实例介绍
【实例简介】
【实例截图】
-
【核心代码】
#region License of Sample /* CameraControlTool - is a complicated sample of CameraControl usage Copyright (C) 2013 https://github.com/free5lot/Camera_Net While the Camera_Net library is covered by LGPL, this sample is released as PUBLIC DOMAIN. So, you can use code from this sample in your free or proprietary project without any limitations. It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */ #endregion namespace CameraControlTool { #region Using directives using System; using System.Windows.Forms; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Drawing2D; using System.Drawing.Text; using System.Runtime.InteropServices.ComTypes; using Camera_NET; using DirectShowLib; #endregion public partial class FormCameraControlTool : Form { #region Vars // Camera object //private Camera _Camera; // Rect selection with mouse private NormalizedRect _MouseSelectionRect = new NormalizedRect(0, 0, 0, 0); private bool _bDrawMouseSelection = false; // Zooming private bool _bZoomed = false; private double _fZoomValue = 1.0; // Camera choice private CameraChoice _CameraChoice = new CameraChoice(); #endregion #region Winforms stuff // Constructor public FormCameraControlTool() { InitializeComponent(); //SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true); } // On load of Form private void FormCameraControlTool_Load(object sender, EventArgs e) { // Fill camera list combobox with available cameras FillCameraList(); // Select the first one if (comboBoxCameraList.Items.Count > 0) { comboBoxCameraList.SelectedIndex = 0; } // Fill camera list combobox with available resolutions FillResolutionList(); } // On close of Form private void FormMain_FormClosed(object sender, FormClosedEventArgs e) { // Close camera cameraControl.CloseCamera(); } // Update buttons of GUI based on Camera state private void UpdateGUIButtons() { buttonCrossbarSettings.Enabled = (cameraControl.CrossbarAvailable); } #endregion #region Camera creation and destroy // Set current camera to camera_device private void SetCamera(IMoniker camera_moniker, Resolution resolution) { try { // NOTE: You can debug with DirectShow logging: //cameraControl.DirectShowLogFilepath = @"C:\YOUR\LOG\PATH.txt"; // Makes all magic with camera and DirectShow graph cameraControl.SetCamera(camera_moniker, resolution); } catch (Exception e) { MessageBox.Show(e.Message, @"Error while running camera"); } if (!cameraControl.CameraCreated) return; // If you are using Direct3D surface overlay // (see documentation about rebuild of library for it) //cameraControl.UseGDI = false; cameraControl.MixerEnabled = true; cameraControl.OutputVideoSizeChanged = Camera_OutputVideoSizeChanged; UpdateCameraBitmap(); // gui update UpdateGUIButtons(); } #endregion #region Functions Buttons private void buttonMixerOnOff_Click(object sender, EventArgs e) { cameraControl.MixerEnabled = !cameraControl.MixerEnabled; } private void buttonSnapshotOutputFrame_Click(object sender, EventArgs e) { if (!cameraControl.CameraCreated) return; Bitmap bitmap = cameraControl.SnapshotOutputImage(); if (bitmap == null) return; pictureBoxScreenshot.Image = bitmap; pictureBoxScreenshot.Update(); } private void buttonSnapshotNextSourceFrame_Click(object sender, EventArgs e) { if (!cameraControl.CameraCreated) return; Bitmap bitmap = null; try { bitmap = cameraControl.SnapshotSourceImage(); } catch (Exception ex) { MessageBox.Show(ex.Message, @"Error while getting a snapshot"); } if (bitmap == null) return; pictureBoxScreenshot.Image = bitmap; pictureBoxScreenshot.Update(); } private void buttonClearSnapshotFrame_Click(object sender, EventArgs e) { pictureBoxScreenshot.Image = null; pictureBoxScreenshot.Update(); } // Example of crossbar usage private void buttonCrossbarSettings_Click(object sender, EventArgs e) { if (cameraControl.CameraCreated) { cameraControl.DisplayPropertyPage_Crossbar(this.Handle); } } // Example of TVMode usage private void buttonTVMode_Click(object sender, EventArgs e) { if (cameraControl.CameraCreated) { MessageBox.Show(cameraControl.GetTVMode().ToString()); } } private void buttonCameraSettings_Click(object sender, EventArgs e) { if (cameraControl.CameraCreated) { Camera.DisplayPropertyPage_Device(cameraControl.Moniker, this.Handle); } } #endregion #region Camera event handlers // Event handler for OutputVideoSizeChanged event private void Camera_OutputVideoSizeChanged(object sender, EventArgs e) { // Update camera's bitmap (new size needed) UpdateCameraBitmap(); // Place Zoom button in correct place on form UpdateUnzoomButton(); } #endregion #region Overlay bitmaps stuff // Generate bitmap for overlay private void UpdateCameraBitmap() { if (!cameraControl.MixerEnabled) return; cameraControl.OverlayBitmap = GenerateColorKeyBitmap(false); #region D3D bitmap mixer //if (cameraControl.UseGDI) //{ // cameraControl.OverlayBitmap = GenerateColorKeyBitmap(false); //} //else //{ // cameraControl.OverlayBitmap = GenerateAlphaBitmap(); //} #endregion } // NOTE: This function is an example of overlay bitmap usage // Create bitmap with selection rect, text or any other overlay private Bitmap GenerateColorKeyBitmap(bool useAntiAlias) { int w = cameraControl.OutputVideoSize.Width; int h = cameraControl.OutputVideoSize.Height; if (w <= 0 || h <= 0) return null; // Create RGB bitmap Bitmap bmp = new Bitmap(w, h, PixelFormat.Format24bppRgb); Graphics g = Graphics.FromImage(bmp); // configure antialiased drawing or not if (useAntiAlias) { g.SmoothingMode = SmoothingMode.AntiAlias; g.TextRenderingHint = TextRenderingHint.AntiAlias; } else { g.SmoothingMode = SmoothingMode.None; g.TextRenderingHint = TextRenderingHint.SingleBitPerPixelGridFit; } // Clear the bitmap with the color key g.Clear(cameraControl.GDIColorKey); // Draw selection rect -------------------------- if (_bDrawMouseSelection && IsMouseSelectionRectCorrect()) { Color color_of_pen = Color.Gray; if (IsMouseSelectionRectCorrectAndGood()) { color_of_pen = Color.Green; } Pen pen = new Pen(color_of_pen, 2.0f); Rectangle rect = new Rectangle( (int)(_MouseSelectionRect.left * w), (int)(_MouseSelectionRect.top * h), (int)((_MouseSelectionRect.right - _MouseSelectionRect.left) * w), (int)((_MouseSelectionRect.bottom - _MouseSelectionRect.top) * h) ); g.DrawLine(pen, rect.Left - 5, rect.Top, rect.Right 5, rect.Top); g.DrawLine(pen, rect.Left - 5, rect.Bottom, rect.Right 5, rect.Bottom); g.DrawLine(pen, rect.Left, rect.Top - 5, rect.Left, rect.Bottom 5); g.DrawLine(pen, rect.Right, rect.Top - 5, rect.Right, rect.Bottom 5); pen.Dispose(); } // Draw zoom text if needed if (_bZoomed) { Font font = new Font("Tahoma", 16); Brush textColorKeyed = new SolidBrush(Color.DarkBlue); g.DrawString("Zoom: " Math.Round(_fZoomValue, 1).ToString("0.0") "x", font, textColorKeyed, 4, 4); font.Dispose(); textColorKeyed.Dispose(); } // Draw text logo for example { Font font = new Font("Tahoma", 16); Brush textColorKeyed = new SolidBrush(Color.Yellow); g.DrawString("Sample project for Camera_NET component", font, textColorKeyed, 4, h - 30); } // dispose Graphics g.Dispose(); // return the bitmap return bmp; } #region D3D bitmap mixer //public Bitmap GenerateAlphaBitmap() //{ // // Alpha values // int alpha50 = (int)(255 * 0.50f); // 50% opacity // // Some drawing tools needed later // Pen blackBorder = new Pen(Color.Black, 2.0f); // Brush red50 = new SolidBrush(Color.FromArgb(alpha50, Color.Red)); // Font font = new Font("Tahoma", 16); // int w = _Camera.OutputVideoSize.Width; // int h = _Camera.OutputVideoSize.Height; // // Create a ARGB bitmap // Bitmap bmp = new Bitmap(w, h, PixelFormat.Format32bppArgb); // Graphics g = Graphics.FromImage(bmp); // // Do antialiased drawings // g.SmoothingMode = SmoothingMode.AntiAlias; // g.TextRenderingHint = TextRenderingHint.AntiAlias; // // Clear the bitmap with complete transparency // g.Clear(Color.Transparent); // // Draw a green circle with black border in the middle // //g.FillEllipse(green, 320 * w / 640, 240 * h / 480, 155 * w / 640, 155 * h / 480); // g.FillEllipse(red50, w / 2 - 70, h / 2 - 70, 140, 140); // g.DrawEllipse(blackBorder, w / 2 - 70, h / 2 - 70, 140, 140); // // Release GDI objects // blackBorder.Dispose(); // red50.Dispose(); // g.Dispose(); // // return the bitmap // return bmp; //} #endregion // Swritch GDI/D3D //private void button3_Click(object sender, EventArgs e) //{ // cameraControl.MixerEnabled = false; // cameraControl.UseGDI = !cameraControl.UseGDI; // UpdateCameraBitmap(); // if (!cameraControl.MixerEnabled) // cameraControl.MixerEnabled = true; //} #endregion #region Mouse selection stuff private void cameraControl_MouseDown(object sender, MouseEventArgs e) { if (e.Button != MouseButtons.Left) return; if (!cameraControl.CameraCreated) return; if (_bZoomed) return; PointF point = cameraControl.ConvertWinToNorm(new PointF(e.X, e.Y)); _MouseSelectionRect = new NormalizedRect(point.X, point.Y, point.X, point.Y); _bDrawMouseSelection = true; UpdateCameraBitmap(); } private void cameraControl_MouseUp(object sender, MouseEventArgs e) { if (_bZoomed) return; if (!_bDrawMouseSelection) return; // Zoom if (!IsMouseSelectionRectCorrectAndGood()) { // Doesn't allow zoom too much _bDrawMouseSelection = false; UpdateCameraBitmap(); return; } int w = cameraControl.Resolution.Width; int h = cameraControl.Resolution.Height; double rect_w = w * (_MouseSelectionRect.right - _MouseSelectionRect.left); double rect_h = h * (_MouseSelectionRect.bottom - _MouseSelectionRect.top); // Save frame proportion double ratio_video = ((double)w) / h; double ratio_rect = ((double)rect_w) / rect_h; //NormalizedRect norm_rect; if (ratio_video >= ratio_rect) { // calculate width double needed_rect_width = rect_h * ratio_video; _MouseSelectionRect.left -= (float)(((needed_rect_width - rect_w) / 2) / w); _MouseSelectionRect.right = (float)(((needed_rect_width - rect_w) / 2) / w); _fZoomValue = (double)h / rect_h; } else { // calculate height double needed_rect_height = rect_w / ratio_video; _MouseSelectionRect.top -= (float)(((needed_rect_height - rect_h) / 2) / h); _MouseSelectionRect.bottom = (float)(((needed_rect_height - rect_h) / 2) / h); _fZoomValue = (double)w / rect_w; } Rectangle rect = new Rectangle( (int)(_MouseSelectionRect.left * w), (int)(_MouseSelectionRect.top * h), (int)((_MouseSelectionRect.right - _MouseSelectionRect.left) * w), (int)((_MouseSelectionRect.bottom - _MouseSelectionRect.top) * h) ); cameraControl.ZoomToRect(rect); _bZoomed = true; _bDrawMouseSelection = false; UpdateCameraBitmap(); // Place Zoom button in correct place on form UpdateUnzoomButton(); } private void cameraControl_MouseMove(object sender, MouseEventArgs e) { if (e.Button != MouseButtons.Left) return; if (!cameraControl.CameraCreated) return; if (_bZoomed) return; if (!_bDrawMouseSelection) return; PointF point = cameraControl.ConvertWinToNorm(new PointF(e.X, e.Y)); _MouseSelectionRect.right = point.X; _MouseSelectionRect.bottom = point.Y; UpdateCameraBitmap(); } private bool IsMouseSelectionRectCorrect() { if (Math.Abs(_MouseSelectionRect.right - _MouseSelectionRect.left) < float.Epsilon*10 || Math.Abs(_MouseSelectionRect.bottom - _MouseSelectionRect.top) < float.Epsilon*10) { return false; } if (_MouseSelectionRect.left >= _MouseSelectionRect.right || _MouseSelectionRect.top >= _MouseSelectionRect.bottom) { return false; } if (_MouseSelectionRect.left < 0 || _MouseSelectionRect.top < 0 || _MouseSelectionRect.right > 1.0 || _MouseSelectionRect.bottom > 1.0) { return false; } return true; } private bool