SDK Overview
GdTwain ActiveX is a TWAIN ActiveX control which allows developpers to acquire image easily from devices such as scanners, cameras or capture cards. GdTwain ActiveX can be used from any 32-bit and 64-bit Windows development environment that can call ActiveX components, including Visual Basic, Realbasic, Visual C++, Delphi, Visual FoxPro, PHP, ASP, MS Word, Access, Windev, PowerBuilder, Excel, .NET environment like C#, VB.NET and many others. GdTwain ActiveX works with Microsoft Windows platforms: 98, NT4, ME, 2000, XP, 2003, Vista...
Major Product Features:
- Advanced image processing (auto border removal, adjust brightness / contrast / saturation / gamma, rotation...)
- Acquire an image to handle, to file, (multipage Tiff support), to clipboard, byte array, HBitmap, StdPicture...
- Support lzw, ccitt3, ccitt4, rle and Jpeg compression
- Support for 1bit, 4bits, 8bits, 16bits, 24bits, 32bits, 48bits and 64bits color depth
- Image enhancement functions
- Convert any color depth to any color depth, from 1-bit to 64-bit
- Many color quantization and reduction algorithms
- Advanced Text processing: add text with semi transparency effect, draw rotated text...
- Adjust the twain device image resolution (DPI)
- Defines the twain device capture area
- Defines the twain device brightness and contrast
- Enable / disable ADF feeder
- Enable / disable AutoScan mode
- Enable / disable duplex scanning
- Enable / disable Automatic Deskew
- Enable / disable Automatic Rotation
- Enable / disable Automatic Border Detection
- Enable / disable Automatic Brightness
- Select the twain device pixel type, B/W Color, Gray color, RGB color, CMYK color...
- Provides high and low level API
- GdTwain ActiveX control uses the last TWAIN 1.9 specifications.
- ...
Export file formats:
* BMP (standard Windows Bitmap file format).
* ICO (Icone file format).
* GIF, Interlaced GIF (Graphics Interchange file format).
* JPEG (Joint Photographic Expert Group file format).
* PNG (Portable Network Graphics file format).
* TIFF, TIF (Single & Multipage Tagged-Image File format).
* PDF (Single page Portable Document File).
* PNM (Portable Any Map).
Supported TIFF file compressions:
* CCITT Group 3 fax encoding.
* CCITT Group 4 fax encoding.
* CCITT Modified Huffman RLE.
* LZW compression.
* Packbits - Macintosh RLE compression.
* ZIP compression - Deflate.
* JPEG.
System Requirements:
Microsoft Windows (32 bits or 64 bits): 98 / NT4 / ME / 2000 / XP / 2003 / VISTA
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TWAIN scanner & webcam support. 
