using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
using OpenCvSharp;
using OpenCvSharp.Extensions;
namespace OpenCV
{
delegate void dele(Mat m);
public partial class Form1 : Form
{
bool isCameraOn;
dele filter; // 카메라에 적용할 필터(효과) 델리게이트
Thread thread;
Mat mat;
VideoCapture videoCapture;
public Form1()
{
InitializeComponent();
this.FormBorderStyle = FormBorderStyle.FixedSingle;
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
button1.Text = "Camera Start";
isCameraOn = false;
filter = null;
radioButton1.Checked = true;
}
private void CameraCallback()
{
mat = new Mat();
videoCapture = new VideoCapture(0);
if (!videoCapture.IsOpened())
{
Text = "Camera open failed!";
MessageBox.Show("카메라를 열 수 없습니다. 연결 상태를 확인 해 주세요.");
return;
}
while (true)
{
videoCapture.Read(mat);
if (!mat.Empty() && filter != null)
{
filter(mat); // 선택된 라디오 버튼에 따른 필터 적용.
}
if (!mat.Empty())
{
// 로고를 디스플레이하기 위해 그레이 이미지(1채널)는 컬러 포맷(3채널)으로 변환
if (mat.Channels() == 1)
{
Cv2.CvtColor(mat, mat, ColorConversionCodes.GRAY2BGR);
}
Cv2.PutText(mat, "SEAN", new OpenCvSharp.Point(550, 470), HersheyFonts.HersheyDuplex, 1, new Scalar(0, 0, 255), 2);
// 이 전 프레임에서 PictureBox에 로드된 비트맵 이미지를 Dispose하지 않으면 메모리 사용량이 크게 증가한다.
if (pictureBox1.Image != null)
{
pictureBox1.Image.Dispose();
}
pictureBox1.Image = BitmapConverter.ToBitmap(mat);
}
}
}
private void button1_Click(object sender, EventArgs e)
{
if (isCameraOn == false)
{
thread = new Thread(new ThreadStart(CameraCallback));
thread.Start();
isCameraOn = true;
button1.Text = "Camera Stop";
}
else
{
if (videoCapture.IsOpened())
{
thread.Abort();
if (pictureBox1.Image != null)
{
pictureBox1.Image.Dispose();
}
videoCapture.Release();
mat.Release();
}
isCameraOn = false;
button1.Text = "Camera Start";
}
}
private void button2_Click(object sender, EventArgs e)
{
System.Diagnostics.Process.Start("https://s-engineer.tistory.com/");
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (thread != null && thread.IsAlive && videoCapture.IsOpened())
{
thread.Abort();
if (pictureBox1.Image != null)
{
pictureBox1.Image.Dispose();
}
videoCapture.Release();
mat.Release();
}
}
// 필터 함수들
private void ToGray(Mat mat)
{
Cv2.CvtColor(mat, mat, ColorConversionCodes.BGR2GRAY);
}
private void ToEmboss(Mat mat)
{
float[] data = { -1.0f, -1.0f, 0.0f, -1.0f, 0f, 1.0f, 0.0f, 1.0f, 1.0f };
Mat emboss = new Mat(3, 3, MatType.CV_32FC1, data);
Cv2.CvtColor(mat, mat, ColorConversionCodes.BGR2GRAY);
Cv2.Filter2D(mat, mat, -1, emboss, new OpenCvSharp.Point(-1, -1), 128);
emboss.Release();
}
private void ToBlur(Mat mat)
{
Cv2.GaussianBlur(mat, mat, new OpenCvSharp.Size(), (double)3);
}
private void ToSharpen(Mat mat)
{
Mat blurred = new Mat();
Cv2.GaussianBlur(mat, blurred, new OpenCvSharp.Size(), (double)3);
// 아래 연산이 반복되면 메모리 사용량이 크게 증가한다.
float alpha = 2.0f;
((1 + alpha) * mat - alpha * blurred).ToMat().CopyTo(mat);
//mat = (1 + alpha) * mat - alpha * blurred;
blurred.Release();
}
private void ToEdge(Mat mat)
{
Cv2.CvtColor(mat, mat, ColorConversionCodes.BGR2GRAY);
Cv2.Canny(mat, mat, 50, 70);
}
// 라디오 버튼 이벤트 핸들러들
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
if (((RadioButton)sender).Checked)
{
filter = null;
}
}
private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
if (((RadioButton)sender).Checked)
{
filter = ToGray;
}
}
private void radioButton3_CheckedChanged(object sender, EventArgs e)
{
if (((RadioButton)sender).Checked)
{
filter = ToEmboss;
}
}
private void radioButton4_CheckedChanged(object sender, EventArgs e)
{
if (((RadioButton)sender).Checked)
{
filter = ToBlur;
}
}
private void radioButton5_CheckedChanged(object sender, EventArgs e)
{
if (((RadioButton)sender).Checked)
{
filter = ToSharpen;
}
}
private void radioButton6_CheckedChanged(object sender, EventArgs e)
{
if (((RadioButton)sender).Checked)
{
filter = ToEdge;
}
}
}
}
