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Visual Studio>Controls>Priore ImageScan Components
Priore ImageScan Components

Priore ImageScan Components

Danilo Priore

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What is ImageScan Component ? consists of two components (ActiveX and .NET Assembly) for image scanner TWAIN devices and image processing.
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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, BottomReturn or set the coordinate for image size during the acquisition
 ColorTypeReturn 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
 ImageReturn the current acquisition image
 Quality *Set image quality fro jpeg formats
 ResolutionReturn or set the current DPI resolution for the acquisition
 ShowInterfaceReturn or set if the standard dialog must be shown
 ShowProgressReturn or set the standard progress dialogmust be shown
 UnitTypeReturn or set the units for coordinates
 Methods
 BlackWihite *Converts a bitmap to an 1-bit black and white bitmap
 Blur *Blur the image
 CancelOperationCancel 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
 ScanLoad one images from a image scanner devices
 SelectSourceSelect 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.
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