Features

With this component is possible to write applications that acquire image from scanner device and to apply a manipulation filter to image acquired or loaded. The collection contains two advanced components for Developer, both in Visual Studio .NET and Visual Studio 6 technology, each with help and information how to use, and includes the examples code.

Requirements

Windows 2000 (Service Pack 2 or higher), Windows XP, Windows 2003, Windows Vista
Visual Basic 6.0 (or other ambient that supports ActiveX technology) ^*
Visual Studio 2003 FrameWork 1.1 (or other ambient that support it) ^**

* only for ActiveX components
** only for VS.NET componenets

Developments

When register this product you can full using the libraries for developers in your other applications. Below describes the properties and methods you can use for single component :

Component			Description
ImageScan (VB6) - TWAIN (VS.NET)
	Propertys
		Left, Top, Right, Bottom	Return or set the coordinate for image size during the acquisition
		ColorType	Return or set the pixel type of current acquisition
		FileName *	Name of file for to save or load image
		FileType *	Set image type fot to save
		Image	Return the current acquisition image
		Quality *	Set image quality fro jpeg formats
		Resolution	Return or set the current DPI resolution for the acquisition
		ShowInterface	Return or set if the standard dialog must be shown
		ShowProgress	Return or set the standard progress dialogmust be shown
		UnitType	Return or set the units for coordinates
	Methods
		BlackWihite *	Converts a bitmap to an 1-bit black and white bitmap
		Blur *	Blur the image
		CancelOperation	Cancel the current acquisition
		Compare *	Compare current bitmap with another bitmap
		Contrast *	Increases or decreases the contrast of the bitmap
		Crop *	Select a area and to crop the display to show only that area
		Fade *	Increases or decreases the transparency of the bitmap
		Fit *	Resize the bitmap to the current view size
		Flip *	Flips the bitmap from top to bottom
		GrayScale *	Converts a bitmap to an 8-bit grayscale bitmap
		Invert *	Inverts the colors in the bitmap, making it like a photographic negative
		Lighten *	Increases or decreases the light of the bitmap
		Load *	Load one images from a file (GIF, BMP, TIFF, JPEG, PNG)
		Resize *	Resize the bitmap
		Reverse *	Reverses the bitmap (left to right) to produce a mirror image
		Rotate *	Rotates the bitmap to +90°
		Save *	Save the current image in to a file (GIF, BMP, TIFF, JPEG, PNG)
		SaveAdd *	Save the current image in to a TIFF multipage file
		Scan	Load one images from a image scanner devices
		SelectSource	Select a devices of image scanner
		Sharpen *	Increases the sharpness of the image in the bitmap
		ShowLoad *	Select a file to load with standard dialog interface
		ShowSave *	Save current bitmap in to file with standard dialog interface
		Zoom *	Increases or decreases the zoom of the bitmap

* only for ImageScan ActiveX

Below a simple example for VB.NET version :

Imports Priore.ControlsDim TW As TwainTW = New Twain(Me.Handle)TW.Resolution = 100TW.ColorType = Twain.TWAIN_CLASS_COLOURTPYE.twRGBTW.ShowInterface = TrueTW.ShowProgress = TrueTW.StartScanPictureBox1.Image = TW.ImageTW.Image.Save(“myimage.jpg”)

NOTE: some drivers scanners ignoring the settings of particular capability. One this situation is when you are trying to set or get the capability, which is not supported at all by your driver or when you are trying to set value out of the range of supported values for particular capability, particular device or context. This component not be able for to use with ADF (Automatic Document Feeder) special type scanners. TWAIN defines a standard software protocol and application programming interface (API) for communication between software applications and image acquisition devices. TWAIN Provides image acquisition solutions. Users need a painless way to get image data into their applications. Software developers need compatibility with the widest range of output devices without writing and maintaining multiple device drivers. The solution to this situation is an open industry interface (TWAIN) that directly acquires image data from external sources while within an application. With this, each software developer supports a standard data acquisition manager and each hardware vendor writes one driver for their device. Hardware vendors benefit because they need only provide one standard driver for their device, which can then be used by all software applications supporting the TWAIN data acquisition interface. TWAIN defines how application developers can acquire image data directly into their application without requiring the user to switch out of the application. To provide this feature, TWAIN requires Data Sources to provide a built-in user interface (UI) for their device. Application developers can, if they choose, disable the built-in User Interface provided by the Data Source and provide their own User Interface to control TWAIN devices.