C#实现拍照并且存水印照片

由于一直在高校工作，就涉及到招生工作，招生时候又要收集学生图像采集，所以就随手写了一个图像采集工具，废话不多说，进入正题。

图像采集需要调用摄像头就行拍照操作，网上查了一下资料，需要引用以下3个dll。

看一下运行界面

界面都比较low，主要是功能实现。

        private void Camera_Load(object sender, EventArgs e)
        {
            this.btnSave.Enabled = false;
            try
            {
                borderSize = GetBorderSize(this);
                captionHeight = GetCaptionHeight(this);
                //InitStudent("", "", "");

                this.comboBox_SizeMode.Text = "填充(保持比例)";
                FilterInfoCollection infos = new FilterInfoCollection(FilterCategory.VideoInputDevice);
                if ((infos != null) && (infos.Count > 0))
                {

                }
                else
                {
                    MessageBox.Show("没有视频设备");
                }

                this.LoadVedio();

                this.splitContainer1.Panel2MinSize = 280;
                this.splitContainer1.SplitterDistance = this.splitContainer1.Width - this.splitContainer1.Panel2MinSize + 1;

                mf = new BorderForm();

                mf.Show(this);
                //mf.Left = (this.Left + this.splitContainer1.Panel1.Width - mf.Width) / 2;
                //mf.Top = (this.Top + this.splitContainer1.Panel1.Height - mf.Height) / 2;
                //marLeft = mf.Left - this.Left;
                //marTop = mf.Top - this.Top;

                Rectangle rtPic = this.pictureBox_Camera.RectangleToScreen(this.pictureBox_Camera.ClientRectangle);
                Rectangle rtMF = this.mf.RectangleToScreen(this.mf.ClientRectangle);
                if (rtPic == null || rtMF == null || rtPic.Width == 0 || rtMF.Width == 0)
                {
                    return;
                }
                mf.Left = ((rtMF.Width + rtMF.Left) + (rtPic.Width + rtPic.Left)) / 2;
                mf.Top = ((rtMF.Height + rtMF.Top) + (rtPic.Height + rtPic.Top)) / 2;

                mf.SizeChanged += new EventHandler(mf_SizeChanged);
                mf.LocationChanged += new EventHandler(mf_LocationChanged);

                pictureBox_Camera_SizeChanged(sender, e);

                //启动连拍
                //this.ShootOneTime = 0;
                this.timer1.Start();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

//加载摄像头设备
private void LoadVedio()
        {
            FilterInfoCollection infos = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            if ((infos != null) && (infos.Count > 0))
            {
                int index = 0;
                foreach (FilterInfo info in infos)
                {
                    this.cmbCaptureDevice.Items.Add(new DeviceInfo(info.Name, info.MonikerString, index, FilterCategory.VideoInputDevice));
                    index++;
                }
                this.cmbCaptureDevice.SelectedIndex = 0;
            }
        }

        /// <summary>
        /// 拍照
        /// </summary>
        private void Shoot()
        {
            try
            {
                if (this.pictureBox_Camera.Image != null && (int)this.numericUpDown1.Value > 0 && (int)this.numericUpDown2.Value > 0)
                {
                    Bitmap resultImage = new Bitmap((int)this.numericUpDown1.Value, (int)this.numericUpDown2.Value);
                    Graphics g = Graphics.FromImage(resultImage);
                    g.CopyFromScreen(new Point(this.mf.Location.X + 1, this.mf.Location.Y + 1), new Point(6, 6 + (isWin7 ? 2 : 0)), new Size(resultImage.Size.Width, resultImage.Size.Height - (6 + (isWin7 ? 2 : 0))));
                    if (!string.IsNullOrEmpty(XH))
                    {
                        string str = "";
                        if (this.XH != "")
                        {
                            str = this.XH;
                        }
                        else if (this.SFZH != "")
                        {
                            str = this.SFZH;
                        }
                        else if (this.KSH != "")
                        {
                            str = this.KSH;
                        }
                        if (this.checkBox2.Checked)
                        {
                            str = XM + " " + str;
                        }
                        int txtWidth = (int)(g.MeasureString(str, new Font("宋体", 9)).Width * 1.1);
                        Rectangle rec = new Rectangle((resultImage.Width - txtWidth) / 2, resultImage.Height - 16, txtWidth, 15);
                        g.FillRectangle(Brushes.White, rec);
                        StringFormat sf = new StringFormat();
                        sf.LineAlignment = StringAlignment.Center;
                        sf.Alignment = StringAlignment.Center;
                        rec.Height++;
                        g.DrawString(str, new Font("宋体", 9), Brushes.Black, rec, sf);
                    }
                    this.pictureBox_tx.Image = resultImage;
                }
                else
                {
                    this.pictureBox_tx.Image = null;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