IsMouseSelectionRectCorrectAndGood() { if (! IsMouseSelectionRectCorrect()) { return false; } // Zoom if (Math.Abs(_MouseSelectionRect.right - _MouseSelectionRect.left) < 0.1f || Math.Abs(_MouseSelectionRect.bottom - _MouseSelectionRect.top) < 0.1f) { return false; } return true; } #endregion #region Zooming stuff // Unzoom on video double-click private void cameraControl_MouseDoubleClick(object sender, MouseEventArgs e) { UnzoomCamera(); } // Unzoom with unzoom button private void buttonUnZoom_Click(object sender, EventArgs e) { UnzoomCamera(); } // Unzoom camera and update gui private void UnzoomCamera() { cameraControl.ZoomToRect(new Rectangle(0, 0, cameraControl.Resolution.Width, cameraControl.Resolution.Height)); _bZoomed = false; _fZoomValue = 1.0; // gui updates UpdateCameraBitmap(); UpdateUnzoomButton(); _bDrawMouseSelection = false; } // Place Zoom button in correct place on form private void UpdateUnzoomButton() { if (_bZoomed) { buttonUnZoom.Left = cameraControl.Left (cameraControl.ClientRectangle.Width - cameraControl.OutputVideoSize.Width) / 2 4; buttonUnZoom.Top = cameraControl.Top (cameraControl.ClientRectangle.Height - cameraControl.OutputVideoSize.Height) / 2 40; buttonUnZoom.Visible = true; } else { buttonUnZoom.Visible = false; } } #endregion #region Camera and resolution selection private void comboBoxCameraList_SelectedIndexChanged(object sender, EventArgs e) { if (comboBoxCameraList.SelectedIndex < 0) { cameraControl.CloseCamera(); } else { // Set camera SetCamera(_CameraChoice.Devices[ comboBoxCameraList.SelectedIndex ].Mon, null); } FillResolutionList(); } private void comboBoxResolutionList_SelectedIndexChanged(object sender, EventArgs e) { if (!cameraControl.CameraCreated) return; int comboBoxResolutionIndex = comboBoxResolutionList.SelectedIndex; if (comboBoxResolutionIndex < 0) { return; } ResolutionList resolutions = Camera.GetResolutionList(cameraControl.Moniker); if ( resolutions == null ) return; if ( comboBoxResolutionIndex >= resolutions.Count ) return; // throw if (0 == resolutions[comboBoxResolutionIndex].CompareTo(cameraControl.Resolution)) { // this resolution is already selected return; } // Recreate camera SetCamera(cameraControl.Moniker, resolutions[comboBoxResolutionIndex]); } private void FillResolutionList() { comboBoxResolutionList.Items.Clear(); if (!cameraControl.CameraCreated) return; ResolutionList resolutions = Camera.GetResolutionList(cameraControl.Moniker); if (resolutions == null) return; int index_to_select = -1; for (int index = 0; index < resolutions.Count; index ) { comboBoxResolutionList.Items.Add(resolutions[index].ToString()); if (resolutions[index].CompareTo(cameraControl.Resolution) == 0) { index_to_select = index; } } // select current resolution if (index_to_select >= 0) { comboBoxResolutionList.SelectedIndex = index_to_select; } } private void FillCameraList() { comboBoxCameraList.Items.Clear(); _CameraChoice.UpdateDeviceList(); foreach (var camera_device in _CameraChoice.Devices) { comboBoxCameraList.Items.Add(camera_device.Name); } } #endregion private void buttonPinOutputSettings_Click(object sender, EventArgs e) { if (cameraControl.CameraCreated) { cameraControl.DisplayPropertyPage_SourcePinOutput(this.Handle); } } } }
好例子网口号:伸出你的我的手 — 分享!
小贴士
感谢您为本站写下的评论,您的评论对其它用户来说具有重要的参考价值,所以请认真填写。
- 类似“顶”、“沙发”之类没有营养的文字,对勤劳贡献的楼主来说是令人沮丧的反馈信息。
- 相信您也不想看到一排文字/表情墙,所以请不要反馈意义不大的重复字符,也请尽量不要纯表情的回复。
- 提问之前请再仔细看一遍楼主的说明,或许是您遗漏了。
- 请勿到处挖坑绊人、招贴广告。既占空间让人厌烦,又没人会搭理,于人于己都无利。
关于好例子网
本站旨在为广大IT学习爱好者提供一个非营利性互相学习交流分享平台。本站所有资源都可以被免费获取学习研究。本站资源来自网友分享,对搜索内容的合法性不具有预见性、识别性、控制性,仅供学习研究,请务必在下载后24小时内给予删除,不得用于其他任何用途,否则后果自负。基于互联网的特殊性,平台无法对用户传输的作品、信息、内容的权属或合法性、安全性、合规性、真实性、科学性、完整权、有效性等进行实质审查;无论平台是否已进行审查,用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。本站所有资源不代表本站的观点或立场,基于网友分享,根据中国法律《信息网络传播权保护条例》第二十二与二十三条之规定,若资源存在侵权或相关问题请联系本站客服人员,点此联系我们。关于更多版权及免责申明参见 版权及免责申明
网友评论
我要评论