GdTwain Pro SDK Twain ActiveX Control description
An ActiveX control for developers to display and acquire images from TWAIN devices such as scanners, cameras, capture cards

GdTwain Pro OCX is a TWAIN ActiveX control for developers to display and acquire images from TWAIN devices such as scanners, cameras and capture cards. Thanks to GdTwain Pro you will be able to fully control the process of aquiring an image and display the output image into a High Quality Viewer Control.

You can use an automatic document feeder, use the scanner interface, apply image filters and effects, control all the capabilities of a Twain device like brightness, contrast, saturation, gamma, color depth, auto-deskew, auto border removal and many others options defined into the TWAIN 1.9 Specification.

Here are some key features of "GdTwain Pro SDK Twain ActiveX Control":

· TWAIN - Twain acquisition & Image processing SDK :
· Very easy to use and fast integration within your application
· 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 Pro ActiveX control uses the last TWAIN 1.9 specifications.

· GdViewer - Image Viewer Control :
· Image bitmap and vectorial viewer (very high quality viewer class with many differents view modes)
· Load and print tif, multipage tiff, ico, jpeg, png, wmf, emf, gif, animated gif, dib, pcx, pnm, fax image files
· PDF Viewer
· Multipage Tiff reading, you can change page easly
· Display big image file
· Read binary data types like IStream, IUnknown
· Load image from URL
· Multiple image scaling algorithms (Antialiasing, Bicubic and Nearest Neighbor Interpolation ...)
· Support lzw, ccitt3, ccitt4, rle and Jpeg compression
· Support for 1bit, 4bits, 8bits, 16bits, 24bits, 32bits, 48bits and 64bits pallets color
· Import image from Clipboard, StdPicture, IPicture, HBitmap, DIB, gdiplus handle...
· Advanced rotations 90, 180, 270, 360, Flip X, Flip Y
· Advanced and optimized printing features: Print range of pages from a multi-page file, Print multi-page images in single print jobs, Fit image to paper size...
· Area processing
· User define display area
· Animated Gif Viewer
· Built in timer with TimerTick event
· Advanced scrollbar and autosize features
· Aspect Ratio Control
· Right click pop up menu, including tools, selection, zoom... *
· Built in tools including hand tool, pan and zoom, rectangle selection
· Move / Scroll the image by mouse drag
· Zoom enhance, zoom by height, by width, fit to page...
· User define Zoom and user define area zoom
· Keyboard and Mouse Events
· Change image zoom with mouse whell
· Smooth Scrolling
· Save and restore the specifies position of image (Image MAP system capability)
· GdViewerCnt: Image viewer container class (like a vb picturebox, can contain other controls placed on it)


Supported input image file formats:
· BMP, DIB, RLE (standard Windows Bitmap file format).
· ICO (Icone file format).
· EMF (Enhanced Windows Metafile format).
· GIF, ANIMATED GIF, Interlaced GIF (Graphics Interchange file format).
· JPEG, JPG, JPE, JFIF (Joint Photographic Expert Group file format).
· PNG (Portable Network Graphics file format).
· TIFF, TIF (Single & Multipage Tagged-Image File format).
· WMF (standard Windows Metafile format).
· PNM, PPM, PBM, PGM, RPPM, RPGM, RPBM (Portable Any Map).
· PCX (PC Paintbrush File format).
· PDF (Single & Multipage Portable Document Format).

Supported 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 (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.