//选择摄像装置
private void cmbCaptureDevice_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (this.cmbCaptureDevice.SelectedItem != null)
            {
                this.cmbDeviceCapability.Items.Clear();
                VideoCaptureDevice device = new VideoCaptureDevice(((DeviceInfo)this.cmbCaptureDevice.SelectedItem).MonikerString);
                for (int i = 0; i < device.VideoCapabilities.Length; i++)
                {
                    VideoCapabilities capabilities = device.VideoCapabilities[i];
                    DeviceCapabilityInfo item = new DeviceCapabilityInfo(capabilities.FrameSize);
                    this.cmbDeviceCapability.Items.Add(item);
                }
                DeviceInfo selectedItem = (DeviceInfo)this.cmbCaptureDevice.SelectedItem;
                if (this.captureAForge != null)
                {
                    this.captureAForge.NewFrame -= new NewFrameEventHandler(this.captureAForge_NewFrame);
                    //this.captureAForge.SnapshotFrame -= new NewFrameEventHandler(this.captureAForge_SnapshotFrame);
                    if (this.captureAForge.IsRunning)
                    {
                        this.captureAForge.SignalToStop();
                    }
                    this.captureAForge.WaitForStop();
                    this.captureAForge = null;
                }
                this.captureAForge = new VideoCaptureDevice(selectedItem.MonikerString);
                this.captureAForge.ProvideSnapshots = true;
                this.captureAForge.NewFrame += new NewFrameEventHandler(this.captureAForge_NewFrame);
                //this.captureAForge.SnapshotFrame += new NewFrameEventHandler(this.captureAForge_SnapshotFrame);
                if (this.cmbDeviceCapability.Items.Count > 0)
                {
                    this.cmbDeviceCapability.SelectedIndex = 0;
                }
            }
        }

//选择分辨率
 private void cmbDeviceCapability_SelectedIndexChanged(object sender, EventArgs e)
        {
            string[] strArray = this.cmbDeviceCapability.Text.Trim().Split(new char[] { 'x' });
            int width = int.Parse(strArray[0]);
            int height = int.Parse(strArray[1]);
            if (this.captureAForge != null)
            {
                if (this.captureAForge.IsRunning)
                {
                    this.captureAForge.SignalToStop();
                }
                this.captureAForge.WaitForStop();
                this.captureAForge.DesiredFrameSize = new Size(width, height);
                this.captureAForge.DesiredSnapshotSize = new Size(width, height);

                //this.captureAForge.DesiredFrameRate = 1000;

                this.captureAForge.Start();

            }
        }

//设置数据源大小     
private void comboBox_SizeMode_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (this.comboBox_SizeMode.Text)
            {
                case "默认(原始大小)":
                    this.pictureBox_Camera.SizeMode = PictureBoxSizeMode.Normal;
                    break;
                case "居中(原始大小)":
                    this.pictureBox_Camera.SizeMode = PictureBoxSizeMode.CenterImage;
                    break;
                case "填充(拉伸图像)":
                    this.pictureBox_Camera.SizeMode = PictureBoxSizeMode.StretchImage;
                    break;
                case "填充(保持比例)":
                    this.pictureBox_Camera.SizeMode = PictureBoxSizeMode.Zoom;
                    break;
            }
        }

//保存照片
private void buttonSave_Click(object sender, EventArgs e)
        {
            try
            {
                string filename = Path.Combine(Application.StartupPath, "StuImages", "Newstuimages", this.XH + ".JPG");
                if (!this.checkBox1.Checked && File.Exists(filename))
                {
                    if (MessageBox.Show("该生已经有照片文件，是否覆盖?     ", "", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) == DialogResult.OK)
                    {
                        //存储到本地
                        this.pictureBox_tx.Image.Save(filename);
                        //OnDataChanged(this, new DataEventArgs(string.Format("头像采集(覆盖)，学号：{0}，姓名：{1}，考生号：{2}，身份证号：{3}", this.XH, this.XM, this.KSH, this.SFZH)));
                        this.txtKSH.Focus();
                        this.txtKSH.SelectAll();
                    }
                    else
                    {
                        return;
                    }
                }
                else
                {
                    this.pictureBox_tx.Image.Save(filename);
                    //OnDataChanged(this, new DataEventArgs(string.Format("头像采集，学号：{0}，姓名：{1}，考生号：{2}，身份证号：{3}", this.XH, this.XM, this.KSH, this.SFZH)));
                    this.txtKSH.Focus();
                    this.txtKSH.SelectAll();
                }
                this.timer1.Start();
            }
            catch
            {

            }
            finally
            {
                //启用下面一行,点击保存后头像会立即启动刷新
                //this.timer1.Start();
                this.btnSave.Enabled = false;
            }
        }

保存照片可以选择自动覆盖同名照片或者在照片中加入水印效果。

操作时候可以自行拖动长方形的框进行选择拍照

 源码下载:http://files.cnblogs.com/files/luoxiaozhao/Image_acquisitionForm.rar

请支持原创，转载请标明来源。