Как работать с Web камерой?
Falk0ner, вс, 06/07/2008 - 15:34.
First of all, get the SDK at http://developer.logitech.comhttp://developer.logitech.com
After installation, open delphi and Import ActiveX Control VPortal2 from the list. Now, create a new form, and put a VideoPortal from the ActiveX panel and a button. In the uses, add VideoPortal
On the OnShow add:
VideoPortal1.PrepareControl('QCSDK',
'HKEY_LOCAL_MACHINE\Software\JCS Programmation\QCSDK', 0);
VideoPortal1.EnableUIElements(UIELEMENT_STATUSBAR, 0, 0);
VideoPortal1.ConnectCamera2;
VideoPortal1.EnablePreview := 1;
'HKEY_LOCAL_MACHINE\Software\JCS Programmation\QCSDK', 0);
VideoPortal1.EnableUIElements(UIELEMENT_STATUSBAR, 0, 0);
VideoPortal1.ConnectCamera2;
VideoPortal1.EnablePreview := 1;
On the ButtonClick add:
var
BMP: TBitmap;
JPG: TJpegImage;
L: string;
begin
F := 'Photos\test.jpg';
VideoPortal1.StampBackgroundColor := clYellow;
VideoPortal1.StampTextColor := clBlack;
VideoPortal1.StampFontName := 'Arial';
VideoPortal1.StampPointSize := 10;
VideoPortal1.StampTransparentBackGround := 0;
L := Format(' %s - %s ', [DateTimeToStr(Now), Num]);
VideoPortal1.PictureToFile(0, 24, 'Temp.bmp', L);
BMP := TBitmap.Create;
JPG := TJpegImage.Create;
BMP.LoadFromFile('Temp.bmp');
JPG.CompressionQuality := 85;
JPG.Assign(BMP);
JPG.SaveToFile(F);
BMP.Free;
JPG.Free;
end;
BMP: TBitmap;
JPG: TJpegImage;
L: string;
begin
F := 'Photos\test.jpg';
VideoPortal1.StampBackgroundColor := clYellow;
VideoPortal1.StampTextColor := clBlack;
VideoPortal1.StampFontName := 'Arial';
VideoPortal1.StampPointSize := 10;
VideoPortal1.StampTransparentBackGround := 0;
L := Format(' %s - %s ', [DateTimeToStr(Now), Num]);
VideoPortal1.PictureToFile(0, 24, 'Temp.bmp', L);
BMP := TBitmap.Create;
JPG := TJpegImage.Create;
BMP.LoadFromFile('Temp.bmp');
JPG.CompressionQuality := 85;
JPG.Assign(BMP);
JPG.SaveToFile(F);
BMP.Free;
JPG.Free;
end;
It's all, run the application, you will see the image from the camera, click on the button to get a picture.
Here is a copy a VideoPortal.Pas (constants).
Code:
unit VideoPortal;
interface
// Copyright (c) 1996-2000 Logitech, Inc. All Rights Reserved
// User Interface Element, codes used with EnableUIElement method
const
UIELEMENT_640x480 = 0;
const
UIELEMENT_320x240 = 1;
const
UIELEMENT_PCSMART = 2;
const
UIELEMENT_STATUSBAR = 3;
const
UIELEMENT_UI = 4;
const
UIELEMENT_CAMERA = 5;
const
UIELEMENT_160x120 = 6;
// Camera status codes, returned by CameraState property
const
CAMERA_OK = 0;
const
CAMERA_UNPLUGGED = 1;
const
CAMERA_INUSE = 2;
const
CAMERA_ERROR = 3;
const
CAMERA_SUSPENDED = 4;
const
CAMERA_DUAL_DETACHED = 5;
const
CAMERA_UNKNOWNSTATUS = 10;
// Movie Recording Modes, used with MovieRecordMode property
const
SEQUENCECAPTURE_FPS_USERSPECIFIED = 1;
const
SEQUENCECAPTURE_FPS_FASTASPOSSIBLE = 2;
const
STEPCAPTURE_MANUALTRIGGERED = 3;
// Movie Creation Flags, used with MovieCreateFlags property
const
MOVIECREATEFLAGS_CREATENEW = 1;
const
MOVIECREATEFLAGS_APPEND = 2;
// Notification Codes
const
NOTIFICATIONMSG_MOTION = 1;
const
NOTIFICATIONMSG_MOVIERECORDERROR = 2;
const
NOTIFICATIONMSG_CAMERADETACHED = 3;
const
NOTIFICATIONMSG_CAMERAREATTACHED = 4;
const
NOTIFICATIONMSG_IMAGESIZECHANGE = 5;
const
NOTIFICATIONMSG_CAMERAPRECHANGE = 6;
const
NOTIFICATIONMSG_CAMERACHANGEFAILED = 7;
const
NOTIFICATIONMSG_POSTCAMERACHANGED = 8;
const
NOTIFICATIONMSG_CAMERBUTTONCLICKED = 9;
const
NOTIFICATIONMSG_VIDEOHOOK = 10;
const
NOTIFICATIONMSG_SETTINGDLGCLOSED = 11;
const
