmooth大约是页面底部的3/4.

Look here for an explanation of the call to cvSmooth.

You will need to select the smooth type as explained here.

Also read this[^] on openCV Image Filtering, cvSmooth is about 3/4 of the way down the page.

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