NOTIFICATIONMSG_QUERYPRECAMERAMODIFICATION = 12;
const
NOTIFICATIONMSG_MOVIESIZE = 13;
// Error codes used by NOTIFICATIONMSG_MOVIERECORDERROR notification:
const
WRITEFAILURE_RECORDINGSTOPPED = 0;
const
WRITEFAILURE_RECORDINGSTOPPED_FILECORRUPTANDDELETED = 1;
const
WRITEFAILURE_CAMERA_UNPLUGGED = 2;
const
WRITEFAILURE_CAMERA_SUSPENDED = 3;
// Camera type codes, returned by GetCameraType method
const
CAMERA_UNKNOWN = 0;
const
CAMERA_QUICKCAM_VC = 1;
const
CAMERA_QUICKCAM_QUICKCLIP = 2;
const
CAMERA_QUICKCAM_PRO = 3;
const
CAMERA_QUICKCAM_HOME = 4;
const
CAMERA_QUICKCAM_PRO_B = 5;
const
CAMERA_QUICKCAM_TEKCOM = 6;
const
CAMERA_QUICKCAM_EXPRESS = 7;
const
CAMERA_QUICKCAM_FROG = 8; // MIGHT CHANGE NAME BUT ENUM STAYS THE SAME
const
CAMERA_QUICKCAM_EMERALD = 9; // MIGHT CHANGE NAME BUT ENUM STAYS THE SAME
// Camera-specific property codes used by Set/GetCameraPropertyLong
const
PROPERTY_ORIENTATION = 0;
const
PROPERTY_BRIGHTNESSMODE = 1;
const
PROPERTY_BRIGHTNESS = 2;
const
PROPERTY_CONTRAST = 3;
const
PROPERTY_COLORMODE = 4;
const
PROPERTY_REDGAIN = 5;
const
PROPERTY_BLUEGAIN = 6;
const
PROPERTY_SATURATION = 7;
const
PROPERTY_EXPOSURE = 8;
const
PROPERTY_RESET = 9;
const
PROPERTY_COMPRESSION = 10;
const
PROPERTY_ANTIBLOOM = 11;
const
PROPERTY_LOWLIGHTFILTER = 12;
const
PROPERTY_IMAGEFIELD = 13;
const
PROPERTY_HUE = 14;
const
PROPERTY_PORT_TYPE = 15;
const
PROPERTY_PICTSMART_MODE = 16;
const
PROPERTY_PICTSMART_LIGHT = 17;
const
PROPERTY_PICTSMART_LENS = 18;
const
PROPERTY_MOTION_DETECTION_MODE = 19;
const
PROPERTY_MOTION_SENSITIVITY = 20;
const
PROPERTY_WHITELEVEL = 21;
const
PROPERTY_AUTO_WHITELEVEL = 22;
const
PROPERTY_ANALOGGAIN = 23;
const
PROPERTY_AUTO_ANALOGGAIN = 24;
const
PROPERTY_LOWLIGHTBOOST = 25;
const
PROPERTY_COLORBOOST = 26;
const
PROPERTY_ANTIFLICKER = 27;
const
PROPERTY_OPTIMIZATION_SPEED_QUALITY = 28;
const
PROPERTY_STREAM_HOOK = 29;
const
PROPERTY_LED = 30;
const
ADJUSTMENT_MANUAL = 0;
const
ADJUSTMENT_AUTOMATIC = 1;
const
ORIENTATIONMODE_NORMAL = 0;
const
ORIENTATIONMODE_MIRRORED = 1;
const
ORIENTATIONMODE_FLIPPED = 2;
const
ORIENTATIONMODE_FLIPPED_AND_MIRRORED = 3;
const
COMPRESSION_Q0 = 0;
const
COMPRESSION_Q1 = 1;
const
COMPRESSION_Q2 = 2;
const
ANTIFLICKER_OFF = 0;
const
ANTIFLICKER_50Hz = 1;
const
ANTIFLICKER_60Hz = 2;
const
OPTIMIZE_QUALITY = 0;
const
OPTIMIZE_SPEED = 1;
const
LED_OFF = 0;
const
LED_ON = 1;
const
LED_AUTO = 2;
const
LED_MAX = 3;
const
PICTSMART_LIGHTCORRECTION_NONE = 0;
const
PICTSMART_LIGHTCORRECTION_COOLFLORESCENT = 1;
const
PICTSMART_LIGHTCORRECTION_WARMFLORESCENT = 2;
const
PICTSMART_LIGHTCORRECTION_OUTSIDE = 3;
const
PICTSMART_LIGHTCORRECTION_TUNGSTEN = 4;
const
PICTSMART_LENSCORRECTION_NORMAL = 0;
const
PICTSMART_LENSCORRECTION_WIDEANGLE = 1;
const
PICTSMART_LENSCORRECTION_TELEPHOTO = 2;
const
CAMERADLG_GENERAL = 0;
const
CAMERADLG_ADVANCED = 1;
implementation
end.
Example shows how to use the PictureToMemory method in the QuickCam SDK.
type
TMemoryStream = class(Classes.TMemoryStream);
var
MS: TMemoryStream;
lSize: LongInt;
pBuffer: ^Byte;
begin
MS := TMemoryStream.Create;
bitmap1 := TBitmap.Create;
try
if VideoPortal1.PictureToMemory(0, 24, 0, lSize, '') = 1 then
begin
pBuffer := AllocMem(lSize);
if VideoPortal1.PictureToMemory(0, 24, integer(pBuffer), lSize, '') = 1 then
begin
MS.SetPointer(pBuffer, lSize);
bitmap1.loadfromstream(MS);
end;
end;
finally
MS.Free;
FreeMem(pBuffer);
end;
end;
Взято с Delphi Knowledge Base: http://www.baltsoft.com/
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